annotate genesis.c @ 2283:6f6f21d0c396

Fix missing address masks on some VRAM reads
author Michael Pavone <pavone@retrodev.com>
date Mon, 09 Jan 2023 00:15:26 -0800
parents b9fed07f19e4
children 5d3411f52d00
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1 /*
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2 Copyright 2013-2016 Michael Pavone
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
3 This file is part of BlastEm.
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
5 */
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
6 #include "genesis.h"
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
7 #include "segacd.h"
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
8 #include "blastem.h"
1414
d94855080529 Move I2C EEPROM and NOR Flash functions out of romdb.c into new files
Michael Pavone <pavone@retrodev.com>
parents: 1401
diff changeset
9 #include "nor.h"
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
10 #include <stdlib.h>
1188
448ce87b87fc Fix missing include that prevented building Windows version
Michael Pavone <pavone@retrodev.com>
parents: 1184
diff changeset
11 #include <ctype.h>
1204
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
12 #include <time.h>
1220
1e7977460d18 Add mising include in genesis.c so the Windows build works again
Michael Pavone <pavone@retrodev.com>
parents: 1215
diff changeset
13 #include <string.h>
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
14 #include "render.h"
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
15 #include "gst.h"
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
16 #include "util.h"
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
17 #include "debug.h"
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
18 #include "gdb_remote.h"
1478
da1dce39e846 Refactored save slot related logic to reduce duplication and allow reuse in new UI. Get state loading/saving mostly working in new UI
Michael Pavone <pavone@retrodev.com>
parents: 1471
diff changeset
19 #include "saves.h"
1583
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
20 #include "bindings.h"
1610
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
21 #include "jcart.h"
1901
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
22 #include "config.h"
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
23 #include "event_log.h"
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
24 #include "paths.h"
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
25 #define MCLKS_NTSC 53693175
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
26 #define MCLKS_PAL 53203395
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
27
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
28 uint32_t MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
29 #define MCLKS_PER_YM 7
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
30 #define MCLKS_PER_Z80 15
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
31 #define MCLKS_PER_PSG (MCLKS_PER_Z80*16)
1291
f17fe0d00626 Adjust Z80 interrupt pulse duration to match hardware measurements
Michael Pavone <pavone@retrodev.com>
parents: 1288
diff changeset
32 #define Z80_INT_PULSE_MCLKS 2573 //measured value is ~171.5 Z80 clocks
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
33 #define DEFAULT_SYNC_INTERVAL MCLKS_LINE
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
34 #define DEFAULT_LOWPASS_CUTOFF 3390
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
35
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
36 //TODO: Figure out the exact value for this
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
37 #define LINES_NTSC 262
1556
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
38 #define LINES_PAL 313
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
39
1688
395f684c5379 Fixed the most glaring issues in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1643
diff changeset
40 #ifdef IS_LIB
1927
9fd4bedc1a31 Update libretro target to use render_audio shared audio code
Mike Pavone <pavone@retrodev.com>
parents: 1915
diff changeset
41 #define MAX_SOUND_CYCLES (MCLKS_PER_YM*NUM_OPERATORS*6*4)
1688
395f684c5379 Fixed the most glaring issues in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1643
diff changeset
42 #else
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
43 #define MAX_SOUND_CYCLES 100000
1688
395f684c5379 Fixed the most glaring issues in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1643
diff changeset
44 #endif
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
45
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
46 #ifdef NEW_CORE
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
47 #define Z80_CYCLE cycles
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
48 #define Z80_OPTS opts
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
49 #define z80_handle_code_write(...)
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
50 #else
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
51 #define Z80_CYCLE current_cycle
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
52 #define Z80_OPTS options
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
53 #endif
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
54
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
55 void genesis_serialize(genesis_context *gen, serialize_buffer *buf, uint32_t m68k_pc, uint8_t all)
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
56 {
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
57 if (all) {
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
58 start_section(buf, SECTION_68000);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
59 m68k_serialize(gen->m68k, m68k_pc, buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
60 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
61
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
62 start_section(buf, SECTION_Z80);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
63 z80_serialize(gen->z80, buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
64 end_section(buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
65 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
66
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
67 start_section(buf, SECTION_VDP);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
68 vdp_serialize(gen->vdp, buf);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
69 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
70
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
71 start_section(buf, SECTION_YM2612);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
72 ym_serialize(gen->ym, buf);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
73 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
74
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
75 start_section(buf, SECTION_PSG);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
76 psg_serialize(gen->psg, buf);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
77 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
78
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
79 if (all) {
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
80 start_section(buf, SECTION_GEN_BUS_ARBITER);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
81 save_int8(buf, gen->z80->reset);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
82 save_int8(buf, gen->z80->busreq);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
83 save_int16(buf, gen->z80_bank_reg);
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
84 //I think the refresh logic may technically be part of the VDP, but whatever
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
85 save_int32(buf, gen->last_sync_cycle);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
86 save_int32(buf, gen->refresh_counter);
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
87 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
88
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
89 start_section(buf, SECTION_SEGA_IO_1);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
90 io_serialize(gen->io.ports, buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
91 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
92
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
93 start_section(buf, SECTION_SEGA_IO_2);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
94 io_serialize(gen->io.ports + 1, buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
95 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
96
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
97 start_section(buf, SECTION_SEGA_IO_EXT);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
98 io_serialize(gen->io.ports + 2, buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
99 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
100
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
101 start_section(buf, SECTION_MAIN_RAM);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
102 save_int8(buf, RAM_WORDS * 2 / 1024);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
103 save_buffer16(buf, gen->work_ram, RAM_WORDS);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
104 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
105
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
106 start_section(buf, SECTION_SOUND_RAM);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
107 save_int8(buf, Z80_RAM_BYTES / 1024);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
108 save_buffer8(buf, gen->zram, Z80_RAM_BYTES);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
109 end_section(buf);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
110
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
111 if (gen->version_reg & 0xF) {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
112 //only save TMSS info if it's present
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
113 //that will allow a state saved on a model lacking TMSS
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
114 //to be loaded on a model that has it
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
115 start_section(buf, SECTION_TMSS);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
116 save_int8(buf, gen->tmss);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
117 save_buffer16(buf, gen->tmss_lock, 2);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
118 end_section(buf);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
119 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
120
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
121 cart_serialize(&gen->header, buf);
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
122 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
123 if (gen->expansion) {
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
124 segacd_context *cd = gen->expansion;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
125 segacd_serialize(cd, buf, all);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
126 }
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
127 }
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
128
1690
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
129 static uint8_t *serialize(system_header *sys, size_t *size_out)
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
130 {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
131 genesis_context *gen = (genesis_context *)sys;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
132 uint32_t address;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
133 if (gen->m68k->resume_pc) {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
134 gen->m68k->target_cycle = gen->m68k->current_cycle;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
135 gen->header.save_state = SERIALIZE_SLOT+1;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
136 resume_68k(gen->m68k);
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
137 if (size_out) {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
138 *size_out = gen->serialize_size;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
139 }
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
140 return gen->serialize_tmp;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
141 } else {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
142 serialize_buffer state;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
143 init_serialize(&state);
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
144 uint32_t address = read_word(4, (void **)gen->m68k->mem_pointers, &gen->m68k->options->gen, gen->m68k) << 16;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
145 address |= read_word(6, (void **)gen->m68k->mem_pointers, &gen->m68k->options->gen, gen->m68k);
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
146 genesis_serialize(gen, &state, address, 1);
1690
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
147 if (size_out) {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
148 *size_out = state.size;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
149 }
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
150 return state.data;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
151 }
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
152 }
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
153
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
154 static void ram_deserialize(deserialize_buffer *buf, void *vgen)
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
155 {
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
156 genesis_context *gen = vgen;
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
157 uint32_t ram_size = load_int8(buf) * 1024 / 2;
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
158 if (ram_size > RAM_WORDS) {
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
159 fatal_error("State has a RAM size of %d bytes", ram_size * 2);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
160 }
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
161 load_buffer16(buf, gen->work_ram, ram_size);
1452
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
162 m68k_invalidate_code_range(gen->m68k, 0xE00000, 0x1000000);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
163 }
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
164
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
165 static void zram_deserialize(deserialize_buffer *buf, void *vgen)
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
166 {
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
167 genesis_context *gen = vgen;
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
168 uint32_t ram_size = load_int8(buf) * 1024;
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
169 if (ram_size > Z80_RAM_BYTES) {
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
170 fatal_error("State has a Z80 RAM size of %d bytes", ram_size);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
171 }
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
172 load_buffer8(buf, gen->zram, ram_size);
1452
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
173 z80_invalidate_code_range(gen->z80, 0, 0x4000);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
174 }
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
175
1445
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
176 static void update_z80_bank_pointer(genesis_context *gen)
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
177 {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
178 if (gen->z80_bank_reg < 0x140) {
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
179 gen->z80->mem_pointers[1] = get_native_pointer(gen->z80_bank_reg << 15, (void **)gen->m68k->mem_pointers, &gen->m68k->options->gen);
1445
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
180 } else {
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
181 gen->z80->mem_pointers[1] = NULL;
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
182 }
1753
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
183 z80_invalidate_code_range(gen->z80, 0x8000, 0xFFFF);
1445
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
184 }
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
185
1440
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
186 static void bus_arbiter_deserialize(deserialize_buffer *buf, void *vgen)
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
187 {
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
188 genesis_context *gen = vgen;
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
189 gen->z80->reset = load_int8(buf);
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
190 gen->z80->busreq = load_int8(buf);
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
191 gen->z80_bank_reg = load_int16(buf) & 0x1FF;
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
192 if ((buf->size - buf->cur_pos) >= 2 * sizeof(uint32_t)) {
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
193 gen->last_sync_cycle = load_int32(buf);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
194 gen->refresh_counter = load_int32(buf);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
195 } else {
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
196 //save state is from an older version of BlastEm that lacks these fields
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
197 //set them to reasonable values
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
198 gen->last_sync_cycle = gen->m68k->current_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
199 gen->refresh_counter = 0;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
200 }
1440
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
201 }
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
202
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
203 static void tmss_deserialize(deserialize_buffer *buf, void *vgen)
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
204 {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
205 genesis_context *gen = vgen;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
206 gen->tmss = load_int8(buf);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
207 load_buffer16(buf, gen->tmss_lock, 2);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
208 }
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
209
1636
d2775a242dc6 Make sure M68K sync and target cycles are updated after loading a savestate. Fixes an issue in which loading a savestate would result in things being unresponsive until emulation cycle caught up to whatever the pre-state load sync cycle was
Mike Pavone <pavone@retrodev.com>
parents: 1631
diff changeset
210 static void adjust_int_cycle(m68k_context * context, vdp_context * v_context);
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
211 static void check_tmss_lock(genesis_context *gen);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
212 static void toggle_tmss_rom(genesis_context *gen);
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
213 #include "m68k_internal.h" //needed for get_native_address_trans, should be eliminated once handling of PC is cleaned up
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
214 void genesis_deserialize(deserialize_buffer *buf, genesis_context *gen)
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
215 {
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
216 register_section_handler(buf, (section_handler){.fun = m68k_deserialize, .data = gen->m68k}, SECTION_68000);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
217 register_section_handler(buf, (section_handler){.fun = z80_deserialize, .data = gen->z80}, SECTION_Z80);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
218 register_section_handler(buf, (section_handler){.fun = vdp_deserialize, .data = gen->vdp}, SECTION_VDP);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
219 register_section_handler(buf, (section_handler){.fun = ym_deserialize, .data = gen->ym}, SECTION_YM2612);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
220 register_section_handler(buf, (section_handler){.fun = psg_deserialize, .data = gen->psg}, SECTION_PSG);
1440
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
221 register_section_handler(buf, (section_handler){.fun = bus_arbiter_deserialize, .data = gen}, SECTION_GEN_BUS_ARBITER);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
222 register_section_handler(buf, (section_handler){.fun = io_deserialize, .data = gen->io.ports}, SECTION_SEGA_IO_1);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
223 register_section_handler(buf, (section_handler){.fun = io_deserialize, .data = gen->io.ports + 1}, SECTION_SEGA_IO_2);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
224 register_section_handler(buf, (section_handler){.fun = io_deserialize, .data = gen->io.ports + 2}, SECTION_SEGA_IO_EXT);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
225 register_section_handler(buf, (section_handler){.fun = ram_deserialize, .data = gen}, SECTION_MAIN_RAM);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
226 register_section_handler(buf, (section_handler){.fun = zram_deserialize, .data = gen}, SECTION_SOUND_RAM);
1444
14a2834d010c Save/restore mapper state in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1440
diff changeset
227 register_section_handler(buf, (section_handler){.fun = cart_deserialize, .data = gen}, SECTION_MAPPER);
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
228 register_section_handler(buf, (section_handler){.fun = tmss_deserialize, .data = gen}, SECTION_TMSS);
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
229 if (gen->expansion) {
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
230 segacd_context *cd = gen->expansion;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
231 segacd_register_section_handlers(cd, buf);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
232 }
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
233 uint8_t tmss_old = gen->tmss;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
234 gen->tmss = 0xFF;
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
235 while (buf->cur_pos < buf->size)
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
236 {
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
237 load_section(buf);
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
238 }
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
239 if (gen->version_reg & 0xF) {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
240 if (gen->tmss == 0xFF) {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
241 //state lacked a TMSS section, assume that the game ROM is mapped in
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
242 //and that the VDP is unlocked
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
243 gen->tmss_lock[0] = 0x5345;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
244 gen->tmss_lock[1] = 0x4741;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
245 gen->tmss = 1;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
246 }
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
247 if (gen->tmss != tmss_old) {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
248 toggle_tmss_rom(gen);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
249 }
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
250 check_tmss_lock(gen);
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
251 }
1445
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
252 update_z80_bank_pointer(gen);
1636
d2775a242dc6 Make sure M68K sync and target cycles are updated after loading a savestate. Fixes an issue in which loading a savestate would result in things being unresponsive until emulation cycle caught up to whatever the pre-state load sync cycle was
Mike Pavone <pavone@retrodev.com>
parents: 1631
diff changeset
253 adjust_int_cycle(gen->m68k, gen->vdp);
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
254 //HACK: Fix this once PC/IR is represented in a better way in 68K core
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
255 //Would be better for this hack to live in side the 68K core itself, but it's better to do it
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
256 //after RAM has been loaded to avoid any unnecessary retranslation
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
257 gen->m68k->resume_pc = get_native_address_trans(gen->m68k, gen->m68k->last_prefetch_address);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
258 if (gen->expansion) {
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
259 segacd_context *cd = gen->expansion;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
260 cd->m68k->resume_pc = get_native_address_trans(cd->m68k, cd->m68k->last_prefetch_address);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
261 }
1690
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
262 free(buf->handlers);
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
263 buf->handlers = NULL;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
264 }
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
265
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
266 static void deserialize(system_header *sys, uint8_t *data, size_t size)
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
267 {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
268 genesis_context *gen = (genesis_context *)sys;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
269 deserialize_buffer buffer;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
270 init_deserialize(&buffer, data, size);
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
271 genesis_deserialize(&buffer, gen);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
272 }
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
273
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
274 uint16_t read_dma_value(uint32_t address)
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
275 {
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
276 genesis_context *genesis = (genesis_context *)current_system;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
277 address *= 2;
1420
975b5b7eaa77 Fix DMA from byte-wide SRAM
Michael Pavone <pavone@retrodev.com>
parents: 1416
diff changeset
278 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area
975b5b7eaa77 Fix DMA from byte-wide SRAM
Michael Pavone <pavone@retrodev.com>
parents: 1416
diff changeset
279 if ((address >= 0xA00000 && address < 0xB00000) || (address >= 0xC00000 && address <= 0xE00000)) {
975b5b7eaa77 Fix DMA from byte-wide SRAM
Michael Pavone <pavone@retrodev.com>
parents: 1416
diff changeset
280 return 0;
975b5b7eaa77 Fix DMA from byte-wide SRAM
Michael Pavone <pavone@retrodev.com>
parents: 1416
diff changeset
281 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
282 if (genesis->expansion) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
283 segacd_context *cd = genesis->expansion;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
284 uint32_t word_ram = cd->base + 0x200000;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
285 uint32_t word_ram_end = cd->base + 0x240000;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
286 if (address >= word_ram && address < word_ram_end) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
287 //FIXME: first word should just be garbage
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
288 address -= 2;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
289 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
290 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
291
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
292 return read_word(address, (void **)genesis->m68k->mem_pointers, &genesis->m68k->options->gen, genesis->m68k);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
293 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
294
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
295 static uint16_t get_open_bus_value(system_header *system)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
296 {
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
297 genesis_context *genesis = (genesis_context *)system;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
298 return read_dma_value(genesis->m68k->last_prefetch_address/2);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
299 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
300
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
301 static void adjust_int_cycle(m68k_context * context, vdp_context * v_context)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
302 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
303 //static int old_int_cycle = CYCLE_NEVER;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
304 genesis_context *gen = context->system;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
305 if (context->sync_cycle - context->current_cycle > gen->max_cycles) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
306 context->sync_cycle = context->current_cycle + gen->max_cycles;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
307 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
308 context->int_cycle = CYCLE_NEVER;
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
309 uint8_t mask = context->status & 0x7;
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
310 if (mask < 6) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
311 uint32_t next_vint = vdp_next_vint(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
312 if (next_vint != CYCLE_NEVER) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
313 context->int_cycle = next_vint;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
314 context->int_num = 6;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
315 }
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
316 if (mask < 4) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
317 uint32_t next_hint = vdp_next_hint(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
318 if (next_hint != CYCLE_NEVER) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
319 next_hint = next_hint < context->current_cycle ? context->current_cycle : next_hint;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
320 if (next_hint < context->int_cycle) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
321 context->int_cycle = next_hint;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
322 context->int_num = 4;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
323
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
324 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
325 }
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
326 if (mask < 2 && (v_context->regs[REG_MODE_3] & BIT_EINT_EN)) {
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
327 uint32_t next_eint_port0 = io_next_interrupt(gen->io.ports, context->current_cycle);
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
328 uint32_t next_eint_port1 = io_next_interrupt(gen->io.ports + 1, context->current_cycle);
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
329 uint32_t next_eint_port2 = io_next_interrupt(gen->io.ports + 2, context->current_cycle);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
330 uint32_t next_eint = next_eint_port0 < next_eint_port1
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
331 ? (next_eint_port0 < next_eint_port2 ? next_eint_port0 : next_eint_port2)
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
332 : (next_eint_port1 < next_eint_port2 ? next_eint_port1 : next_eint_port2);
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
333 if (next_eint != CYCLE_NEVER) {
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
334 next_eint = next_eint < context->current_cycle ? context->current_cycle : next_eint;
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
335 if (next_eint < context->int_cycle) {
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
336 context->int_cycle = next_eint;
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
337 context->int_num = 2;
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
338 }
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
339 }
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
340 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
341 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
342 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
343 if (context->int_cycle > context->current_cycle && context->int_pending == INT_PENDING_SR_CHANGE) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
344 context->int_pending = INT_PENDING_NONE;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
345 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
346 /*if (context->int_cycle != old_int_cycle) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
347 printf("int cycle changed to: %d, level: %d @ %d(%d), frame: %d, vcounter: %d, hslot: %d, mask: %d, hint_counter: %d\n", context->int_cycle, context->int_num, v_context->cycles, context->current_cycle, v_context->frame, v_context->vcounter, v_context->hslot, context->status & 0x7, v_context->hint_counter);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
348 old_int_cycle = context->int_cycle;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
349 }*/
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
350
1304
5b90d7669eee Fix exit trace mode edge case. Call do_sync if trace mode bit is changed in eori sr
Michael Pavone <pavone@retrodev.com>
parents: 1303
diff changeset
351 if (context->status & M68K_STATUS_TRACE || context->trace_pending) {
1303
208803173ebc Implemented M68K trace mode. Some edge cases/SR update paths still need work
Michael Pavone <pavone@retrodev.com>
parents: 1291
diff changeset
352 context->target_cycle = context->current_cycle;
208803173ebc Implemented M68K trace mode. Some edge cases/SR update paths still need work
Michael Pavone <pavone@retrodev.com>
parents: 1291
diff changeset
353 return;
208803173ebc Implemented M68K trace mode. Some edge cases/SR update paths still need work
Michael Pavone <pavone@retrodev.com>
parents: 1291
diff changeset
354 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
355
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
356 context->target_cycle = context->int_cycle < context->sync_cycle ? context->int_cycle : context->sync_cycle;
1998
0740d90812ee Enter debugger when a VDP data port read would cause a CPU lockup
Mike Pavone <pavone@retrodev.com>
parents: 1987
diff changeset
357 if (context->should_return || gen->header.enter_debugger) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
358 context->target_cycle = context->current_cycle;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
359 } else if (context->target_cycle < context->current_cycle) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
360 //Changes to SR can result in an interrupt cycle that's in the past
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
361 //This can cause issues with the implementation of STOP though
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
362 context->target_cycle = context->current_cycle;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
363 }
1364
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
364 if (context->target_cycle == context->int_cycle) {
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
365 //Currently delays from Z80 access and refresh are applied only when we sync
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
366 //this can cause extra latency when it comes to interrupts
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
367 //to prevent this code forces some extra synchronization in the period immediately before an interrupt
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
368 if ((context->target_cycle - context->current_cycle) > gen->int_latency_prev1) {
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
369 context->target_cycle = context->sync_cycle = context->int_cycle - gen->int_latency_prev1;
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
370 } else if ((context->target_cycle - context->current_cycle) > gen->int_latency_prev2) {
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
371 context->target_cycle = context->sync_cycle = context->int_cycle - gen->int_latency_prev2;
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
372 } else {
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
373 context->target_cycle = context->sync_cycle = context->current_cycle;
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
374 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
375
1364
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
376 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
377 /*printf("Cyc: %d, Trgt: %d, Int Cyc: %d, Int: %d, Mask: %X, V: %d, H: %d, HICount: %d, HReg: %d, Line: %d\n",
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
378 context->current_cycle, context->target_cycle, context->int_cycle, context->int_num, (context->status & 0x7),
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
379 v_context->regs[REG_MODE_2] & 0x20, v_context->regs[REG_MODE_1] & 0x10, v_context->hint_counter, v_context->regs[REG_HINT], v_context->cycles / MCLKS_LINE);*/
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
380 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
381
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
382 //#define DO_DEBUG_PRINT
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
383 #ifdef DO_DEBUG_PRINT
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
384 #define dprintf printf
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
385 #define dputs puts
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
386 #else
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
387 #define dprintf
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
388 #define dputs
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
389 #endif
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
390
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
391 static void z80_next_int_pulse(z80_context * z_context)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
392 {
1108
87114df913ec Fix Z80 interrupt pulse duration. Fixes inconsistent music playback speed in Sonic 2 introduced in 0.4.1
Michael Pavone <pavone@retrodev.com>
parents: 1105
diff changeset
393 genesis_context * gen = z_context->system;
1753
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
394 #ifdef NEW_CORE
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
395 z_context->int_cycle = vdp_next_vint_z80(gen->vdp);
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
396 z_context->int_end_cycle = z_context->int_cycle + Z80_INT_PULSE_MCLKS;
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
397 z_context->int_value = 0xFF;
1766
1dc718581aac Fix Z80 interrupts in Gen/MD mode when using new core. Disable CPU debug log in new Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 1753
diff changeset
398 z80_sync_cycle(z_context, z_context->sync_cycle);
1753
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
399 #else
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
400 z_context->int_pulse_start = vdp_next_vint_z80(gen->vdp);
1291
f17fe0d00626 Adjust Z80 interrupt pulse duration to match hardware measurements
Michael Pavone <pavone@retrodev.com>
parents: 1288
diff changeset
401 z_context->int_pulse_end = z_context->int_pulse_start + Z80_INT_PULSE_MCLKS;
1471
2e6320d261ff Implemented Z80 IM 2 and attempted correct intack cycle delay
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
402 z_context->im2_vector = 0xFF;
1753
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
403 #endif
1108
87114df913ec Fix Z80 interrupt pulse duration. Fixes inconsistent music playback speed in Sonic 2 introduced in 0.4.1
Michael Pavone <pavone@retrodev.com>
parents: 1105
diff changeset
404 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
405
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
406 static void sync_z80(genesis_context *gen, uint32_t mclks)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
407 {
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
408 z80_context *z_context = gen->z80;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
409 #ifndef NO_Z80
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
410 if (z80_enabled) {
1753
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
411 #ifdef NEW_CORE
1766
1dc718581aac Fix Z80 interrupts in Gen/MD mode when using new core. Disable CPU debug log in new Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 1753
diff changeset
412 if (z_context->int_cycle == 0xFFFFFFFFU) {
1dc718581aac Fix Z80 interrupts in Gen/MD mode when using new core. Disable CPU debug log in new Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 1753
diff changeset
413 z80_next_int_pulse(z_context);
1dc718581aac Fix Z80 interrupts in Gen/MD mode when using new core. Disable CPU debug log in new Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 1753
diff changeset
414 }
1753
33ec5df77fac Integration of new Z80 core is sort of working now
Michael Pavone <pavone@retrodev.com>
parents: 1752
diff changeset
415 #endif
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
416 if (gen->enter_z80_debugger && !z_context->reset && !z_context->busack) {
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
417 while (!z_context->pc) {
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
418 z80_run(z_context, z_context->current_cycle + 4);
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
419 }
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
420 gen->enter_z80_debugger = 0;
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
421 zdebugger(z_context, z_context->pc);
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
422 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
423 z80_run(z_context, mclks);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
424 } else
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
425 #endif
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
426 {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
427 z_context->Z80_CYCLE = mclks;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
428 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
429 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
430
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
431 static void sync_sound(genesis_context * gen, uint32_t target)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
432 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
433 //printf("YM | Cycle: %d, bpos: %d, PSG | Cycle: %d, bpos: %d\n", gen->ym->current_cycle, gen->ym->buffer_pos, gen->psg->cycles, gen->psg->buffer_pos * 2);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
434 while (target > gen->psg->cycles && target - gen->psg->cycles > MAX_SOUND_CYCLES) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
435 uint32_t cur_target = gen->psg->cycles + MAX_SOUND_CYCLES;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
436 //printf("Running PSG to cycle %d\n", cur_target);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
437 psg_run(gen->psg, cur_target);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
438 //printf("Running YM-2612 to cycle %d\n", cur_target);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
439 ym_run(gen->ym, cur_target);
2080
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2054
diff changeset
440 if (gen->expansion) {
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2054
diff changeset
441 scd_run(gen->expansion, gen_cycle_to_scd(cur_target, gen));
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2054
diff changeset
442 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
443 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
444 psg_run(gen->psg, target);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
445 ym_run(gen->ym, target);
2080
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2054
diff changeset
446 if (gen->expansion) {
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2054
diff changeset
447 scd_run(gen->expansion, gen_cycle_to_scd(target, gen));
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2054
diff changeset
448 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
449
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
450 //printf("Target: %d, YM bufferpos: %d, PSG bufferpos: %d\n", target, gen->ym->buffer_pos, gen->psg->buffer_pos * 2);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
451 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
452
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
453 #define REFRESH_INTERVAL 128
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
454 #define REFRESH_DELAY 2
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
455
1170
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
456 #include <limits.h>
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
457 #define ADJUST_BUFFER (8*MCLKS_LINE*313)
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
458 #define MAX_NO_ADJUST (UINT_MAX-ADJUST_BUFFER)
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
459
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
460 static m68k_context *sync_components(m68k_context * context, uint32_t address)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
461 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
462 genesis_context * gen = context->system;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
463 vdp_context * v_context = gen->vdp;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
464 z80_context * z_context = gen->z80;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
465 //lame estimation of refresh cycle delay
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
466 gen->refresh_counter += context->current_cycle - gen->last_sync_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
467 if (!gen->bus_busy) {
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
468 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
469 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
470 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
471
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
472 uint32_t mclks = context->current_cycle;
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
473 sync_z80(gen, mclks);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
474 sync_sound(gen, mclks);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
475 vdp_run_context(v_context, mclks);
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
476 io_run(gen->io.ports, mclks);
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
477 io_run(gen->io.ports + 1, mclks);
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
478 io_run(gen->io.ports + 2, mclks);
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
479 if (gen->expansion) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
480 scd_run(gen->expansion, gen_cycle_to_scd(mclks, gen));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
481 }
1556
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
482 if (mclks >= gen->reset_cycle) {
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
483 gen->reset_requested = 1;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
484 context->should_return = 1;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
485 gen->reset_cycle = CYCLE_NEVER;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
486 }
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
487 if (v_context->frame != gen->last_frame) {
2243
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
488 if (gen->ym->scope) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
489 scope_render(gen->ym->scope);
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
490 }
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
491 //printf("reached frame end %d | MCLK Cycles: %d, Target: %d, VDP cycles: %d, vcounter: %d, hslot: %d\n", gen->last_frame, mclks, gen->frame_end, v_context->cycles, v_context->vcounter, v_context->hslot);
2179
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
492 uint32_t elapsed = v_context->frame - gen->last_frame;
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
493 gen->last_frame = v_context->frame;
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
494 event_flush(mclks);
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
495 gen->last_flush_cycle = mclks;
2179
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
496 if (gen->header.enter_debugger_frames) {
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
497 if (elapsed >= gen->header.enter_debugger_frames) {
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
498 gen->header.enter_debugger_frames = 0;
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
499 gen->header.enter_debugger = 1;
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
500 } else {
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
501 gen->header.enter_debugger_frames -= elapsed;
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
502 }
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
503 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
504
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
505 if(exit_after){
2179
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
506 if (elapsed >= exit_after) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
507 exit(0);
2179
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
508 } else {
9a8dd4ba2753 Implement frame advance debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2164
diff changeset
509 exit_after -= elapsed;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
510 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
511 }
1170
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
512 if (context->current_cycle > MAX_NO_ADJUST) {
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
513 uint32_t deduction = mclks - ADJUST_BUFFER;
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
514 vdp_adjust_cycles(v_context, deduction);
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
515 io_adjust_cycles(gen->io.ports, context->current_cycle, deduction);
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
516 io_adjust_cycles(gen->io.ports+1, context->current_cycle, deduction);
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
517 io_adjust_cycles(gen->io.ports+2, context->current_cycle, deduction);
1610
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
518 if (gen->mapper_type == MAPPER_JCART) {
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
519 jcart_adjust_cycles(gen, deduction);
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
520 }
1170
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
521 context->current_cycle -= deduction;
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
522 z80_adjust_cycles(z_context, deduction);
1902
32a3aa7b4a45 Fix YM2612 busy flag timing
Michael Pavone <pavone@retrodev.com>
parents: 1901
diff changeset
523 ym_adjust_cycles(gen->ym, deduction);
1909
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
524 if (gen->ym->vgm) {
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
525 vgm_adjust_cycles(gen->ym->vgm, deduction);
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
526 }
1170
9170fc4d9835 Don't adjust cycles every frame. Only when we start getting close to UINT_MAX. Don't adjust all the way down to zero when we do adjust. Shouldn't fix anything, but may make debugging current issues easier.
Michael Pavone <pavone@retrodev.com>
parents: 1165
diff changeset
527 gen->psg->cycles -= deduction;
1556
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
528 if (gen->reset_cycle != CYCLE_NEVER) {
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
529 gen->reset_cycle -= deduction;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
530 }
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
531 event_cycle_adjust(mclks, deduction);
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
532 if (gen->expansion) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
533 scd_adjust_cycle(gen->expansion, deduction);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
534 }
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
535 gen->last_flush_cycle -= deduction;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
536 }
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
537 } else if (mclks - gen->last_flush_cycle > gen->soft_flush_cycles) {
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
538 event_soft_flush(mclks);
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
539 gen->last_flush_cycle = mclks;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
540 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
541 gen->frame_end = vdp_cycles_to_frame_end(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
542 context->sync_cycle = gen->frame_end;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
543 //printf("Set sync cycle to: %d @ %d, vcounter: %d, hslot: %d\n", context->sync_cycle, context->current_cycle, v_context->vcounter, v_context->hslot);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
544 if (context->int_ack) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
545 //printf("acknowledging %d @ %d:%d, vcounter: %d, hslot: %d\n", context->int_ack, context->current_cycle, v_context->cycles, v_context->vcounter, v_context->hslot);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
546 vdp_int_ack(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
547 context->int_ack = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
548 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
549 if (!address && (gen->header.enter_debugger || gen->header.save_state)) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
550 context->sync_cycle = context->current_cycle + 1;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
551 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
552 adjust_int_cycle(context, v_context);
1556
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
553 if (gen->reset_cycle < context->target_cycle) {
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
554 context->target_cycle = gen->reset_cycle;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
555 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
556 if (address) {
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
557 if (gen->header.enter_debugger) {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
558 gen->header.enter_debugger = 0;
2033
894bf99a13f1 Make ui.enter_debuger respect which debuger is active
Michael Pavone <pavone@retrodev.com>
parents: 2025
diff changeset
559 if (gen->header.debugger_type == DEBUGGER_NATIVE) {
894bf99a13f1 Make ui.enter_debuger respect which debuger is active
Michael Pavone <pavone@retrodev.com>
parents: 2025
diff changeset
560 debugger(context, address);
894bf99a13f1 Make ui.enter_debuger respect which debuger is active
Michael Pavone <pavone@retrodev.com>
parents: 2025
diff changeset
561 } else {
894bf99a13f1 Make ui.enter_debuger respect which debuger is active
Michael Pavone <pavone@retrodev.com>
parents: 2025
diff changeset
562 gdb_debug_enter(context, address);
894bf99a13f1 Make ui.enter_debuger respect which debuger is active
Michael Pavone <pavone@retrodev.com>
parents: 2025
diff changeset
563 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
564 }
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
565 #ifdef NEW_CORE
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
566 if (gen->header.save_state) {
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
567 #else
1440
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
568 if (gen->header.save_state && (z_context->pc || !z_context->native_pc || z_context->reset || !z_context->busreq)) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
569 #endif
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
570 uint8_t slot = gen->header.save_state - 1;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
571 gen->header.save_state = 0;
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
572 #ifndef NEW_CORE
1440
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
573 if (z_context->native_pc && !z_context->reset) {
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
574 //advance Z80 core to the start of an instruction
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
575 while (!z_context->pc)
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
576 {
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
577 sync_z80(gen, z_context->current_cycle + MCLKS_PER_Z80);
1440
7d4483944d4d Allow actually saving a save state in more Z80 states. Save busreq/reset state in bus arbiter section for "native" save states
Michael Pavone <pavone@retrodev.com>
parents: 1433
diff changeset
578 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
579 }
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
580 #endif
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
581 char *save_path = slot >= SERIALIZE_SLOT ? NULL : get_slot_name(&gen->header, slot, use_native_states ? "state" : "gst");
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
582 if (use_native_states || slot >= SERIALIZE_SLOT) {
1428
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
583 serialize_buffer state;
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
584 init_serialize(&state);
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
585 genesis_serialize(gen, &state, address, slot != EVENTLOG_SLOT);
1690
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
586 if (slot == SERIALIZE_SLOT) {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
587 gen->serialize_tmp = state.data;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
588 gen->serialize_size = state.size;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
589 context->sync_cycle = context->current_cycle;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
590 context->should_return = 1;
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
591 } else if (slot == EVENTLOG_SLOT) {
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
592 event_state(context->current_cycle, &state);
1690
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
593 } else {
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
594 save_to_file(&state, save_path);
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
595 free(state.data);
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
596 }
1428
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
597 } else {
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
598 save_gst(gen, save_path, address);
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
599 }
1849
6b5147f08846 Don't print out a message when saving a state to the serialization pseudo-slot
Michael Pavone <pavone@retrodev.com>
parents: 1848
diff changeset
600 if (slot != SERIALIZE_SLOT) {
6b5147f08846 Don't print out a message when saving a state to the serialization pseudo-slot
Michael Pavone <pavone@retrodev.com>
parents: 1848
diff changeset
601 debug_message("Saved state to %s\n", save_path);
6b5147f08846 Don't print out a message when saving a state to the serialization pseudo-slot
Michael Pavone <pavone@retrodev.com>
parents: 1848
diff changeset
602 }
1478
da1dce39e846 Refactored save slot related logic to reduce duplication and allow reuse in new UI. Get state loading/saving mostly working in new UI
Michael Pavone <pavone@retrodev.com>
parents: 1471
diff changeset
603 free(save_path);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
604 } else if(gen->header.save_state) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
605 context->sync_cycle = context->current_cycle + 1;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
606 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
607 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
608 gen->last_sync_cycle = context->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
609 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
610 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
611
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
612 static m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
613 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
614 if (vdp_port & 0x2700E0) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
615 fatal_error("machine freeze due to write to address %X\n", 0xC00000 | vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
616 }
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
617 genesis_context * gen = context->system;
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
618 if (!gen->vdp_unlocked) {
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
619 fatal_error("machine freeze due to VDP write to %X without TMSS unlock\n", 0xC00000 | vdp_port);
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
620 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
621 vdp_port &= 0x1F;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
622 //printf("vdp_port write: %X, value: %X, cycle: %d\n", vdp_port, value, context->current_cycle);
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
623
1372
d78ef6f4fba2 Attempt at improving refresh emulation
Michael Pavone <pavone@retrodev.com>
parents: 1371
diff changeset
624 //do refresh check here so we can avoid adding a penalty for a refresh that happens during a VDP access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
625 gen->refresh_counter += context->current_cycle - 4*MCLKS_PER_68K - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
626 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
627 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
628 gen->last_sync_cycle = context->current_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
629
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
630 sync_components(context, 0);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
631 vdp_context *v_context = gen->vdp;
1374
8f404b1fa572 Go back to resetting the refresh counter after a DMA. Probably not quite correct as it is probably reset on VDP triggered refresh, but this is close enough for now given the general limitations with my refresh code. VDP FIFO Testing seems to be passing 100% reliably again (was occassionally failing still with the last commit)
Michael Pavone <pavone@retrodev.com>
parents: 1373
diff changeset
632 uint32_t before_cycle = v_context->cycles;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
633 if (vdp_port < 0x10) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
634 int blocked;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
635 if (vdp_port < 4) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
636 while (vdp_data_port_write(v_context, value) < 0) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
637 while(v_context->flags & FLAG_DMA_RUN) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
638 vdp_run_dma_done(v_context, gen->frame_end);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
639 if (v_context->cycles >= gen->frame_end) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
640 uint32_t cycle_diff = v_context->cycles - context->current_cycle;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
641 uint32_t m68k_cycle_diff = (cycle_diff / MCLKS_PER_68K) * MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
642 if (m68k_cycle_diff < cycle_diff) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
643 m68k_cycle_diff += MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
644 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
645 context->current_cycle += m68k_cycle_diff;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
646 gen->bus_busy = 1;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
647 sync_components(context, 0);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
648 gen->bus_busy = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
649 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
650 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
651 //context->current_cycle = v_context->cycles;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
652 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
653 } else if(vdp_port < 8) {
1371
5b20840711c1 Remove HINT_FUDGE and make a small adjustment to how VDP syncs with rest of system instead. Worse results on CRAM dot issue, but much less of a hack
Michael Pavone <pavone@retrodev.com>
parents: 1364
diff changeset
654 vdp_run_context_full(v_context, context->current_cycle);
1373
7cfc9d532e34 Fixed regression from VDP sync changes. Direct color DMA demos are now achieving stable sync again
Michael Pavone <pavone@retrodev.com>
parents: 1372
diff changeset
655 before_cycle = v_context->cycles;
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
656 blocked = vdp_control_port_write(v_context, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
657 if (blocked) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
658 while (blocked) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
659 while(v_context->flags & FLAG_DMA_RUN) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
660 vdp_run_dma_done(v_context, gen->frame_end);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
661 if (v_context->cycles >= gen->frame_end) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
662 uint32_t cycle_diff = v_context->cycles - context->current_cycle;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
663 uint32_t m68k_cycle_diff = (cycle_diff / MCLKS_PER_68K) * MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
664 if (m68k_cycle_diff < cycle_diff) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
665 m68k_cycle_diff += MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
666 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
667 context->current_cycle += m68k_cycle_diff;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
668 gen->bus_busy = 1;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
669 sync_components(context, 0);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
670 gen->bus_busy = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
671 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
672 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
673
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
674 if (blocked < 0) {
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
675 blocked = vdp_control_port_write(v_context, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
676 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
677 blocked = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
678 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
679 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
680 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
681 context->sync_cycle = gen->frame_end = vdp_cycles_to_frame_end(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
682 //printf("Set sync cycle to: %d @ %d, vcounter: %d, hslot: %d\n", context->sync_cycle, context->current_cycle, v_context->vcounter, v_context->hslot);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
683 adjust_int_cycle(context, v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
684 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
685 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
686 fatal_error("Illegal write to HV Counter port %X\n", vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
687 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
688 if (v_context->cycles != before_cycle) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
689 //printf("68K paused for %d (%d) cycles at cycle %d (%d) for write\n", v_context->cycles - context->current_cycle, v_context->cycles - before_cycle, context->current_cycle, before_cycle);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
690 uint32_t cycle_diff = v_context->cycles - context->current_cycle;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
691 uint32_t m68k_cycle_diff = (cycle_diff / MCLKS_PER_68K) * MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
692 if (m68k_cycle_diff < cycle_diff) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
693 m68k_cycle_diff += MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
694 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
695 context->current_cycle += m68k_cycle_diff;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
696 //Lock the Z80 out of the bus until the VDP access is complete
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
697 gen->bus_busy = 1;
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
698 sync_z80(gen, v_context->cycles);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
699 gen->bus_busy = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
700 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
701 } else if (vdp_port < 0x18) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
702 psg_write(gen->psg, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
703 } else {
1318
bfdd450e7dea Initial work on handling the 128KB VRAM mode bit and some basic prep work for VDP test register support
Michael Pavone <pavone@retrodev.com>
parents: 1316
diff changeset
704 vdp_test_port_write(gen->vdp, value);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
705 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
706
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
707 gen->last_sync_cycle -= 4 * MCLKS_PER_68K;
1372
d78ef6f4fba2 Attempt at improving refresh emulation
Michael Pavone <pavone@retrodev.com>
parents: 1371
diff changeset
708 //refresh may have happened while we were waiting on the VDP,
d78ef6f4fba2 Attempt at improving refresh emulation
Michael Pavone <pavone@retrodev.com>
parents: 1371
diff changeset
709 //so advance refresh_counter but don't add any delays
1374
8f404b1fa572 Go back to resetting the refresh counter after a DMA. Probably not quite correct as it is probably reset on VDP triggered refresh, but this is close enough for now given the general limitations with my refresh code. VDP FIFO Testing seems to be passing 100% reliably again (was occassionally failing still with the last commit)
Michael Pavone <pavone@retrodev.com>
parents: 1373
diff changeset
710 if (vdp_port >= 4 && vdp_port < 8 && v_context->cycles != before_cycle) {
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
711 gen->refresh_counter = 0;
1374
8f404b1fa572 Go back to resetting the refresh counter after a DMA. Probably not quite correct as it is probably reset on VDP triggered refresh, but this is close enough for now given the general limitations with my refresh code. VDP FIFO Testing seems to be passing 100% reliably again (was occassionally failing still with the last commit)
Michael Pavone <pavone@retrodev.com>
parents: 1373
diff changeset
712 } else {
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
713 gen->refresh_counter += (context->current_cycle - gen->last_sync_cycle);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
714 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
1374
8f404b1fa572 Go back to resetting the refresh counter after a DMA. Probably not quite correct as it is probably reset on VDP triggered refresh, but this is close enough for now given the general limitations with my refresh code. VDP FIFO Testing seems to be passing 100% reliably again (was occassionally failing still with the last commit)
Michael Pavone <pavone@retrodev.com>
parents: 1373
diff changeset
715 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
716 gen->last_sync_cycle = context->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
717 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
718 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
719
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
720 static m68k_context * vdp_port_write_b(uint32_t vdp_port, m68k_context * context, uint8_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
721 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
722 return vdp_port_write(vdp_port, context, vdp_port < 0x10 ? value | value << 8 : ((vdp_port & 1) ? value : 0));
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
723 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
724
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
725 static void * z80_vdp_port_write(uint32_t vdp_port, void * vcontext, uint8_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
726 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
727 z80_context * context = vcontext;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
728 genesis_context * gen = context->system;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
729 vdp_port &= 0xFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
730 if (vdp_port & 0xE0) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
731 fatal_error("machine freeze due to write to Z80 address %X\n", 0x7F00 | vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
732 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
733 if (vdp_port < 0x10) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
734 //These probably won't currently interact well with the 68K accessing the VDP
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
735 if (vdp_port < 4) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
736 vdp_run_context(gen->vdp, context->Z80_CYCLE);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
737 vdp_data_port_write(gen->vdp, value << 8 | value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
738 } else if (vdp_port < 8) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
739 vdp_run_context_full(gen->vdp, context->Z80_CYCLE);
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
740 vdp_control_port_write(gen->vdp, value << 8 | value, context->Z80_CYCLE);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
741 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
742 fatal_error("Illegal write to HV Counter port %X\n", vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
743 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
744 } else if (vdp_port < 0x18) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
745 sync_sound(gen, context->Z80_CYCLE);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
746 psg_write(gen->psg, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
747 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
748 vdp_test_port_write(gen->vdp, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
749 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
750 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
751 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
752
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
753 static uint16_t vdp_port_read(uint32_t vdp_port, m68k_context * context)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
754 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
755 if (vdp_port & 0x2700E0) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
756 fatal_error("machine freeze due to read from address %X\n", 0xC00000 | vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
757 }
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
758 genesis_context *gen = context->system;
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
759 if (!gen->vdp_unlocked) {
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
760 fatal_error("machine freeze due to VDP read from %X without TMSS unlock\n", 0xC00000 | vdp_port);
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
761 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
762 vdp_port &= 0x1F;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
763 uint16_t value;
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
764
1372
d78ef6f4fba2 Attempt at improving refresh emulation
Michael Pavone <pavone@retrodev.com>
parents: 1371
diff changeset
765 //do refresh check here so we can avoid adding a penalty for a refresh that happens during a VDP access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
766 gen->refresh_counter += context->current_cycle - 4*MCLKS_PER_68K - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
767 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
768 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
769 gen->last_sync_cycle = context->current_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
770
2021
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
771 sync_components(context, 0);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
772 vdp_context * v_context = gen->vdp;
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
773 uint32_t before_cycle = context->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
774 if (vdp_port < 0x10) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
775 if (vdp_port < 4) {
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
776 value = vdp_data_port_read(v_context, &context->current_cycle, MCLKS_PER_68K);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
777 } else if(vdp_port < 8) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
778 value = vdp_control_port_read(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
779 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
780 value = vdp_hv_counter_read(v_context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
781 //printf("HV Counter: %X at cycle %d\n", value, v_context->cycles);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
782 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
783 } else if (vdp_port < 0x18){
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
784 fatal_error("Illegal read from PSG port %X\n", vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
785 } else {
1869
dc94354eab66 Fix accuracy bugs used by Novedicus to detect BlastEm/Exodus
Michael Pavone <pavone@retrodev.com>
parents: 1849
diff changeset
786 value = get_open_bus_value(&gen->header);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
787 }
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
788 if (context->current_cycle != before_cycle) {
2021
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
789 //printf("68K paused for %d (%d) cycles at cycle %d (%d) for read\n", v_context->cycles - context->current_cycle, v_context->cycles - before_cycle, context->current_cycle, before_cycle);
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
790 //Lock the Z80 out of the bus until the VDP access is complete
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
791 genesis_context *gen = context->system;
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
792 gen->bus_busy = 1;
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
793 sync_z80(gen, context->current_cycle);
2021
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
794 gen->bus_busy = 0;
270a4c875e0a Backed out changeset 96971b673f51
Michael Pavone <pavone@retrodev.com>
parents: 2012
diff changeset
795 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
796
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
797 gen->last_sync_cycle -= 4 * MCLKS_PER_68K;
1372
d78ef6f4fba2 Attempt at improving refresh emulation
Michael Pavone <pavone@retrodev.com>
parents: 1371
diff changeset
798 //refresh may have happened while we were waiting on the VDP,
d78ef6f4fba2 Attempt at improving refresh emulation
Michael Pavone <pavone@retrodev.com>
parents: 1371
diff changeset
799 //so advance refresh_counter but don't add any delays
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
800 gen->refresh_counter += (context->current_cycle - gen->last_sync_cycle);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
801 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
802 gen->last_sync_cycle = context->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
803 return value;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
804 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
805
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
806 static uint8_t vdp_port_read_b(uint32_t vdp_port, m68k_context * context)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
807 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
808 uint16_t value = vdp_port_read(vdp_port, context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
809 if (vdp_port & 1) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
810 return value;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
811 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
812 return value >> 8;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
813 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
814 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
815
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
816 static uint8_t z80_vdp_port_read(uint32_t vdp_port, void * vcontext)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
817 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
818 z80_context * context = vcontext;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
819 if (vdp_port & 0xE0) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
820 fatal_error("machine freeze due to read from Z80 address %X\n", 0x7F00 | vdp_port);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
821 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
822 genesis_context * gen = context->system;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
823 //VDP access goes over the 68K bus like a bank area access
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
824 //typical delay from bus arbitration
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
825 context->Z80_CYCLE += 3 * MCLKS_PER_Z80;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
826 //TODO: add cycle for an access right after a previous one
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
827 //TODO: Below cycle time is an estimate based on the time between 68K !BG goes low and Z80 !MREQ goes high
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
828 // Needs a new logic analyzer capture to get the actual delay on the 68K side
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
829 gen->m68k->current_cycle += 8 * MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
830
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
831
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
832 vdp_port &= 0x1F;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
833 uint16_t ret;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
834 if (vdp_port < 0x10) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
835 //These probably won't currently interact well with the 68K accessing the VDP
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
836 vdp_run_context(gen->vdp, context->Z80_CYCLE);
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
837 uint32_t before = context->Z80_CYCLE;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
838 if (vdp_port < 4) {
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
839 ret = vdp_data_port_read(gen->vdp, &context->Z80_CYCLE, MCLKS_PER_Z80);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
840 } else if (vdp_port < 8) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
841 ret = vdp_control_port_read(gen->vdp);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
842 } else {
1316
3185438e0134 Fix copy pasta error in handling of Z80 VDP port reads. HV counter reads are not illegal writes =P. Fixes immediate exit in Overdrive II, though other problems remain
Michael Pavone <pavone@retrodev.com>
parents: 1309
diff changeset
843 ret = vdp_hv_counter_read(gen->vdp);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
844 }
2227
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
845 if (context->Z80_CYCLE != before) {
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
846 gen->m68k->current_cycle += context->Z80_CYCLE - before;
eaaf28af3c94 Implement VDP read latency and invalid write delays revealed by Ti_'s instruction timing ROM
Michael Pavone <pavone@retrodev.com>
parents: 2194
diff changeset
847 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
848 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
849 //TODO: Figure out the correct value today
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
850 ret = 0xFFFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
851 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
852 return vdp_port & 1 ? ret : ret >> 8;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
853 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
854
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
855 //TODO: Move this inside the system context
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
856 static uint32_t zram_counter = 0;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
857
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
858 static m68k_context * io_write(uint32_t location, m68k_context * context, uint8_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
859 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
860 genesis_context * gen = context->system;
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
861
2012
b05295c2ad04 Small improvement to refresh cycle approximation
Mike Pavone <pavone@retrodev.com>
parents: 1998
diff changeset
862 //do refresh check here so we can avoid adding a penalty for a refresh that happens during an IO area access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
863 gen->refresh_counter += context->current_cycle - 4*MCLKS_PER_68K - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
864 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
865 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
866 gen->last_sync_cycle = context->current_cycle - 4*MCLKS_PER_68K;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
867
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
868 if (location < 0x10000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
869 //Access to Z80 memory incurs a one 68K cycle wait state
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
870 context->current_cycle += MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
871 if (!z80_enabled || z80_get_busack(gen->z80, context->current_cycle)) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
872 location &= 0x7FFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
873 if (location < 0x4000) {
1104
4224980a5f84 Fix the previous WIP commit. Quick tests suggests things are no more broken than before now.
Michael Pavone <pavone@retrodev.com>
parents: 1103
diff changeset
874 gen->zram[location & 0x1FFF] = value;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
875 #ifndef NO_Z80
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
876 z80_handle_code_write(location & 0x1FFF, gen->z80);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
877 #endif
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
878 } else if (location < 0x6000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
879 sync_sound(gen, context->current_cycle);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
880 if (location & 1) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
881 ym_data_write(gen->ym, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
882 } else if(location & 2) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
883 ym_address_write_part2(gen->ym, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
884 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
885 ym_address_write_part1(gen->ym, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
886 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
887 } else if (location == 0x6000) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
888 gen->z80_bank_reg = (gen->z80_bank_reg >> 1 | value << 8) & 0x1FF;
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
889 if (gen->z80_bank_reg < 0x80) {
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
890 gen->z80->mem_pointers[1] = (gen->z80_bank_reg << 15) + ((char *)gen->z80->mem_pointers[2]);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
891 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
892 gen->z80->mem_pointers[1] = NULL;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
893 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
894 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
895 fatal_error("68K write to unhandled Z80 address %X\n", location);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
896 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
897 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
898 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
899 if (location < 0x10100) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
900 switch(location >> 1 & 0xFF)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
901 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
902 case 0x1:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
903 io_data_write(gen->io.ports, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
904 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
905 case 0x2:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
906 io_data_write(gen->io.ports+1, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
907 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
908 case 0x3:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
909 io_data_write(gen->io.ports+2, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
910 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
911 case 0x4:
1348
040c5600e2d9 Implemented slow rise time of IO pins set as inputs, but not driven by device. Fixes input in Decap Attack and possibly other games with buggy controller code
Michael Pavone <pavone@retrodev.com>
parents: 1333
diff changeset
912 io_control_write(gen->io.ports, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
913 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
914 case 0x5:
1348
040c5600e2d9 Implemented slow rise time of IO pins set as inputs, but not driven by device. Fixes input in Decap Attack and possibly other games with buggy controller code
Michael Pavone <pavone@retrodev.com>
parents: 1333
diff changeset
915 io_control_write(gen->io.ports+1, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
916 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
917 case 0x6:
1348
040c5600e2d9 Implemented slow rise time of IO pins set as inputs, but not driven by device. Fixes input in Decap Attack and possibly other games with buggy controller code
Michael Pavone <pavone@retrodev.com>
parents: 1333
diff changeset
918 io_control_write(gen->io.ports+2, value, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
919 break;
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
920 case 0x7:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
921 io_tx_write(gen->io.ports, value, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
922 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
923 case 0x8:
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
924 case 0xB:
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
925 case 0xE:
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
926 //serial input port is not writeable
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
927 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
928 case 0x9:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
929 io_sctrl_write(gen->io.ports, value, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
930 gen->io.ports[0].serial_ctrl = value;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
931 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
932 case 0xA:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
933 io_tx_write(gen->io.ports + 1, value, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
934 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
935 case 0xC:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
936 io_sctrl_write(gen->io.ports + 1, value, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
937 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
938 case 0xD:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
939 io_tx_write(gen->io.ports + 2, value, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
940 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
941 case 0xF:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
942 io_sctrl_write(gen->io.ports + 2, value, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
943 break;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
944 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
945 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
946 uint32_t masked = location & 0xFFF00;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
947 if (masked == 0x11100) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
948 if (value & 1) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
949 dputs("bus requesting Z80");
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
950 if (z80_enabled) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
951 z80_assert_busreq(gen->z80, context->current_cycle);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
952 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
953 gen->z80->busack = 1;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
954 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
955 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
956 if (gen->z80->busreq) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
957 dputs("releasing z80 bus");
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
958 #ifdef DO_DEBUG_PRINT
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
959 char fname[20];
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
960 sprintf(fname, "zram-%d", zram_counter++);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
961 FILE * f = fopen(fname, "wb");
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
962 fwrite(z80_ram, 1, sizeof(z80_ram), f);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
963 fclose(f);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
964 #endif
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
965 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
966 if (z80_enabled) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
967 z80_clear_busreq(gen->z80, context->current_cycle);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
968 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
969 gen->z80->busack = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
970 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
971 }
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
972 } else if (masked == 0x11200) {
2184
408fb8a7e990 Implement argumentless variant of z80 debugger command
Michael Pavone <pavone@retrodev.com>
parents: 2179
diff changeset
973 sync_z80(gen, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
974 if (value & 1) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
975 if (z80_enabled) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
976 z80_clear_reset(gen->z80, context->current_cycle);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
977 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
978 gen->z80->reset = 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
979 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
980 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
981 if (z80_enabled) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
982 z80_assert_reset(gen->z80, context->current_cycle);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
983 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
984 gen->z80->reset = 1;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
985 }
1308
1b3fe6e03e7b Reset YM2612 whenver the Z80 is reset. Fixes issue with stuck notes in Fantastic Dizzy and Kid Chameleon
Michael Pavone <pavone@retrodev.com>
parents: 1304
diff changeset
986 ym_reset(gen->ym);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
987 }
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
988 } else if (masked != 0x11300 && masked != 0x11000) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
989 fatal_error("Machine freeze due to unmapped write to address %X\n", location | 0xA00000);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
990 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
991 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
992 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
993
2012
b05295c2ad04 Small improvement to refresh cycle approximation
Mike Pavone <pavone@retrodev.com>
parents: 1998
diff changeset
994 //no refresh delays during IO access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
995 gen->refresh_counter += context->current_cycle - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
996 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
997 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
998 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
999
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1000 static m68k_context * io_write_w(uint32_t location, m68k_context * context, uint16_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1001 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1002 if (location < 0x10000 || (location & 0x1FFF) >= 0x100) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1003 return io_write(location, context, value >> 8);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1004 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1005 return io_write(location, context, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1006 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1007 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1008
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1009 #define FOREIGN 0x80
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1010 #define HZ50 0x40
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1011 #define USA FOREIGN
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1012 #define JAP 0x00
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1013 #define EUR (HZ50|FOREIGN)
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1014 #define NO_DISK 0x20
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1015
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1016 static uint8_t io_read(uint32_t location, m68k_context * context)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1017 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1018 uint8_t value;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1019 genesis_context *gen = context->system;
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1020
2012
b05295c2ad04 Small improvement to refresh cycle approximation
Mike Pavone <pavone@retrodev.com>
parents: 1998
diff changeset
1021 //do refresh check here so we can avoid adding a penalty for a refresh that happens during an IO area access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1022 gen->refresh_counter += context->current_cycle - 4*MCLKS_PER_68K - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1023 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1024 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1025 gen->last_sync_cycle = context->current_cycle - 4*MCLKS_PER_68K;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1026
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1027 if (location < 0x10000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1028 //Access to Z80 memory incurs a one 68K cycle wait state
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1029 context->current_cycle += MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1030 if (!z80_enabled || z80_get_busack(gen->z80, context->current_cycle)) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1031 location &= 0x7FFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1032 if (location < 0x4000) {
1104
4224980a5f84 Fix the previous WIP commit. Quick tests suggests things are no more broken than before now.
Michael Pavone <pavone@retrodev.com>
parents: 1103
diff changeset
1033 value = gen->zram[location & 0x1FFF];
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1034 } else if (location < 0x6000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1035 sync_sound(gen, context->current_cycle);
1904
8312e574100a Implement selectable YM2612/YM3834 invalid status port behavior
Michael Pavone <pavone@retrodev.com>
parents: 1902
diff changeset
1036 value = ym_read_status(gen->ym, context->current_cycle, location);
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1037 } else if (location < 0x7F00) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1038 value = 0xFF;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1039 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1040 fatal_error("Machine freeze due to read of Z80 VDP memory window by 68K: %X\n", location | 0xA00000);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1041 value = 0xFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1042 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1043 } else {
1914
5b94e0e7c5a5 Reading from Z80 bus when Z80 is not bus requested should return open bus. Fixes regression in Metal Sonic Rebooted
Michael Pavone <pavone@retrodev.com>
parents: 1909
diff changeset
1044 uint16_t word = get_open_bus_value(&gen->header);
5b94e0e7c5a5 Reading from Z80 bus when Z80 is not bus requested should return open bus. Fixes regression in Metal Sonic Rebooted
Michael Pavone <pavone@retrodev.com>
parents: 1909
diff changeset
1045 value = location & 1 ? word : word >> 8;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1046 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1047 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1048 if (location < 0x10100) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1049 switch(location >> 1 & 0xFF)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1050 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1051 case 0x0:
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1052 //version bits should be 0 for now since we're not emulating TMSS
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1053 value = gen->version_reg;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1054 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1055 case 0x1:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1056 value = io_data_read(gen->io.ports, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1057 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1058 case 0x2:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1059 value = io_data_read(gen->io.ports+1, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1060 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1061 case 0x3:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1062 value = io_data_read(gen->io.ports+2, context->current_cycle);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1063 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1064 case 0x4:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1065 value = gen->io.ports[0].control;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1066 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1067 case 0x5:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1068 value = gen->io.ports[1].control;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1069 break;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1070 case 0x6:
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1071 value = gen->io.ports[2].control;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1072 break;
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1073 case 0x7:
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1074 value = gen->io.ports[0].serial_out;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1075 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1076 case 0x8:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
1077 value = io_rx_read(gen->io.ports, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1078 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1079 case 0x9:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
1080 value = io_sctrl_read(gen->io.ports, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1081 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1082 case 0xA:
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1083 value = gen->io.ports[1].serial_out;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1084 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1085 case 0xB:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
1086 value = io_rx_read(gen->io.ports + 1, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1087 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1088 case 0xC:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
1089 value = io_sctrl_read(gen->io.ports, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1090 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1091 case 0xD:
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1092 value = gen->io.ports[2].serial_out;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1093 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1094 case 0xE:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
1095 value = io_rx_read(gen->io.ports + 1, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1096 break;
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1097 case 0xF:
2025
e7a516f08cec Implement serial IO, a generic serial device type and external interrupts
Michael Pavone <pavone@retrodev.com>
parents: 2021
diff changeset
1098 value = io_sctrl_read(gen->io.ports, context->current_cycle);
1215
cf69a179aeaf Basic implementation of serial IO registers, but without actual serial IO support. Needed to run a certain software check cartridge that is floating around.
Michael Pavone <pavone@retrodev.com>
parents: 1208
diff changeset
1099 break;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1100 default:
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1101 value = get_open_bus_value(&gen->header) >> 8;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1102 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1103 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1104 uint32_t masked = location & 0xFFF00;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1105 if (masked == 0x11100) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1106 value = z80_enabled ? !z80_get_busack(gen->z80, context->current_cycle) : !gen->z80->busack;
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
1107 value |= (get_open_bus_value(&gen->header) >> 8) & 0xFE;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1108 dprintf("Byte read of BUSREQ returned %d @ %d (reset: %d)\n", value, context->current_cycle, gen->z80->reset);
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1109 } else if (masked == 0x11200) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1110 value = !gen->z80->reset;
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1111 } else if (masked == 0x11300 || masked == 0x11000) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1112 //A11300 is apparently completely unused
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1113 //A11000 is the memory control register which I am assuming is write only
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1114 value = get_open_bus_value(&gen->header) >> 8;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1115 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1116 location |= 0xA00000;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1117 fatal_error("Machine freeze due to read of unmapped IO location %X\n", location);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1118 value = 0xFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1119 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1120 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1121 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1122
2012
b05295c2ad04 Small improvement to refresh cycle approximation
Mike Pavone <pavone@retrodev.com>
parents: 1998
diff changeset
1123 //no refresh delays during IO access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1124 gen->refresh_counter += context->current_cycle - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1125 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1126 gen->last_sync_cycle = context->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1127 return value;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1128 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1129
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1130 static uint16_t io_read_w(uint32_t location, m68k_context * context)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1131 {
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
1132 genesis_context *gen = context->system;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1133 uint16_t value = io_read(location, context);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1134 if (location < 0x10000 || (location & 0x1FFF) < 0x100) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1135 value = value | (value << 8);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1136 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1137 value <<= 8;
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
1138 value |= get_open_bus_value(&gen->header) & 0xFF;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1139 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1140 return value;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1141 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1142
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1143 static void * z80_write_ym(uint32_t location, void * vcontext, uint8_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1144 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1145 z80_context * context = vcontext;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1146 genesis_context * gen = context->system;
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1147 sync_sound(gen, context->Z80_CYCLE);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1148 if (location & 1) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1149 ym_data_write(gen->ym, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1150 } else if (location & 2) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1151 ym_address_write_part2(gen->ym, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1152 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1153 ym_address_write_part1(gen->ym, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1154 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1155 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1156 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1157
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1158 static uint8_t z80_read_ym(uint32_t location, void * vcontext)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1159 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1160 z80_context * context = vcontext;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1161 genesis_context * gen = context->system;
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1162 sync_sound(gen, context->Z80_CYCLE);
1904
8312e574100a Implement selectable YM2612/YM3834 invalid status port behavior
Michael Pavone <pavone@retrodev.com>
parents: 1902
diff changeset
1163 return ym_read_status(gen->ym, context->Z80_CYCLE, location);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1164 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1165
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1166 static uint8_t z80_read_bank(uint32_t location, void * vcontext)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1167 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1168 z80_context * context = vcontext;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1169 genesis_context *gen = context->system;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1170 if (gen->bus_busy) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1171 context->Z80_CYCLE = gen->m68k->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1172 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1173 //typical delay from bus arbitration
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1174 context->Z80_CYCLE += 3 * MCLKS_PER_Z80;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1175 //TODO: add cycle for an access right after a previous one
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1176 //TODO: Below cycle time is an estimate based on the time between 68K !BG goes low and Z80 !MREQ goes high
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1177 // Needs a new logic analyzer capture to get the actual delay on the 68K side
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1178 gen->m68k->current_cycle += 8 * MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1179
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1180 location &= 0x7FFF;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1181 if (context->mem_pointers[1]) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1182 return context->mem_pointers[1][location ^ 1];
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1183 }
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1184 uint32_t address = gen->z80_bank_reg << 15 | location;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1185 if (address >= 0xC00000 && address < 0xE00000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1186 return z80_vdp_port_read(location & 0xFF, context);
1869
dc94354eab66 Fix accuracy bugs used by Novedicus to detect BlastEm/Exodus
Michael Pavone <pavone@retrodev.com>
parents: 1849
diff changeset
1187 } else if (address >= 0xA10000 && address <= 0xA10001) {
dc94354eab66 Fix accuracy bugs used by Novedicus to detect BlastEm/Exodus
Michael Pavone <pavone@retrodev.com>
parents: 1849
diff changeset
1188 //Apparently version reg can be read through Z80 banked area
dc94354eab66 Fix accuracy bugs used by Novedicus to detect BlastEm/Exodus
Michael Pavone <pavone@retrodev.com>
parents: 1849
diff changeset
1189 //TODO: Check rest of IO region addresses
dc94354eab66 Fix accuracy bugs used by Novedicus to detect BlastEm/Exodus
Michael Pavone <pavone@retrodev.com>
parents: 1849
diff changeset
1190 return gen->version_reg;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1191 } else {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1192 fprintf(stderr, "Unhandled read by Z80 from address %X through banked memory area (%X)\n", address, gen->z80_bank_reg << 15);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1193 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1194 return 0;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1195 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1196
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1197 static void *z80_write_bank(uint32_t location, void * vcontext, uint8_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1198 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1199 z80_context * context = vcontext;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1200 genesis_context *gen = context->system;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1201 if (gen->bus_busy) {
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1202 context->Z80_CYCLE = gen->m68k->current_cycle;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1203 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1204 //typical delay from bus arbitration
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1205 context->Z80_CYCLE += 3 * MCLKS_PER_Z80;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1206 //TODO: add cycle for an access right after a previous one
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1207 //TODO: Below cycle time is an estimate based on the time between 68K !BG goes low and Z80 !MREQ goes high
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1208 // Needs a new logic analyzer capture to get the actual delay on the 68K side
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1209 gen->m68k->current_cycle += 8 * MCLKS_PER_68K;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1210
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1211 location &= 0x7FFF;
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1212 uint32_t address = gen->z80_bank_reg << 15 | location;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1213 if (address >= 0xE00000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1214 address &= 0xFFFF;
1104
4224980a5f84 Fix the previous WIP commit. Quick tests suggests things are no more broken than before now.
Michael Pavone <pavone@retrodev.com>
parents: 1103
diff changeset
1215 ((uint8_t *)gen->work_ram)[address ^ 1] = value;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1216 } else if (address >= 0xC00000) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1217 z80_vdp_port_write(location & 0xFF, context, value);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1218 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1219 fprintf(stderr, "Unhandled write by Z80 to address %X through banked memory area\n", address);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1220 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1221 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1222 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1223
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1224 static void *z80_write_bank_reg(uint32_t location, void * vcontext, uint8_t value)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1225 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1226 z80_context * context = vcontext;
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1227 genesis_context *gen = context->system;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1228
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1229 gen->z80_bank_reg = (gen->z80_bank_reg >> 1 | value << 8) & 0x1FF;
1445
349d50930c03 Save and restore Z80 bank register in native save states
Michael Pavone <pavone@retrodev.com>
parents: 1444
diff changeset
1230 update_z80_bank_pointer(context->system);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1231
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1232 return context;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1233 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1234
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1235 static uint16_t unused_read(uint32_t location, void *vcontext)
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1236 {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1237 m68k_context *context = vcontext;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1238 genesis_context *gen = context->system;
2228
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1239 if (location >= 0x800000) {
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1240 //do refresh check here so we can avoid adding a penalty for a refresh that happens during an IO area access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1241 gen->refresh_counter += context->current_cycle - 4*MCLKS_PER_68K - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1242 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1243 gen->refresh_counter += 4*MCLKS_PER_68K;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1244 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1245 gen->last_sync_cycle = context->current_cycle;
2228
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1246 }
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1247
1987
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1248 if (location < 0x800000 || (location >= 0xA13000 && location < 0xA13100) || (location >= 0xA12000 && location < 0xA12100)) {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1249 //Only called if the cart/exp doesn't have a more specific handler for this region
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1250 return get_open_bus_value(&gen->header);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1251 } else if (location == 0xA14000 || location == 0xA14002) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1252 if (gen->version_reg & 0xF) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1253 return gen->tmss_lock[location >> 1 & 1];
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1254 } else {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1255 fatal_error("Machine freeze due to read from TMSS lock when TMSS is not present %X\n", location);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1256 return 0xFFFF;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1257 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1258 } else if (location == 0xA14100) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1259 if (gen->version_reg & 0xF) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1260 return get_open_bus_value(&gen->header);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1261 } else {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1262 fatal_error("Machine freeze due to read from TMSS control when TMSS is not present %X\n", location);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1263 return 0xFFFF;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1264 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1265 } else {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1266 fatal_error("Machine freeze due to unmapped read from %X\n", location);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1267 return 0xFFFF;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1268 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1269 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1270
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1271 static uint8_t unused_read_b(uint32_t location, void *vcontext)
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1272 {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1273 uint16_t v = unused_read(location & 0xFFFFFE, vcontext);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1274 if (location & 1) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1275 return v;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1276 } else {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1277 return v >> 8;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1278 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1279 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1280
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1281 static void check_tmss_lock(genesis_context *gen)
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1282 {
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1283 gen->vdp_unlocked = gen->tmss_lock[0] == 0x5345 && gen->tmss_lock[1] == 0x4741;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1284 }
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1285
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1286 static void toggle_tmss_rom(genesis_context *gen)
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1287 {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1288 m68k_context *context = gen->m68k;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1289 for (int i = 0; i < NUM_MEM_AREAS; i++)
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1290 {
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1291 uint16_t *tmp = context->mem_pointers[i];
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1292 context->mem_pointers[i] = gen->tmss_pointers[i];
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1293 gen->tmss_pointers[i] = tmp;
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1294 }
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1295 m68k_invalidate_code_range(context, 0, 0x400000);
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1296 }
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1297
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1298 static void *unused_write(uint32_t location, void *vcontext, uint16_t value)
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1299 {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1300 m68k_context *context = vcontext;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1301 genesis_context *gen = context->system;
2228
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1302 if (location >= 0x800000) {
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1303 //do refresh check here so we can avoid adding a penalty for a refresh that happens during an IO area access
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1304 gen->refresh_counter += context->current_cycle - 4*MCLKS_PER_68K - gen->last_sync_cycle;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1305 context->current_cycle += REFRESH_DELAY * MCLKS_PER_68K * (gen->refresh_counter / (MCLKS_PER_68K * REFRESH_INTERVAL));
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1306 gen->refresh_counter += 4*MCLKS_PER_68K;
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1307 gen->refresh_counter = gen->refresh_counter % (MCLKS_PER_68K * REFRESH_INTERVAL);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1308 gen->last_sync_cycle = context->current_cycle;
2228
0db9dc6a9020 Some minor refresh emulation improvements
Michael Pavone <pavone@retrodev.com>
parents: 2227
diff changeset
1309 }
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1310
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1311 uint8_t has_tmss = gen->version_reg & 0xF;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1312 if (has_tmss && (location == 0xA14000 || location == 0xA14002)) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1313 gen->tmss_lock[location >> 1 & 1] = value;
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1314 check_tmss_lock(gen);
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1315 } else if (has_tmss && location == 0xA14100) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1316 value &= 1;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1317 if (gen->tmss != value) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1318 gen->tmss = value;
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1319 toggle_tmss_rom(gen);
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1320 }
1987
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1321 } else if (location < 0x800000 || (location >= 0xA13000 && location < 0xA13100) || (location >= 0xA12000 && location < 0xA12100)) {
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1322 //these writes are ignored when no relevant hardware is present
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1323 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1324 fatal_error("Machine freeze due to unmapped write to %X\n", location);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1325 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1326 return vcontext;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1327 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1328
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1329 static void *unused_write_b(uint32_t location, void *vcontext, uint8_t value)
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1330 {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1331 m68k_context *context = vcontext;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1332 genesis_context *gen = context->system;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1333 uint8_t has_tmss = gen->version_reg & 0xF;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1334 if (has_tmss && location >= 0xA14000 && location <= 0xA14003) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1335 uint32_t offset = location >> 1 & 1;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1336 if (location & 1) {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1337 gen->tmss_lock[offset] &= 0xFF00;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1338 gen->tmss_lock[offset] |= value;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1339 } else {
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1340 gen->tmss_lock[offset] &= 0xFF;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1341 gen->tmss_lock[offset] |= value << 8;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1342 }
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1343 check_tmss_lock(gen);
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1344 } else if (has_tmss && (location == 0xA14100 || location == 0xA14101)) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1345 if (location & 1) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1346 value &= 1;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1347 if (gen->tmss != value) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1348 gen->tmss = value;
2039
3b8e29ef1145 Add TMSS state to save states
Michael Pavone <pavone@retrodev.com>
parents: 2037
diff changeset
1349 toggle_tmss_rom(gen);
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1350 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1351 }
1987
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1352 } else if (location < 0x800000 || (location >= 0xA13000 && location < 0xA13100) || (location >= 0xA12000 && location < 0xA12100)) {
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1353 //these writes are ignored when no relevant hardware is present
71732f2f6f42 Fix handling of unmapped reads/writes to the cart/expansion port region
Mike Pavone <pavone@retrodev.com>
parents: 1980
diff changeset
1354 } else {
1907
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1355 fatal_error("Machine freeze due to unmapped byte write to %X\n", location);
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1356 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1357 return vcontext;
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1358 }
b021ca0bc375 Some partial work on TMSS registers, more accurate open bus locations and implement machine freezes for unmapped areas in the IO region
Michael Pavone <pavone@retrodev.com>
parents: 1906
diff changeset
1359
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1360 static void set_speed_percent(system_header * system, uint32_t percent)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1361 {
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1362 genesis_context *context = (genesis_context *)system;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1363 uint32_t old_clock = context->master_clock;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1364 context->master_clock = ((uint64_t)context->normal_clock * (uint64_t)percent) / 100;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1365 while (context->ym->current_cycle != context->psg->cycles) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1366 sync_sound(context, context->psg->cycles + MCLKS_PER_PSG);
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1367 }
2278
5a21bc0ec583 Implement turbo/slo mo for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2277
diff changeset
1368 if (context->expansion) {
5a21bc0ec583 Implement turbo/slo mo for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2277
diff changeset
1369 segacd_context *cd = context->expansion;
5a21bc0ec583 Implement turbo/slo mo for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2277
diff changeset
1370 segacd_set_speed_percent(cd, percent);
5a21bc0ec583 Implement turbo/slo mo for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2277
diff changeset
1371 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1372 ym_adjust_master_clock(context->ym, context->master_clock);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1373 psg_adjust_master_clock(context->psg, context->master_clock);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1374 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1375
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1376 void set_region(genesis_context *gen, rom_info *info, uint8_t region)
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1377 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1378 if (!region) {
1326
071e761bcdcf Fix a deficiency in the way types were handled in my ternary tree. Fixes in which some paths that were constructed from a template with variables would sometimes get an extra garbage character thrown in
Michael Pavone <pavone@retrodev.com>
parents: 1318
diff changeset
1379 char * def_region = tern_find_path_default(config, "system\0default_region\0", (tern_val){.ptrval = "U"}, TVAL_PTR).ptrval;
1204
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
1380 if (!info->regions || (info->regions & translate_region_char(toupper(*def_region)))) {
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1381 region = translate_region_char(toupper(*def_region));
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1382 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1383 region = info->regions;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1384 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1385 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1386 if (region & REGION_E) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1387 gen->version_reg = NO_DISK | EUR;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1388 } else if (region & REGION_J) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1389 gen->version_reg = NO_DISK | JAP;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1390 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1391 gen->version_reg = NO_DISK | USA;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1392 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1393
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1394 if (region & HZ50) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1395 gen->normal_clock = MCLKS_PAL;
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
1396 gen->soft_flush_cycles = MCLKS_LINE * 262 / 3 + 2;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1397 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1398 gen->normal_clock = MCLKS_NTSC;
1971
80920c21bb52 Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
Michael Pavone <pavone@retrodev.com>
parents: 1954
diff changeset
1399 gen->soft_flush_cycles = MCLKS_LINE * 313 / 3 + 2;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1400 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1401 gen->master_clock = gen->normal_clock;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1402 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1403
1433
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1404 static uint8_t load_state(system_header *system, uint8_t slot)
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1405 {
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1406 genesis_context *gen = (genesis_context *)system;
1479
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1407 char *statepath = get_slot_name(system, slot, "state");
1433
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1408 deserialize_buffer state;
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1409 uint32_t pc = 0;
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1410 uint8_t ret;
1479
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1411 if (!gen->m68k->resume_pc) {
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1412 system->delayed_load_slot = slot + 1;
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1413 gen->m68k->should_return = 1;
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1414 ret = get_modification_time(statepath) != 0;
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1415 if (!ret) {
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1416 strcpy(statepath + strlen(statepath)-strlen("state"), "gst");
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1417 ret = get_modification_time(statepath) != 0;
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1418 }
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1419 goto done;
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1420 }
1433
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1421 if (load_from_file(&state, statepath)) {
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1422 genesis_deserialize(&state, gen);
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1423 free(state.data);
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1424 ret = 1;
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1425 } else {
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1426 strcpy(statepath + strlen(statepath)-strlen("state"), "gst");
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1427 pc = load_gst(gen, statepath);
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1428 ret = pc != 0;
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1429 }
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1430 if (ret) {
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2278
diff changeset
1431 debug_message("Loaded state from %s\n", statepath);
1433
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1432 }
1479
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1433 done:
1433
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1434 free(statepath);
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1435 return ret;
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1436 }
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1437
1479
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1438 static void handle_reset_requests(genesis_context *gen)
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1439 {
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1440 while (gen->reset_requested || gen->header.delayed_load_slot)
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1441 {
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1442 if (gen->reset_requested) {
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1443 gen->reset_requested = 0;
1556
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1444 gen->m68k->should_return = 0;
1479
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1445 z80_assert_reset(gen->z80, gen->m68k->current_cycle);
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1446 z80_clear_busreq(gen->z80, gen->m68k->current_cycle);
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1447 ym_reset(gen->ym);
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1448 //Is there any sort of VDP reset?
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1449 m68k_reset(gen->m68k);
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1450 }
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1451 if (gen->header.delayed_load_slot) {
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1452 load_state(&gen->header, gen->header.delayed_load_slot - 1);
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1453 gen->header.delayed_load_slot = 0;
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1454 resume_68k(gen->m68k);
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1455 }
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1456 }
1980
81df9aa2de9b Less hacky run on audio thread mode
Michael Pavone <pavone@retrodev.com>
parents: 1971
diff changeset
1457 if (gen->header.force_release || render_should_release_on_exit()) {
1932
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1458 bindings_release_capture();
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1459 vdp_release_framebuffer(gen->vdp);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1460 render_pause_source(gen->ym->audio);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1461 render_pause_source(gen->psg->audio);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1462 }
1479
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1463 }
a568dca999b2 Fix genesis save state loading via Nuklear UI, sms probably still needs work
Michael Pavone <pavone@retrodev.com>
parents: 1478
diff changeset
1464
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1465 static void start_genesis(system_header *system, char *statefile)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1466 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1467 genesis_context *gen = (genesis_context *)system;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1468 if (statefile) {
1428
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1469 //first try loading as a native format savestate
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1470 deserialize_buffer state;
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1471 uint32_t pc;
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1472 if (load_from_file(&state, statefile)) {
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
1473 genesis_deserialize(&state, gen);
1428
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1474 free(state.data);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
1475 //HACK
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
1476 pc = gen->m68k->last_prefetch_address;
1428
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1477 } else {
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1478 pc = load_gst(gen, statefile);
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1479 if (!pc) {
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1480 fatal_error("Failed to load save state %s\n", statefile);
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
1481 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1482 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1483 printf("Loaded %s\n", statefile);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1484 if (gen->header.enter_debugger) {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1485 gen->header.enter_debugger = 0;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1486 insert_breakpoint(gen->m68k, pc, gen->header.debugger_type == DEBUGGER_NATIVE ? debugger : gdb_debug_enter);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1487 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1488 adjust_int_cycle(gen->m68k, gen->vdp);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1489 start_68k_context(gen->m68k, pc);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1490 } else {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1491 if (gen->header.enter_debugger) {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1492 gen->header.enter_debugger = 0;
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1493 uint32_t address = read_word(4, (void **)gen->m68k->mem_pointers, &gen->m68k->options->gen, gen->m68k) << 16
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1494 | read_word(6, (void **)gen->m68k->mem_pointers, &gen->m68k->options->gen, gen->m68k);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1495 insert_breakpoint(gen->m68k, address, gen->header.debugger_type == DEBUGGER_NATIVE ? debugger : gdb_debug_enter);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1496 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1497 m68k_reset(gen->m68k);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1498 }
1208
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1499 handle_reset_requests(gen);
1427
4e5797b3935a WIP - New savestate format
Michael Pavone <pavone@retrodev.com>
parents: 1420
diff changeset
1500 return;
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1501 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1502
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1503 static void resume_genesis(system_header *system)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1504 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1505 genesis_context *gen = (genesis_context *)system;
1980
81df9aa2de9b Less hacky run on audio thread mode
Michael Pavone <pavone@retrodev.com>
parents: 1971
diff changeset
1506 if (gen->header.force_release || render_should_release_on_exit()) {
81df9aa2de9b Less hacky run on audio thread mode
Michael Pavone <pavone@retrodev.com>
parents: 1971
diff changeset
1507 gen->header.force_release = 0;
1932
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1508 render_set_video_standard((gen->version_reg & HZ50) ? VID_PAL : VID_NTSC);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1509 bindings_reacquire_capture();
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1510 vdp_reacquire_framebuffer(gen->vdp);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1511 render_resume_source(gen->ym->audio);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1512 render_resume_source(gen->psg->audio);
b387f1c5a1d0 WIP new sync mode that runs emulation on audio thread
Michael Pavone <pavone@retrodev.com>
parents: 1927
diff changeset
1513 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1514 resume_68k(gen->m68k);
1208
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1515 handle_reset_requests(gen);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1516 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1517
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1518 static void inc_debug_mode(system_header *system)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1519 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1520 genesis_context *gen = (genesis_context *)system;
1631
c4ba3177b72d WIP new VDP plane debug view and support for detached VDP debug views generally
Michael Pavone <pavone@retrodev.com>
parents: 1610
diff changeset
1521 vdp_inc_debug_mode(gen->vdp);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1522 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1523
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1524 static void request_exit(system_header *system)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1525 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1526 genesis_context *gen = (genesis_context *)system;
1688
395f684c5379 Fixed the most glaring issues in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1643
diff changeset
1527 gen->m68k->target_cycle = gen->m68k->current_cycle;
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1528 gen->m68k->should_return = 1;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1529 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1530
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1531 static void persist_save(system_header *system)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1532 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1533 genesis_context *gen = (genesis_context *)system;
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1534 FILE *f;
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1535 if (gen->expansion) {
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1536 segacd_context *cd = gen->expansion;
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1537 char *bram_name = path_append(system->save_dir, "internal.bram");
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1538 f = fopen(bram_name, "wb");
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1539 if (f) {
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1540 fwrite(cd->bram, 1, 8 * 1024, f);
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1541 fclose(f);
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1542 printf("Saved internal BRAM to %s\n", bram_name);
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1543 }
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1544 free(bram_name);
2281
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1545 if (cd->bram_cart_id < 8) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1546 bram_name = path_append(system->save_dir, "cart.bram");
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1547 f = fopen(bram_name, "wb");
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1548 if (f) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1549 long configured_size = 0x2000 << cd->bram_cart_id;
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1550 fwrite(cd->bram_cart, 1, configured_size, f);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1551 fclose(f);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1552 printf("Saved BRAM cart to %s\n", bram_name);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1553 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1554 free(bram_name);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1555 }
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1556 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1557 if (gen->save_type == SAVE_NONE) {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1558 return;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1559 }
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1560 f = fopen(save_filename, "wb");
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1561 if (!f) {
1395
efa7225e0f07 Initial work to support parallel NOR flash and the Magistr 16
Michael Pavone <pavone@retrodev.com>
parents: 1377
diff changeset
1562 fprintf(stderr, "Failed to open %s file %s for writing\n", save_type_name(gen->save_type), save_filename);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1563 return;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1564 }
1848
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1565 if (gen->save_type == RAM_FLAG_BOTH) {
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1566 byteswap_rom(gen->save_size, (uint16_t *)gen->save_storage);
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1567 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1568 fwrite(gen->save_storage, 1, gen->save_size, f);
1848
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1569 if (gen->save_type == RAM_FLAG_BOTH) {
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1570 byteswap_rom(gen->save_size, (uint16_t *)gen->save_storage);
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1571 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1572 fclose(f);
1395
efa7225e0f07 Initial work to support parallel NOR flash and the Magistr 16
Michael Pavone <pavone@retrodev.com>
parents: 1377
diff changeset
1573 printf("Saved %s to %s\n", save_type_name(gen->save_type), save_filename);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1574 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1575
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1576 static void load_save(system_header *system)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1577 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1578 genesis_context *gen = (genesis_context *)system;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1579 FILE * f = fopen(save_filename, "rb");
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1580 if (f) {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1581 uint32_t read = fread(gen->save_storage, 1, gen->save_size, f);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1582 fclose(f);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1583 if (read > 0) {
1848
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1584 if (gen->save_type == RAM_FLAG_BOTH) {
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1585 byteswap_rom(gen->save_size, (uint16_t *)gen->save_storage);
ef3d368d59b0 16-bit wide save RAM is stored in memory byteswapped for performance reasons, but saving it to disc that way isn't great. Swap before save/after load to fix
Michael Pavone <pavone@retrodev.com>
parents: 1798
diff changeset
1586 }
1395
efa7225e0f07 Initial work to support parallel NOR flash and the Magistr 16
Michael Pavone <pavone@retrodev.com>
parents: 1377
diff changeset
1587 printf("Loaded %s from %s\n", save_type_name(gen->save_type), save_filename);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1588 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1589 }
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1590 if (gen->expansion) {
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1591 segacd_context *cd = gen->expansion;
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1592 char *bram_name = path_append(system->save_dir, "internal.bram");
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1593 f = fopen(bram_name, "rb");
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1594 if (f) {
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1595 uint32_t read = fread(cd->bram, 1, 8 * 1024, f);
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1596 fclose(f);
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1597 if (read > 0) {
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1598 printf("Loaded internal BRAM from %s\n", bram_name);
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1599 }
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1600 }
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1601 free(bram_name);
2281
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1602 bram_name = path_append(system->save_dir, "cart.bram");
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1603 f = fopen(bram_name, "rb");
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1604 if (f) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1605 long existing_size = nearest_pow2(file_size(f));
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1606 if (existing_size > 1 * 1024 * 1024) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1607 existing_size = 1 * 1024 * 1024;
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1608 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1609 long configured_size = 0x2000 << cd->bram_cart_id;
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1610 if (existing_size != configured_size) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1611 if (existing_size > configured_size) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1612 free(cd->bram_cart);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1613 cd->bram_cart = calloc(existing_size, 1);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1614 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1615 cd->bram_cart_id = 0;
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1616 while (existing_size > (0x2000 <<cd->bram_cart_id)) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1617 cd->bram_cart_id++;
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1618 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1619 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1620 uint32_t read = fread(cd->bram_cart, 1, existing_size, f);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1621 fclose(f);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1622 if (read > 0) {
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1623 printf("Loaded BRAM cart from %s\n", bram_name);
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1624 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1625 }
b9fed07f19e4 Implement BRAM cart support
Michael Pavone <pavone@retrodev.com>
parents: 2280
diff changeset
1626 free(bram_name);
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
1627 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1628 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1629
1208
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1630 static void soft_reset(system_header *system)
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1631 {
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1632 genesis_context *gen = (genesis_context *)system;
1556
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1633 if (gen->reset_cycle == CYCLE_NEVER) {
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1634 double random = (double)rand()/(double)RAND_MAX;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1635 gen->reset_cycle = gen->m68k->current_cycle + random * MCLKS_LINE * (gen->version_reg & HZ50 ? LINES_PAL : LINES_NTSC);
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1636 if (gen->reset_cycle < gen->m68k->target_cycle) {
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1637 gen->m68k->target_cycle = gen->reset_cycle;
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1638 }
075df0844baa Randomize soft reset timing and fix silly bug that was accidentally clearing IO state on soft reset
Michael Pavone <pavone@retrodev.com>
parents: 1555
diff changeset
1639 }
1208
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1640 }
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1641
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1642 static void free_genesis(system_header *system)
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1643 {
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1644 genesis_context *gen = (genesis_context *)system;
2164
4fbe1e7c4a73 Don't leak all Sega CD resources when freeing a Genesis instance
Michael Pavone <pavone@retrodev.com>
parents: 2150
diff changeset
1645 if (gen->expansion) {
4fbe1e7c4a73 Don't leak all Sega CD resources when freeing a Genesis instance
Michael Pavone <pavone@retrodev.com>
parents: 2150
diff changeset
1646 free_segacd(gen->expansion);
4fbe1e7c4a73 Don't leak all Sega CD resources when freeing a Genesis instance
Michael Pavone <pavone@retrodev.com>
parents: 2150
diff changeset
1647 }
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1648 vdp_free(gen->vdp);
1593
24508cb54f87 Fix a number of other memory errors (mostly leaks again) identified by valgrind
Michael Pavone <pavone@retrodev.com>
parents: 1592
diff changeset
1649 memmap_chunk *map = (memmap_chunk *)gen->m68k->options->gen.memmap;
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1650 m68k_options_free(gen->m68k->options);
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1651 free(gen->cart);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1652 free(gen->m68k);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1653 free(gen->work_ram);
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
1654 z80_options_free(gen->z80->Z80_OPTS);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1655 free(gen->z80);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1656 free(gen->zram);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1657 ym_free(gen->ym);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1658 psg_free(gen->psg);
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1659 free(gen->header.save_dir);
1595
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1660 free_rom_info(&gen->header.info);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1661 free(gen->lock_on);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1662 if (gen->save_type != SAVE_NONE && gen->mapper_type != MAPPER_SEGA_MED_V2) {
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1663 free(gen->save_storage);
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1664 }
2248
f7e2e11f1214 Fix improper free of memory map array from rom_info
Michael Pavone <pavone@retrodev.com>
parents: 2243
diff changeset
1665 free(map);
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
1666 free(gen);
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1667 }
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1668
1583
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1669 static void gamepad_down(system_header *system, uint8_t gamepad_num, uint8_t button)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1670 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1671 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1672 io_gamepad_down(&gen->io, gamepad_num, button);
1610
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
1673 if (gen->mapper_type == MAPPER_JCART) {
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
1674 jcart_gamepad_down(gen, gamepad_num, button);
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
1675 }
1583
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1676 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1677
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1678 static void gamepad_up(system_header *system, uint8_t gamepad_num, uint8_t button)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1679 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1680 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1681 io_gamepad_up(&gen->io, gamepad_num, button);
1610
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
1682 if (gen->mapper_type == MAPPER_JCART) {
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
1683 jcart_gamepad_up(gen, gamepad_num, button);
c206a422d466 Added J-Cart support
Michael Pavone <pavone@retrodev.com>
parents: 1595
diff changeset
1684 }
1583
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1685 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1686
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1687 static void mouse_down(system_header *system, uint8_t mouse_num, uint8_t button)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1688 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1689 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1690 io_mouse_down(&gen->io, mouse_num, button);
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1691 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1692
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1693 static void mouse_up(system_header *system, uint8_t mouse_num, uint8_t button)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1694 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1695 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1696 io_mouse_up(&gen->io, mouse_num, button);
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1697 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1698
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1699 static void mouse_motion_absolute(system_header *system, uint8_t mouse_num, uint16_t x, uint16_t y)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1700 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1701 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1702 io_mouse_motion_absolute(&gen->io, mouse_num, x, y);
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1703 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1704
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1705 static void mouse_motion_relative(system_header *system, uint8_t mouse_num, int32_t x, int32_t y)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1706 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1707 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1708 io_mouse_motion_relative(&gen->io, mouse_num, x, y);
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1709 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1710
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1711 static void keyboard_down(system_header *system, uint8_t scancode)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1712 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1713 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1714 io_keyboard_down(&gen->io, scancode);
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1715 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1716
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1717 static void keyboard_up(system_header *system, uint8_t scancode)
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1718 {
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1719 genesis_context *gen = (genesis_context *)system;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1720 io_keyboard_up(&gen->io, scancode);
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1721 }
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1722
1798
5278b6e44fc1 Optionally emulate the offset around zero in the imperfect DAC of a discrete YM2612
Michael Pavone <pavone@retrodev.com>
parents: 1796
diff changeset
1723 static void set_audio_config(genesis_context *gen)
1796
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1724 {
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1725 char *config_gain;
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1726 config_gain = tern_find_path(config, "audio\0psg_gain\0", TVAL_PTR).ptrval;
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1727 render_audio_source_gaindb(gen->psg->audio, config_gain ? atof(config_gain) : 0.0f);
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1728 config_gain = tern_find_path(config, "audio\0fm_gain\0", TVAL_PTR).ptrval;
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1729 render_audio_source_gaindb(gen->ym->audio, config_gain ? atof(config_gain) : 0.0f);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1730
1798
5278b6e44fc1 Optionally emulate the offset around zero in the imperfect DAC of a discrete YM2612
Michael Pavone <pavone@retrodev.com>
parents: 1796
diff changeset
1731 char *config_dac = tern_find_path_default(config, "audio\0fm_dac\0", (tern_val){.ptrval="zero_offset"}, TVAL_PTR).ptrval;
5278b6e44fc1 Optionally emulate the offset around zero in the imperfect DAC of a discrete YM2612
Michael Pavone <pavone@retrodev.com>
parents: 1796
diff changeset
1732 ym_enable_zero_offset(gen->ym, !strcmp(config_dac, "zero_offset"));
2277
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1733
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1734 if (gen->expansion) {
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1735 segacd_context *cd = gen->expansion;
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1736 config_gain = tern_find_path(config, "audio\0rf5c164_gain\0", TVAL_PTR).ptrval;
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1737 render_audio_source_gaindb(cd->pcm.audio, config_gain ? atof(config_gain) : -6.0f);
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1738 config_gain = tern_find_path(config, "audio\0cdda_gain\0", TVAL_PTR).ptrval;
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1739 render_audio_source_gaindb(cd->fader.audio, config_gain ? atof(config_gain) : -9.5f);
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
1740 }
1796
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1741 }
51417bb557b6 Configurable gain for overall output and individual components
Michael Pavone <pavone@retrodev.com>
parents: 1766
diff changeset
1742
1595
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1743 static void config_updated(system_header *system)
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1744 {
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1745 genesis_context *gen = (genesis_context *)system;
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1746 setup_io_devices(config, &system->info, &gen->io);
1798
5278b6e44fc1 Optionally emulate the offset around zero in the imperfect DAC of a discrete YM2612
Michael Pavone <pavone@retrodev.com>
parents: 1796
diff changeset
1747 set_audio_config(gen);
1595
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1748 }
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1749
1909
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1750 static void start_vgm_log(system_header *system, char *filename)
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1751 {
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1752 genesis_context *gen = (genesis_context *)system;
2254
8b88d57d1218 Prevent VGM logging from getting messed up if slow/turbo is active at log start time
Michael Pavone <pavone@retrodev.com>
parents: 2248
diff changeset
1753 vgm_writer *vgm = vgm_write_open(filename, gen->version_reg & HZ50 ? 50 : 60, gen->normal_clock, gen->m68k->current_cycle);
1909
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1754 if (vgm) {
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1755 printf("Started logging VGM to %s\n", filename);
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1756 sync_sound(gen, vgm->last_cycle);
2254
8b88d57d1218 Prevent VGM logging from getting messed up if slow/turbo is active at log start time
Michael Pavone <pavone@retrodev.com>
parents: 2248
diff changeset
1757 ym_vgm_log(gen->ym, gen->normal_clock, vgm);
8b88d57d1218 Prevent VGM logging from getting messed up if slow/turbo is active at log start time
Michael Pavone <pavone@retrodev.com>
parents: 2248
diff changeset
1758 psg_vgm_log(gen->psg, gen->normal_clock, vgm);
1909
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1759 gen->header.vgm_logging = 1;
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1760 } else {
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1761 printf("Failed to start logging to %s\n", filename);
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1762 }
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1763 }
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1764
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1765 static void stop_vgm_log(system_header *system)
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1766 {
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1767 puts("Stopped VGM log");
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1768 genesis_context *gen = (genesis_context *)system;
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1769 vgm_close(gen->ym->vgm);
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1770 gen->ym->vgm = gen->psg->vgm = NULL;
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1771 gen->header.vgm_logging = 0;
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1772 }
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1773
2243
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1774 static void toggle_debug_view(system_header *system, uint8_t debug_view)
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1775 {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1776 genesis_context *gen = (genesis_context *)system;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1777 if (debug_view < DEBUG_OSCILLOSCOPE) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1778 vdp_toggle_debug_view(gen->vdp, debug_view);
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1779 } else if (debug_view == DEBUG_OSCILLOSCOPE) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1780 if (gen->ym->scope) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1781 oscilloscope *scope = gen->ym->scope;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1782 gen->ym->scope = NULL;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1783 gen->psg->scope = NULL;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1784 if (gen->expansion) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1785 segacd_context *cd = gen->expansion;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1786 cd->pcm.scope = NULL;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1787 }
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1788 scope_close(scope);
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1789 } else {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1790 oscilloscope *scope = create_oscilloscope();
2255
74112041b2c7 Proper calculation of sample rate for YM2612/PSG oscilloscope view
Michael Pavone <pavone@retrodev.com>
parents: 2254
diff changeset
1791 ym_enable_scope(gen->ym, scope, gen->normal_clock);
74112041b2c7 Proper calculation of sample rate for YM2612/PSG oscilloscope view
Michael Pavone <pavone@retrodev.com>
parents: 2254
diff changeset
1792 psg_enable_scope(gen->psg, scope, gen->normal_clock);
2243
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1793 if (gen->expansion) {
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1794 segacd_context *cd = gen->expansion;
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1795 rf5c164_enable_scope(&cd->pcm, scope);
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1796 }
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1797 }
2271
3ef80963c2a7 Fix stamp address mask and add WIP CD graphics debug view
Michael Pavone <pavone@retrodev.com>
parents: 2267
diff changeset
1798 } else if (debug_view == DEBUG_CD_GRAPHICS && gen->expansion) {
3ef80963c2a7 Fix stamp address mask and add WIP CD graphics debug view
Michael Pavone <pavone@retrodev.com>
parents: 2267
diff changeset
1799 scd_toggle_graphics_debug(gen->expansion);
2243
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1800 }
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1801 }
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1802
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1803 static void *tmss_rom_write_16(uint32_t address, void *context, uint16_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1804 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1805 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1806 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1807 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1808 return gen->tmss_write_16(address, context, value);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1809 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1810
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1811 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1812 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1813
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1814 static void *tmss_rom_write_8(uint32_t address, void *context, uint8_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1815 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1816 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1817 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1818 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1819 return gen->tmss_write_8(address, context, value);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1820 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1821
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1822 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1823 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1824
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1825 static uint16_t tmss_rom_read_16(uint32_t address, void *context)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1826 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1827 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1828 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1829 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1830 return gen->tmss_read_16(address, context);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1831 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1832 return ((uint16_t *)gen->tmss_buffer)[address >> 1];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1833 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1834
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1835 static uint8_t tmss_rom_read_8(uint32_t address, void *context)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1836 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1837 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1838 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1839 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1840 return gen->tmss_read_8(address, context);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1841 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1842 #ifdef BLASTEM_BIG_ENDIAN
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1843 return gen->tmss_buffer[address];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1844 #else
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1845 return gen->tmss_buffer[address ^ 1];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1846 #endif
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1847 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1848
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1849 static void *tmss_word_write_16(uint32_t address, void *context, uint16_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1850 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1851 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1852 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1853 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1854 address += gen->tmss_write_offset;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1855 uint16_t *dest = get_native_pointer(address, (void **)m68k->mem_pointers, &m68k->options->gen);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1856 *dest = value;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1857 m68k_handle_code_write(address, m68k);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1858 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1859
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1860 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1861 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1862
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1863 static void *tmss_word_write_8(uint32_t address, void *context, uint8_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1864 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1865 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1866 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1867 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1868 address += gen->tmss_write_offset;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1869 uint8_t *dest = get_native_pointer(address & ~1, (void **)m68k->mem_pointers, &m68k->options->gen);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1870 #ifdef BLASTEM_BIG_ENDIAN
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1871 dest[address & 1] = value;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1872 #else
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1873 dest[address & 1 ^ 1] = value;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1874 #endif
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1875 m68k_handle_code_write(address & ~1, m68k);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1876 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1877
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1878 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1879 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1880
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1881 static void *tmss_odd_write_16(uint32_t address, void *context, uint16_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1882 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1883 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1884 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1885 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1886 memmap_chunk const *chunk = find_map_chunk(address + gen->tmss_write_offset, &m68k->options->gen, 0, NULL);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1887 address >>= 1;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1888 uint8_t *base = (uint8_t *)m68k->mem_pointers[chunk->ptr_index];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1889 base[address] = value;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1890 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1891 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1892 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1893
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1894 static void *tmss_odd_write_8(uint32_t address, void *context, uint8_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1895 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1896 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1897 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1898 if (gen->tmss && (address & 1)) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1899 memmap_chunk const *chunk = find_map_chunk(address + gen->tmss_write_offset, &m68k->options->gen, 0, NULL);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1900 address >>= 1;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1901 uint8_t *base = (uint8_t *)m68k->mem_pointers[chunk->ptr_index];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1902 base[address] = value;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1903 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1904 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1905 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1906
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1907 static void *tmss_even_write_16(uint32_t address, void *context, uint16_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1908 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1909 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1910 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1911 if (gen->tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1912 memmap_chunk const *chunk = find_map_chunk(address + gen->tmss_write_offset, &m68k->options->gen, 0, NULL);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1913 address >>= 1;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1914 uint8_t *base = (uint8_t *)m68k->mem_pointers[chunk->ptr_index];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1915 base[address] = value >> 8;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1916 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1917 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1918 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1919
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1920 static void *tmss_even_write_8(uint32_t address, void *context, uint8_t value)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1921 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1922 m68k_context *m68k = context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1923 genesis_context *gen = m68k->system;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1924 if (gen->tmss && !(address & 1)) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1925 memmap_chunk const *chunk = find_map_chunk(address + gen->tmss_write_offset, &m68k->options->gen, 0, NULL);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1926 address >>= 1;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1927 uint8_t *base = (uint8_t *)m68k->mem_pointers[chunk->ptr_index];
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1928 base[address] = value;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1929 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1930 return context;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1931 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
1932
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1933 static genesis_context *shared_init(uint32_t system_opts, rom_info *rom, uint8_t force_region)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1934 {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1935 static memmap_chunk z80_map[] = {
2134
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
1936 { 0x0000, 0x4000, 0x1FFF, .flags = MMAP_READ | MMAP_WRITE | MMAP_CODE},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
1937 { 0x8000, 0x10000, 0x7FFF, .read_8 = z80_read_bank, .write_8 = z80_write_bank},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
1938 { 0x4000, 0x6000, 0x0003, .read_8 = z80_read_ym, .write_8 = z80_write_ym},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
1939 { 0x6000, 0x6100, 0xFFFF, .write_8 = z80_write_bank_reg},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
1940 { 0x7F00, 0x8000, 0x00FF, .read_8 = z80_vdp_port_read, .write_8 = z80_vdp_port_write}
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1941 };
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
1942
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1943 char *m68k_divider = tern_find_path(config, "clocks\0m68k_divider\0", TVAL_PTR).ptrval;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1944 if (!m68k_divider) {
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1945 m68k_divider = "7";
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1946 }
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1947 MCLKS_PER_68K = atoi(m68k_divider);
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1948 if (!MCLKS_PER_68K) {
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1949 MCLKS_PER_68K = 7;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
1950 }
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
1951
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1952 genesis_context *gen = calloc(1, sizeof(genesis_context));
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1953 gen->header.set_speed_percent = set_speed_percent;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1954 gen->header.start_context = start_genesis;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1955 gen->header.resume_context = resume_genesis;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1956 gen->header.load_save = load_save;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1957 gen->header.persist_save = persist_save;
1433
c886c54d8cf1 Added save states to SMS emulation
Michael Pavone <pavone@retrodev.com>
parents: 1428
diff changeset
1958 gen->header.load_state = load_state;
1208
95f5253e75c7 Implement soft reset in Genesis mode
Michael Pavone <pavone@retrodev.com>
parents: 1204
diff changeset
1959 gen->header.soft_reset = soft_reset;
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1960 gen->header.free_context = free_genesis;
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
1961 gen->header.get_open_bus_value = get_open_bus_value;
1111
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1962 gen->header.request_exit = request_exit;
2eb54e24914e Mostly working changes to allow support for multiple emulated system types in main blastem program
Michael Pavone <pavone@retrodev.com>
parents: 1108
diff changeset
1963 gen->header.inc_debug_mode = inc_debug_mode;
1583
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1964 gen->header.gamepad_down = gamepad_down;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1965 gen->header.gamepad_up = gamepad_up;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1966 gen->header.mouse_down = mouse_down;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1967 gen->header.mouse_up = mouse_up;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1968 gen->header.mouse_motion_absolute = mouse_motion_absolute;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1969 gen->header.mouse_motion_relative = mouse_motion_relative;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1970 gen->header.keyboard_down = keyboard_down;
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
1971 gen->header.keyboard_up = keyboard_up;
1595
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1972 gen->header.config_updated = config_updated;
1690
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
1973 gen->header.serialize = serialize;
319d90025d50 Implement serialization/deserialization in libretro build
Mike Pavone <pavone@retrodev.com>
parents: 1688
diff changeset
1974 gen->header.deserialize = deserialize;
1909
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1975 gen->header.start_vgm_log = start_vgm_log;
508522f08e4d Initial stab at VGM logging support
Michael Pavone <pavone@retrodev.com>
parents: 1907
diff changeset
1976 gen->header.stop_vgm_log = stop_vgm_log;
2243
0d1d5dccdd28 Initial implementation of oscilloscope debug view
Michael Pavone <pavone@retrodev.com>
parents: 2228
diff changeset
1977 gen->header.toggle_debug_view = toggle_debug_view;
1377
e587f16e7d3d Implemented SMS pause button
Michael Pavone <pavone@retrodev.com>
parents: 1374
diff changeset
1978 gen->header.type = SYSTEM_GENESIS;
1595
360d5bab199f Update controller config when changed in UI without restart
Michael Pavone <pavone@retrodev.com>
parents: 1593
diff changeset
1979 gen->header.info = *rom;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1980 set_region(gen, rom, force_region);
1901
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
1981 tern_node *model = get_model(config, SYSTEM_GENESIS);
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
1982 uint8_t tmss = !strcmp(tern_find_ptr_default(model, "tmss", "off"), "on");
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
1983 if (tmss) {
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
1984 gen->version_reg |= 1;
2037
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1985 } else {
b0b0c31338c3 Implement TMSS VDP lock
Michael Pavone <pavone@retrodev.com>
parents: 2034
diff changeset
1986 gen->vdp_unlocked = 1;
1901
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
1987 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1988
1906
2d462aa78349 Make VDP VSRAM capacity respect model selection
Michael Pavone <pavone@retrodev.com>
parents: 1904
diff changeset
1989 uint8_t max_vsram = !strcmp(tern_find_ptr_default(model, "vsram", "40"), "64");
2194
01ff005b08f6 Very rudimentary support for Game Gear VDP emulation
Michael Pavone <pavone@retrodev.com>
parents: 2184
diff changeset
1990 gen->vdp = init_vdp_context(gen->version_reg & 0x40, max_vsram, VDP_GENESIS);
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
1991 gen->vdp->system = &gen->header;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1992 gen->frame_end = vdp_cycles_to_frame_end(gen->vdp);
1326
071e761bcdcf Fix a deficiency in the way types were handled in my ternary tree. Fixes in which some paths that were constructed from a template with variables would sometimes get an extra garbage character thrown in
Michael Pavone <pavone@retrodev.com>
parents: 1318
diff changeset
1993 char * config_cycles = tern_find_path(config, "clocks\0max_cycles\0", TVAL_PTR).ptrval;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1994 gen->max_cycles = config_cycles ? atoi(config_cycles) : DEFAULT_SYNC_INTERVAL;
1364
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
1995 gen->int_latency_prev1 = MCLKS_PER_68K * 32;
30123ca5856c Added some code to try and prevent Z80 accesses and refresh cycles from screwing up interrupt latency more than on hardware
Michael Pavone <pavone@retrodev.com>
parents: 1348
diff changeset
1996 gen->int_latency_prev2 = MCLKS_PER_68K * 16;
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
1997
1565
61fafcbc2c38 Audio DRC now sounds good in both NTSC and PAL, just need to adjust constants to minimize latency without leading to dropouts
Michael Pavone <pavone@retrodev.com>
parents: 1557
diff changeset
1998 render_set_video_standard((gen->version_reg & HZ50) ? VID_PAL : VID_NTSC);
1946
c3c62dbf1ceb WIP netplay support
Michael Pavone <pavone@retrodev.com>
parents: 1932
diff changeset
1999 event_system_start(SYSTEM_GENESIS, (gen->version_reg & HZ50) ? VID_PAL : VID_NTSC, rom->name);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
2000
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2001 gen->ym = malloc(sizeof(ym2612_context));
1904
8312e574100a Implement selectable YM2612/YM3834 invalid status port behavior
Michael Pavone <pavone@retrodev.com>
parents: 1902
diff changeset
2002 char *fm = tern_find_ptr_default(model, "fm", "discrete 2612");
8312e574100a Implement selectable YM2612/YM3834 invalid status port behavior
Michael Pavone <pavone@retrodev.com>
parents: 1902
diff changeset
2003 if (!strcmp(fm + strlen(fm) -4, "3834")) {
8312e574100a Implement selectable YM2612/YM3834 invalid status port behavior
Michael Pavone <pavone@retrodev.com>
parents: 1902
diff changeset
2004 system_opts |= YM_OPT_3834;
8312e574100a Implement selectable YM2612/YM3834 invalid status port behavior
Michael Pavone <pavone@retrodev.com>
parents: 1902
diff changeset
2005 }
1555
6ce36c3f250b More audio refactoring in preparation for allowing proper sync to video with dynamic audio rate control
Michael Pavone <pavone@retrodev.com>
parents: 1551
diff changeset
2006 ym_init(gen->ym, gen->master_clock, MCLKS_PER_YM, system_opts);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2007
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2008 gen->psg = malloc(sizeof(psg_context));
1555
6ce36c3f250b More audio refactoring in preparation for allowing proper sync to video with dynamic audio rate control
Michael Pavone <pavone@retrodev.com>
parents: 1551
diff changeset
2009 psg_init(gen->psg, gen->master_clock, MCLKS_PER_PSG);
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
2010
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2011 z80_map[0].buffer = gen->zram = calloc(1, Z80_RAM_BYTES);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2012 #ifndef NO_Z80
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2013 z80_options *z_opts = malloc(sizeof(z80_options));
1116
fe8c79f82c22 More cleanup in preparation for SMS/Mark III support
Michael Pavone <pavone@retrodev.com>
parents: 1113
diff changeset
2014 init_z80_opts(z_opts, z80_map, 5, NULL, 0, MCLKS_PER_Z80, 0xFFFF);
1130
8f14767661fa Remove memory map assumptions from Z80 core and move a little bit of logic to the generic backend.c so it can be shared between CPU cores
Michael Pavone <pavone@retrodev.com>
parents: 1117
diff changeset
2015 gen->z80 = init_z80_context(z_opts);
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
2016 #ifndef NEW_CORE
1117
928a65750345 Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Michael Pavone <pavone@retrodev.com>
parents: 1116
diff changeset
2017 gen->z80->next_int_pulse = z80_next_int_pulse;
1752
d6d4c006a7b3 Initial attempt at interrupts in new Z80 core and integrating it into main executable
Michael Pavone <pavone@retrodev.com>
parents: 1690
diff changeset
2018 #endif
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2019 z80_assert_reset(gen->z80, 0);
1130
8f14767661fa Remove memory map assumptions from Z80 core and move a little bit of logic to the generic backend.c so it can be shared between CPU cores
Michael Pavone <pavone@retrodev.com>
parents: 1117
diff changeset
2020 #else
8f14767661fa Remove memory map assumptions from Z80 core and move a little bit of logic to the generic backend.c so it can be shared between CPU cores
Michael Pavone <pavone@retrodev.com>
parents: 1117
diff changeset
2021 gen->z80 = calloc(1, sizeof(z80_context));
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2022 #endif
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2023
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2024 gen->z80->system = gen;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2025 gen->z80->mem_pointers[0] = gen->zram;
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2026 gen->z80->mem_pointers[1] = gen->z80->mem_pointers[2] = NULL;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2027
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2028 gen->work_ram = calloc(2, RAM_WORDS);
1326
071e761bcdcf Fix a deficiency in the way types were handled in my ternary tree. Fixes in which some paths that were constructed from a template with variables would sometimes get an extra garbage character thrown in
Michael Pavone <pavone@retrodev.com>
parents: 1318
diff changeset
2029 if (!strcmp("random", tern_find_path_default(config, "system\0ram_init\0", (tern_val){.ptrval = "zero"}, TVAL_PTR).ptrval))
1204
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2030 {
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2031 srand(time(NULL));
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2032 for (int i = 0; i < RAM_WORDS; i++)
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2033 {
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2034 gen->work_ram[i] = rand();
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2035 }
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2036 for (int i = 0; i < Z80_RAM_BYTES; i++)
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2037 {
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2038 gen->zram[i] = rand();
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2039 }
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2040 for (int i = 0; i < VRAM_SIZE; i++)
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2041 {
1333
69c25e1188e5 Small tweak to how SAT cache updates are done. Mostly fixes the rotating cube scene in Overdrive 2
Michael Pavone <pavone@retrodev.com>
parents: 1326
diff changeset
2042 gen->vdp->vdpmem[i] = rand();
69c25e1188e5 Small tweak to how SAT cache updates are done. Mostly fixes the rotating cube scene in Overdrive 2
Michael Pavone <pavone@retrodev.com>
parents: 1326
diff changeset
2043 }
69c25e1188e5 Small tweak to how SAT cache updates are done. Mostly fixes the rotating cube scene in Overdrive 2
Michael Pavone <pavone@retrodev.com>
parents: 1326
diff changeset
2044 for (int i = 0; i < SAT_CACHE_SIZE; i++)
69c25e1188e5 Small tweak to how SAT cache updates are done. Mostly fixes the rotating cube scene in Overdrive 2
Michael Pavone <pavone@retrodev.com>
parents: 1326
diff changeset
2045 {
69c25e1188e5 Small tweak to how SAT cache updates are done. Mostly fixes the rotating cube scene in Overdrive 2
Michael Pavone <pavone@retrodev.com>
parents: 1326
diff changeset
2046 gen->vdp->sat_cache[i] = rand();
1204
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2047 }
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2048 for (int i = 0; i < CRAM_SIZE; i++)
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2049 {
1428
2540c05520f2 New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
Michael Pavone <pavone@retrodev.com>
parents: 1427
diff changeset
2050 write_cram_internal(gen->vdp, i, rand());
1204
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2051 }
1906
2d462aa78349 Make VDP VSRAM capacity respect model selection
Michael Pavone <pavone@retrodev.com>
parents: 1904
diff changeset
2052 for (int i = 0; i < gen->vdp->vsram_size; i++)
1204
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2053 {
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2054 gen->vdp->vsram[i] = rand();
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2055 }
d7be5b6e0a8d Added config file option to specify that RAM should be randomly initialized. Moved default_region inside a new "system" parent node in config
Michael Pavone <pavone@retrodev.com>
parents: 1188
diff changeset
2056 }
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2057
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2058 return gen;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2059 }
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2060
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2061 static memmap_chunk base_map[] = {
2134
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2062 {0xE00000, 0x1000000, 0xFFFF, .flags = MMAP_READ | MMAP_WRITE | MMAP_CODE},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2063 {0xC00000, 0xE00000, 0x1FFFFF, .read_16 = (read_16_fun)vdp_port_read, .write_16 =(write_16_fun)vdp_port_write,
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2064 .read_8 = (read_8_fun)vdp_port_read_b, .write_8 = (write_8_fun)vdp_port_write_b},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2065 {0xA00000, 0xA12000, 0x1FFFF, .read_16 = (read_16_fun)io_read_w, .write_16 = (write_16_fun)io_write_w,
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2066 .read_8 = (read_8_fun)io_read, .write_8 = (write_8_fun)io_write},
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2067 {0x000000, 0xFFFFFF, 0xFFFFFF, .read_16 = (read_16_fun)unused_read, .write_16 = unused_write,
9caebcfeac72 Implement word RAM interleaving in 1M mode, now passes mcd-verificator word RAM tests
Michael Pavone <pavone@retrodev.com>
parents: 2090
diff changeset
2068 .read_8 = (read_8_fun)unused_read_b, .write_8 = (write_8_fun)unused_write_b}
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2069 };
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2070 const size_t base_chunks = sizeof(base_map)/sizeof(*base_map);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2071
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2072 genesis_context *alloc_config_genesis(void *rom, uint32_t rom_size, void *lock_on, uint32_t lock_on_size, uint32_t ym_opts, uint8_t force_region)
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2073 {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2074 tern_node *rom_db = get_rom_db();
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2075 rom_info info = configure_rom(rom_db, rom, rom_size, lock_on, lock_on_size, base_map, base_chunks);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2076 rom = info.rom;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2077 rom_size = info.rom_size;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2078 #ifndef BLASTEM_BIG_ENDIAN
2150
a418fa599b2e Add ROM DB entry to fix SRAM on Triple Play: Gold Edition and make some code changes so that 3MB dumps will work too
Michael Pavone <pavone@retrodev.com>
parents: 2134
diff changeset
2079 byteswap_rom(nearest_pow2(rom_size), rom);
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2080 if (lock_on) {
2150
a418fa599b2e Add ROM DB entry to fix SRAM on Triple Play: Gold Edition and make some code changes so that 3MB dumps will work too
Michael Pavone <pavone@retrodev.com>
parents: 2134
diff changeset
2081 byteswap_rom(nearest_pow2(lock_on_size), lock_on);
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2082 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2083 #endif
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2084 char *m68k_divider = tern_find_path(config, "clocks\0m68k_divider\0", TVAL_PTR).ptrval;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2085 if (!m68k_divider) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2086 m68k_divider = "7";
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2087 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2088 MCLKS_PER_68K = atoi(m68k_divider);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2089 if (!MCLKS_PER_68K) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2090 MCLKS_PER_68K = 7;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2091 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2092 genesis_context *gen = shared_init(ym_opts, &info, force_region);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2093 gen->z80->mem_pointers[1] = gen->z80->mem_pointers[2] = rom;
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2094
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2095 gen->cart = rom;
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2096 gen->lock_on = lock_on;
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2097
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2098 setup_io_devices(config, &info, &gen->io);
1583
430dd12e4010 Refactor to split device bindings from IO emulation code
Michael Pavone <pavone@retrodev.com>
parents: 1576
diff changeset
2099 gen->header.has_keyboard = io_has_keyboard(&gen->io);
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2100 gen->mapper_type = info.mapper_type;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2101 gen->save_type = info.save_type;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2102 if (gen->save_type != SAVE_NONE) {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2103 gen->save_ram_mask = info.save_mask;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2104 gen->save_size = info.save_size;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2105 gen->save_storage = info.save_buffer;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2106 gen->eeprom_map = info.eeprom_map;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2107 gen->num_eeprom = info.num_eeprom;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2108 if (gen->save_type == SAVE_I2C) {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2109 eeprom_init(&gen->eeprom, gen->save_storage, gen->save_size);
1395
efa7225e0f07 Initial work to support parallel NOR flash and the Magistr 16
Michael Pavone <pavone@retrodev.com>
parents: 1377
diff changeset
2110 } else if (gen->save_type == SAVE_NOR) {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2111 memcpy(&gen->nor, info.nor, sizeof(gen->nor));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2112 //nor_flash_init(&gen->nor, gen->save_storage, gen->save_size, info.save_page_size, info.save_product_id, info.save_bus);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2113 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2114 } else {
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2115 gen->save_storage = NULL;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2116 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
2117
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2118 gen->mapper_start_index = info.mapper_start_index;
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
2119
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2120 tern_node *model = get_model(config, SYSTEM_GENESIS);
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2121 uint8_t tmss = !strcmp(tern_find_ptr_default(model, "tmss", "off"), "on");
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2122
1165
9fc680b35dbb Fix crash regression for games with some kind of mapper functionality
Michael Pavone <pavone@retrodev.com>
parents: 1130
diff changeset
2123 //This must happen before we generate memory access functions in init_m68k_opts
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2124 uint8_t next_ptr_index = 0;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2125 uint32_t tmss_min_alloc = 16 * 1024;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2126 for (int i = 0; i < info.map_chunks; i++)
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2127 {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2128 if (info.map[i].start == 0xE00000) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2129 info.map[i].buffer = gen->work_ram;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2130 if (!tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2131 break;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2132 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2133 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2134 if (info.map[i].flags & MMAP_PTR_IDX && info.map[i].ptr_index >= next_ptr_index) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2135 next_ptr_index = info.map[i].ptr_index + 1;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2136 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2137 if (info.map[i].start < 0x400000 && info.map[i].read_16 != unused_read) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2138 uint32_t highest_offset = (info.map[i].end & info.map[i].mask) + 1;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2139 if (highest_offset > tmss_min_alloc) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2140 tmss_min_alloc = highest_offset;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2141 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2142 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2143 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2144 if (tmss) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2145 char *tmss_path = tern_find_path_default(config, "system\0tmss_path\0", (tern_val){.ptrval = "tmss.md"}, TVAL_PTR).ptrval;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2146 uint8_t *buffer = malloc(tmss_min_alloc);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2147 uint32_t tmss_size;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2148 if (is_absolute_path(tmss_path)) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2149 FILE *f = fopen(tmss_path, "rb");
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2150 if (!f) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2151 fatal_error("Configured to use a model with TMSS, but failed to load the TMSS ROM from %s\n", tmss_path);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2152 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2153 tmss_size = fread(buffer, 1, tmss_min_alloc, f);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2154 fclose(f);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2155 } else {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2156 char *tmp = read_bundled_file(tmss_path, &tmss_size);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2157 if (!tmp) {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2158 fatal_error("Configured to use a model with TMSS, but failed to load the TMSS ROM from %s\n", tmss_path);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2159 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2160 memcpy(buffer, tmp, tmss_size);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2161 free(tmp);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2162 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2163 for (uint32_t padded = nearest_pow2(tmss_size); tmss_size < padded; tmss_size++)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2164 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2165 buffer[tmss_size] = 0xFF;
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2166 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2167 #ifndef BLASTEM_BIG_ENDIAN
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2168 byteswap_rom(tmss_size, (uint16_t *)buffer);
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2169 #endif
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2170 //mirror TMSS ROM until we fill up to tmss_min_alloc
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2171 for (uint32_t dst = tmss_size; dst < tmss_min_alloc; dst += tmss_size)
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2172 {
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2173 memcpy(buffer + dst, buffer, dst + tmss_size > tmss_min_alloc ? tmss_min_alloc - dst : tmss_size);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2174 }
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2175 //modify mappings for ROM space to point to the TMSS ROM and fixup flags to allow switching back and forth
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2176 //WARNING: This code makes some pretty big assumptions about the kinds of map chunks it will encounter
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2177 for (int i = 0; i < info.map_chunks; i++)
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2178 {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2179 if (info.map[i].start < 0x400000 && info.map[i].read_16 != unused_read) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2180 if (info.map[i].flags == MMAP_READ) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2181 //Normal ROM
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2182 info.map[i].flags |= MMAP_PTR_IDX | MMAP_CODE;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2183 info.map[i].ptr_index = next_ptr_index++;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2184 if (info.map[i].ptr_index >= NUM_MEM_AREAS) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2185 fatal_error("Too many memmap chunks with MMAP_PTR_IDX after TMSS remap\n");
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2186 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2187 gen->tmss_pointers[info.map[i].ptr_index] = info.map[i].buffer;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2188 info.map[i].buffer = buffer + (info.map[i].start & ~info.map[i].mask & (tmss_size - 1));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2189 } else if (info.map[i].flags & MMAP_PTR_IDX) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2190 //Sega mapper page or multi-game mapper
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2191 gen->tmss_pointers[info.map[i].ptr_index] = info.map[i].buffer;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2192 info.map[i].buffer = buffer + (info.map[i].start & ~info.map[i].mask & (tmss_size - 1));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2193 if (info.map[i].write_16) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2194 if (!gen->tmss_write_16) {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2195 gen->tmss_write_16 = info.map[i].write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2196 gen->tmss_write_8 = info.map[i].write_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2197 info.map[i].write_16 = tmss_rom_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2198 info.map[i].write_8 = tmss_rom_write_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2199 } else if (gen->tmss_write_16 == info.map[i].write_16) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2200 info.map[i].write_16 = tmss_rom_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2201 info.map[i].write_8 = tmss_rom_write_8;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2202 } else {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2203 warning("Chunk starting at %X has a write function, but we've already stored a different one for TMSS remap\n", info.map[i].start);
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2204 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2205 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2206 } else if ((info.map[i].flags & (MMAP_READ | MMAP_WRITE)) == (MMAP_READ | MMAP_WRITE)) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2207 //RAM or SRAM
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2208 info.map[i].flags |= MMAP_PTR_IDX;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2209 info.map[i].ptr_index = next_ptr_index++;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2210 gen->tmss_pointers[info.map[i].ptr_index] = info.map[i].buffer;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2211 info.map[i].buffer = buffer + (info.map[i].start & ~info.map[i].mask & (tmss_size - 1));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2212 if (!gen->tmss_write_offset || gen->tmss_write_offset == info.map[i].start) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2213 gen->tmss_write_offset = info.map[i].start;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2214 info.map[i].flags &= ~MMAP_WRITE;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2215 if (info.map[i].flags & MMAP_ONLY_ODD) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2216 info.map[i].write_16 = tmss_odd_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2217 info.map[i].write_8 = tmss_odd_write_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2218 } else if (info.map[i].flags & MMAP_ONLY_EVEN) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2219 info.map[i].write_16 = tmss_even_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2220 info.map[i].write_8 = tmss_even_write_8;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2221 } else {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2222 info.map[i].write_16 = tmss_word_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2223 info.map[i].write_8 = tmss_word_write_8;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2224 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2225 } else {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2226 warning("Could not remap writes for chunk starting at %X for TMSS because write_offset is %X\n", info.map[i].start, gen->tmss_write_offset);
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2227 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2228 } else if (info.map[i].flags & MMAP_READ_CODE) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2229 //NOR flash
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2230 info.map[i].flags |= MMAP_PTR_IDX;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2231 info.map[i].ptr_index = next_ptr_index++;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2232 if (info.map[i].ptr_index >= NUM_MEM_AREAS) {
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2233 fatal_error("Too many memmap chunks with MMAP_PTR_IDX after TMSS remap\n");
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2234 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2235 gen->tmss_pointers[info.map[i].ptr_index] = info.map[i].buffer;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2236 info.map[i].buffer = buffer + (info.map[i].start & ~info.map[i].mask & (tmss_size - 1));
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2237 if (!gen->tmss_write_16) {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2238 gen->tmss_write_16 = info.map[i].write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2239 gen->tmss_write_8 = info.map[i].write_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2240 gen->tmss_read_16 = info.map[i].read_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2241 gen->tmss_read_8 = info.map[i].read_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2242 info.map[i].write_16 = tmss_rom_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2243 info.map[i].write_8 = tmss_rom_write_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2244 info.map[i].read_16 = tmss_rom_read_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2245 info.map[i].read_8 = tmss_rom_read_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2246 } else if (gen->tmss_write_16 == info.map[i].write_16) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2247 info.map[i].write_16 = tmss_rom_write_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2248 info.map[i].write_8 = tmss_rom_write_8;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2249 info.map[i].read_16 = tmss_rom_read_16;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2250 info.map[i].read_8 = tmss_rom_read_8;
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2251 } else {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2252 warning("Chunk starting at %X has a write function, but we've already stored a different one for TMSS remap\n", info.map[i].start);
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2253 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2254 } else {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2255 warning("Didn't remap chunk starting at %X for TMSS because it has flags %X\n", info.map[i].start, info.map[i].flags);
2034
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2256 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2257 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2258 }
8b2ef428d1aa Implement TMSS ROM and cart mapping register
Michael Pavone <pavone@retrodev.com>
parents: 2033
diff changeset
2259 gen->tmss_buffer = buffer;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2260 }
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2261 memmap_chunk* map = info.map;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2262 uint32_t map_chunks = info.map_chunks;
2088
c716af3f8980 Enable Sega CD emulation for carts if a CD image is "locked-on" even if the cart does not specify that it uses the CD peripheral in the header
Michael Pavone <pavone@retrodev.com>
parents: 2083
diff changeset
2263 if (info.wants_cd || (current_media()->chain && current_media()->chain->type == MEDIA_CDROM)) {
2277
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
2264 gen->header.type = SYSTEM_SEGACD;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2265 segacd_context *cd = alloc_configure_segacd((system_media *)current_media(), 0, force_region, &info);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2266 gen->expansion = cd;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2267 gen->version_reg &= ~NO_DISK;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2268 cd->genesis = gen;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2269 uint32_t cd_chunks;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2270 memmap_chunk *cd_map = segacd_main_cpu_map(gen->expansion, 1, &cd_chunks);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2271 map_chunks = cd_chunks + info.map_chunks;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2272 map = calloc(map_chunks, sizeof(memmap_chunk));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2273 memcpy(map, info.map, sizeof(memmap_chunk) * (info.map_chunks - 1));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2274 memcpy(map + info.map_chunks - 1, cd_map, sizeof(memmap_chunk) * cd_chunks);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2275 memcpy(map + map_chunks - 1, info.map + info.map_chunks - 1, sizeof(memmap_chunk));
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2276 free(info.map);
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2277 int max_ptr_index = -1;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2278 for (int i = 0; i < info.map_chunks - 1; i++)
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2279 {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2280 if (map[i].flags & MMAP_PTR_IDX && map[i].ptr_index > max_ptr_index) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2281 max_ptr_index = map[i].ptr_index;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2282 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2283 }
2090
00b6592cad42 Fix typo that messed up Mode 1 for carts with mappers
Michael Pavone <pavone@retrodev.com>
parents: 2088
diff changeset
2284 cd->memptr_start_index = max_ptr_index + 1;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2285 for (int i = info.map_chunks - 1; i < map_chunks - 1; i++)
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2286 {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2287 if (map[i].flags & MMAP_PTR_IDX) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2288 map[i].ptr_index += cd->memptr_start_index;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2289 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2290 }
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2291 cd->base = 0x400000;
2272
777900eb8e15 Add address logging support to sub CPU
Michael Pavone <pavone@retrodev.com>
parents: 2271
diff changeset
2292 cd->m68k->options->address_log = (ym_opts & OPT_ADDRESS_LOG) ? fopen("address_sub.log", "w") : NULL;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2293 }
2248
f7e2e11f1214 Fix improper free of memory map array from rom_info
Michael Pavone <pavone@retrodev.com>
parents: 2243
diff changeset
2294 info.map = gen->header.info.map = NULL;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2295
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2296 m68k_options *opts = malloc(sizeof(m68k_options));
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2297 init_m68k_opts(opts, map, map_chunks, MCLKS_PER_68K, sync_components);
1901
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
2298 if (!strcmp(tern_find_ptr_default(model, "tas", "broken"), "broken")) {
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
2299 opts->gen.flags |= M68K_OPT_BROKEN_READ_MODIFY;
5433252329fb Set version reg and TAS behavior based on model config
Michael Pavone <pavone@retrodev.com>
parents: 1889
diff changeset
2300 }
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2301 gen->m68k = init_68k_context(opts, NULL);
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2302 gen->m68k->system = gen;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2303 opts->address_log = (ym_opts & OPT_ADDRESS_LOG) ? fopen("address.log", "w") : NULL;
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
2304
1165
9fc680b35dbb Fix crash regression for games with some kind of mapper functionality
Michael Pavone <pavone@retrodev.com>
parents: 1130
diff changeset
2305 //This must happen after the 68K context has been allocated
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2306 for (int i = 0; i < map_chunks; i++)
1165
9fc680b35dbb Fix crash regression for games with some kind of mapper functionality
Michael Pavone <pavone@retrodev.com>
parents: 1130
diff changeset
2307 {
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2308 if (map[i].flags & MMAP_PTR_IDX) {
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2309 gen->m68k->mem_pointers[map[i].ptr_index] = map[i].buffer;
1165
9fc680b35dbb Fix crash regression for games with some kind of mapper functionality
Michael Pavone <pavone@retrodev.com>
parents: 1130
diff changeset
2310 }
9fc680b35dbb Fix crash regression for games with some kind of mapper functionality
Michael Pavone <pavone@retrodev.com>
parents: 1130
diff changeset
2311 }
2052
3748a2a8a4b7 Support Sega mapper without 'SEGA SSF' in header or ROM DB entry and implement a subset of the extended Sega mapper implemented in the Mega Everdrive when 'SEGA SSF' is present
Michael Pavone <pavone@retrodev.com>
parents: 2039
diff changeset
2312
1452
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2313 if (gen->mapper_type == MAPPER_SEGA) {
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2314 //initialize bank registers
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2315 for (int i = 1; i < sizeof(gen->bank_regs); i++)
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2316 {
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2317 gen->bank_regs[i] = i;
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2318 }
f284ad74afe1 Make initial bank register state stored in bank_regs match what is put in to mem_pointers for the sega/SSF2 mapper. Invalidate RAM code ranges on RAM deserialization
Michael Pavone <pavone@retrodev.com>
parents: 1449
diff changeset
2319 }
1954
2fd0a8cb1c80 Properly initialize Genesis reset cycle on startup. Fixes crash in GDB remote debugger when stepping past the first two instructions
Michael Pavone <pavone@retrodev.com>
parents: 1946
diff changeset
2320 gen->reset_cycle = CYCLE_NEVER;
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2321
2277
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
2322 set_audio_config(gen);
1103
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2323 return gen;
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2324 }
22e87b739ad6 WIP split of ROM loading/argument parsing from Genesis emulation code. Compiles and doesn't crash, but nothing works. Still a few too many globals as well.
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
2325
1692
5dacaef602a7 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1503 1643
diff changeset
2326 genesis_context *alloc_config_genesis_cdboot(system_media *media, uint32_t system_opts, uint8_t force_region)
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2327 {
1692
5dacaef602a7 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1503 1643
diff changeset
2328 tern_node *rom_db = get_rom_db();
5dacaef602a7 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1503 1643
diff changeset
2329 rom_info info = configure_rom(rom_db, media->buffer, media->size, NULL, 0, base_map, base_chunks);
2267
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2330 if (media->size > 0x20B) {
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2331 //Use a byte in the security code region that's unique across all 3 regions
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2332 //since it's more reliable than the official header field for this
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2333 uint8_t *bytes = media->buffer;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2334 switch (bytes[0x20B])
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2335 {
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2336 case 0x7A:
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2337 info.regions = REGION_U;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2338 break;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2339 case 0xA1:
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2340 info.regions = REGION_J;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2341 break;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2342 case 0x64:
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2343 info.regions = REGION_E;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2344 break;
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2345 }
94cca8b8429e Use byte in security code for region identification for Sega/Mega CD discs
Michael Pavone <pavone@retrodev.com>
parents: 2255
diff changeset
2346 }
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2347
1692
5dacaef602a7 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1503 1643
diff changeset
2348 segacd_context *cd = alloc_configure_segacd(media, system_opts, force_region, &info);
5dacaef602a7 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1503 1643
diff changeset
2349 genesis_context *gen = shared_init(system_opts, &info, force_region);
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2350 gen->cart = gen->lock_on = NULL;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2351 gen->save_storage = NULL;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2352 gen->save_type = SAVE_NONE;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2353 gen->version_reg &= ~NO_DISK;
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2354
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2355 gen->expansion = cd;
2272
777900eb8e15 Add address logging support to sub CPU
Michael Pavone <pavone@retrodev.com>
parents: 2271
diff changeset
2356 cd->m68k->options->address_log = (system_opts & OPT_ADDRESS_LOG) ? fopen("address_sub.log", "w") : NULL;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2357 gen->version_reg &= ~NO_DISK;
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2358 cd->genesis = gen;
1692
5dacaef602a7 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1503 1643
diff changeset
2359 setup_io_devices(config, &info, &gen->io);
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2360
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2361 uint32_t cd_chunks;
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2362 memmap_chunk *cd_map = segacd_main_cpu_map(gen->expansion, 0, &cd_chunks);
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2363 memmap_chunk *map = malloc(sizeof(memmap_chunk) * (cd_chunks + base_chunks));
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2364 memcpy(map, cd_map, sizeof(memmap_chunk) * cd_chunks);
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2365 memcpy(map + cd_chunks, base_map, sizeof(memmap_chunk) * base_chunks);
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2366 map[cd_chunks].buffer = gen->work_ram;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2367 uint32_t num_chunks = cd_chunks + base_chunks;
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2368
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2369 m68k_options *opts = malloc(sizeof(m68k_options));
2054
8ee7ecbf3f21 Implement enough of Sega CD gate array and Sub CPU to pass Sik's Mode 1 test ROM
Michael Pavone <pavone@retrodev.com>
parents: 2053
diff changeset
2370 init_m68k_opts(opts, map, num_chunks, MCLKS_PER_68K, sync_components);
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2371 //TODO: make this configurable
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2372 opts->gen.flags |= M68K_OPT_BROKEN_READ_MODIFY;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2373 gen->m68k = init_68k_context(opts, NULL);
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2374 gen->m68k->system = gen;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2375 opts->address_log = (system_opts & OPT_ADDRESS_LOG) ? fopen("address.log", "w") : NULL;
2053
3414a4423de1 Merge from default
Michael Pavone <pavone@retrodev.com>
parents: 1692 2052
diff changeset
2376
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2377 //This must happen after the 68K context has been allocated
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2378 for (int i = 0; i < num_chunks; i++)
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2379 {
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2380 if (map[i].flags & MMAP_PTR_IDX) {
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2381 gen->m68k->mem_pointers[map[i].ptr_index] = map[i].buffer;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2382 }
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2383 }
2083
372625dd9590 Persist BRAM to file. Load BIOS relative to blastem directory
Michael Pavone <pavone@retrodev.com>
parents: 2080
diff changeset
2384 gen->header.type = SYSTEM_SEGACD;
2277
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
2385
9e578fd493e1 Implement gain control for Ricoh PCM and CDDA with defaults based on Model 2 Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2272
diff changeset
2386 set_audio_config(gen);
1503
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2387 return gen;
a763523dadf4 Added code for initializing a combined Genesis + Sega CD system when a Sega CD ISO is loaded
Michael Pavone <pavone@retrodev.com>
parents: 1452
diff changeset
2388 }