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annotate jaguar.c @ 1386:d0008f2620cc

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Force J region for Japanese version of Light Crusader
author Michael Pavone <pavone@retrodev.com>
date Wed, 31 May 2017 21:34:59 -0700
parents b45d1f64060e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include <stdint.h>
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2 #include <stdio.h>
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3 #include <stddef.h>
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4 #include <stdlib.h>
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5 #include "m68k_core.h"
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6 #include "68kinst.h"
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7 #include "jaguar.h"
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8 #include "util.h"
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9 #include "debug.h"
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10 #include "config.h"
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11 #include "render.h"
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12
382614130914 Some initial work on Atari Jaguar emulation
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13 //BIOS Area Memory map
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14 // 10 00 00 - 10 04 00 : Video mode/ Memory control registers
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15 // 10 04 00 - 10 08 00 : CLUT
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16 // 10 08 00 - 10 10 00 : Line buffer A
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17 // 10 10 00 - 10 18 00 : Line buffer B
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18 // 10 18 00 - 10 20 00 : Write Line buffer
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19 // 10 21 00 - 10 30 00 : GPU/blitter registers
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20 // 10 30 00 - 10 40 00 : GPU Local RAM (mirrored every 1K?)
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21 // 11 00 00 - 11 00 40 : Timer/Clock registers
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22 // 11 40 00 - 11 40 04 : Joystick Interface
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23 // 11 A1 00 - 11 A1 52 : DSP/DAC/I2S Registers
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24 // 11 B0 00 - 11 D0 00 : DSP Local RAM (8KB)
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25 // 11 D0 00 - 11 E0 00 : Wave table ROM
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26
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27 int headless = 1;
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28 tern_node * config;
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29
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30 void handle_keydown(int keycode, uint8_t scancode)
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31 {
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32 }
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33
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34 void handle_keyup(int keycode, uint8_t scancode)
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35 {
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36 }
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37
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38 void handle_joydown(int joystick, int button)
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39 {
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40 }
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41
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42 void handle_joyup(int joystick, int button)
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43 {
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44 }
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45
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46 void handle_joy_dpad(int joystick, int dpadnum, uint8_t value)
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47 {
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48 }
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49
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50 void handle_mousedown(int mouse, int button)
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51 {
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52 }
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53
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54 void handle_mouseup(int mouse, int button)
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55 {
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56 }
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57
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58 void handle_mouse_moved(int mouse, uint16_t x, uint16_t y, int16_t deltax, int16_t deltay)
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59 {
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60 }
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61
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62 void jag_update_m68k_int(jaguar_context *system)
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63 {
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64 m68k_context *m68k = system->m68k;
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65 if (m68k->sync_cycle - m68k->current_cycle > system->max_cycles) {
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66 m68k->sync_cycle = m68k->current_cycle + system->max_cycles;
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67 }
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68 //TODO: Support other interrupt sources
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69 if (!system->cpu_int_control || (m68k->status & 0x7)) {
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70 m68k->int_cycle = CYCLE_NEVER;
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71 } else if(system->cpu_int_control & system->video->cpu_int_pending) {
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72 m68k->int_cycle = m68k->current_cycle;
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73 //supposedly all interrupts on the jaguar are "level 0" autovector interrupts
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74 //which I assume means they're abusing the "spurious interrupt" vector
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75 m68k->int_num = VECTOR_USER0 - VECTOR_SPURIOUS_INTERRUPT;
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76 } else {
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77 m68k->int_cycle = jag_next_vid_interrupt(system->video);
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78 m68k->int_num = VECTOR_USER0 - VECTOR_SPURIOUS_INTERRUPT;
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79 }
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80
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81 if (m68k->int_cycle > m68k->current_cycle && m68k->int_pending == INT_PENDING_SR_CHANGE) {
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82 m68k->int_pending = INT_PENDING_NONE;
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83 }
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84
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85 m68k->target_cycle = m68k->int_cycle < m68k->sync_cycle ? m68k->int_cycle : m68k->sync_cycle;
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86 if (m68k->should_return) {
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87 m68k->target_cycle = m68k->current_cycle;
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88 } else if (m68k->target_cycle < m68k->current_cycle) {
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89 //Changes to SR can result in an interrupt cycle that's in the past
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90 //This can cause issues with the implementation of STOP though
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91 m68k->target_cycle = m68k->current_cycle;
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92 }
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93 }
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94
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95 void rom0_write_16(uint32_t address, jaguar_context *system, uint16_t value)
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96 {
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97 //TODO: Use write_latch and write_pending to turn two 16-bit writes into a 32-bit one
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98 //Documentation heavily suggests that writes to most registers should be 32-bits wide
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99 if (address < 0x100000 || address >= 0x120000) {
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100 //Boot ROM
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101 fprintf(stderr, "Invalid write to Boot ROM - %X:%X\n", address, value);
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102 return;
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103 }
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104 if (address < 0x103000) {
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105 if (address < 0x101000) {
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106 if (address < 0x100400) {
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107 //Video mode / Memory control registers
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108 switch(address & 0x3FE)
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109 {
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110 case 0:
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111 if (((value ^ system->memcon1) & 1) || !system->memcon_written) {
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112 uint16_t **mem_pointers = system->m68k->mem_pointers;
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113 int rom = value & 1 ? 4 : 1;
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114 int ram0 = value & 1 ? 0 : 6;
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115 int ram1 = value & 1 ? 2 : 4;
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116 mem_pointers[ram0] = mem_pointers[ram0 + 1] = system->dram;
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117 //these are probably open bus, but mirror DRAM for now
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118 mem_pointers[ram1] = mem_pointers[ram1 + 1] = system->dram;
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119
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120 mem_pointers[rom] = system->cart;
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121 mem_pointers[rom + 1] = system->cart + ((0x200000 & (system->cart_size-1)) >> 1);
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122 mem_pointers[rom + 2] = system->cart + ((0x400000 & (system->cart_size-1)) >> 1);
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123 system->memcon_written = 1;
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124 printf("MEMCON1 write - ROMHI: %d\n", value & 1);
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125 switch (system->memcon1 >> 3 & 3)
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126 {
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127 case 0:
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128 system->rom_cycles = 10;
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129 break;
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130 case 1:
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131 system->rom_cycles = 8;
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132 break;
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133 case 2:
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parents: 1089
diff changeset
134 system->rom_cycles = 6;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
135 break;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
136 case 3:
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
137 system->rom_cycles = 5;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
138 break;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
139 }
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
140 //TODO: invalidate code cache
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
141 }
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
142 system->memcon1 = value;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
143 break;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
144 case 2:
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
145 system->memcon2 = value;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
146 break;
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
147 case 0xE0:
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
148 system->cpu_int_control = value & 0x1F;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
149 system->video->cpu_int_pending &= ~(value >> 8);
1100
653558f6fa7a Fix Jaguar video interrupt cycle calculation
Michael Pavone <pavone@retrodev.com>
parents: 1097
diff changeset
150 printf("INT1 write: %X @ %d - int_pending: %X, int_control: %X\n", value, system->m68k->current_cycle, system->video->cpu_int_pending, system->cpu_int_control);
653558f6fa7a Fix Jaguar video interrupt cycle calculation
Michael Pavone <pavone@retrodev.com>
parents: 1097
diff changeset
151 jag_update_m68k_int(system);
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
152 //TODO: apply mask to int pending fields on other components once they are implemented
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
153 break;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
154 case 0xE2:
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
155 //no real handling of bus conflicts presently, so this doesn't really need to do anything yet
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
156 printf("INT2 write: %X\n", value);
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
157 break;
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
158 default:
1088
c0a026e974f4 Basic handling of video/object processor register writes
Michael Pavone <pavone@retrodev.com>
parents: 1087
diff changeset
159 jag_video_reg_write(system->video, address, value);
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
160 jag_update_m68k_int(system);
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
161 break;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
162 }
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
163 } else if (address < 0x100800) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
164 //CLUT
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
165 address = address >> 1 & 255;
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
166 system->video->clut[address] = value;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
167 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
168 //Line buffer A
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
169 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
170 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
171 system->video->line_buffer_a[address] = value;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
172 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
173 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
174 } else if (address < 0x101800) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
175 //Line buffer B
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
176 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
177 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
178 system->video->line_buffer_b[address] = value;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
179 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
180 } else if (address < 0x102100) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
181 //Write Line Buffer
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
182 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
183 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
184 system->video->write_line_buffer[address] = value;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
185 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
186 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
187 //GPU/Blitter registers
1092
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
188 if (address < 0x102200) {
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
189 fprintf(stderr, "Unhandled write to GPU registers %X: %X\n", address, value);
1094
1dba006bad47 Get Jaguar disassembler more or less working. Dump gpu program to file when GPU GO bit is set
Michael Pavone <pavone@retrodev.com>
parents: 1092
diff changeset
190 if (address == 0x102116 && (value & 1)) {
1dba006bad47 Get Jaguar disassembler more or less working. Dump gpu program to file when GPU GO bit is set
Michael Pavone <pavone@retrodev.com>
parents: 1092
diff changeset
191 FILE *f = fopen("gpu.bin", "wb");
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
192 uint8_t buf[4];
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
193 for (int i = 0; i < GPU_RAM_BYTES/sizeof(uint32_t); i++)
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
194 {
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
195 buf[0] = system->gpu_local[i] >> 24;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
196 buf[1] = system->gpu_local[i] >> 16;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
197 buf[2] = system->gpu_local[i] >> 8;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
198 buf[3] = system->gpu_local[i];
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
199 fwrite(buf, 1, sizeof(buf), f);
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
200 }
1094
1dba006bad47 Get Jaguar disassembler more or less working. Dump gpu program to file when GPU GO bit is set
Michael Pavone <pavone@retrodev.com>
parents: 1092
diff changeset
201 fclose(f);
1dba006bad47 Get Jaguar disassembler more or less working. Dump gpu program to file when GPU GO bit is set
Michael Pavone <pavone@retrodev.com>
parents: 1092
diff changeset
202 }
1092
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
203 } else {
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
204 fprintf(stderr, "Unhandled write to Blitter registers %X: %X\n", address, value);
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
205 }
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
206 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
207 } else if (address < 0x11A100) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
208 if (address < 0x110000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
209 //GPU Local RAM
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
210 uint32_t offset = address >> 2 & (GPU_RAM_BYTES / sizeof(uint32_t) - 1);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
211 uint32_t value32 = value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
212 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
213 system->gpu_local[offset] &= 0xFFFF0000;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
214 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
215 system->gpu_local[offset] &= 0x0000FFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
216 value32 = value32 << 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
217 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
218 system->gpu_local[offset] |= value32;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
219 } else if (address < 0x114000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
220 //timer clock registers
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
221 fprintf(stderr, "Unhandled write to timer/clock registers - %X:%X\n", address, value);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
222 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
223 //joystick interface
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
224 fprintf(stderr, "Unhandled write to joystick interface - %X:%X\n", address, value);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
225 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
226 } else if (address < 0x11B000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
227 //DSP/DAC/I2S Registers
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
228 fprintf(stderr, "Unhandled write to DSP/DAC/I2S registers - %X:%X\n", address, value);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
229 } else if (address < 0x11D000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
230 //DSP local RAM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
231 uint32_t offset = address >> 2 & (DSP_RAM_BYTES / sizeof(uint32_t) - 1);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
232 uint32_t value32 = value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
233 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
234 system->dsp_local[offset] &= 0xFFFF0000;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
235 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
236 system->dsp_local[offset] &= 0x0000FFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
237 value32 = value32 << 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
238 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
239 system->gpu_local[offset] |= value32;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
240 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
241 //Wave table ROM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
242 fprintf(stderr, "Invalid write to wave table ROM - %X:%X\n", address, value);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
243 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
244 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
245
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
246 uint16_t rom0_read_16(uint32_t address, jaguar_context *system)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
247 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
248 if (address < 0x100000 || address >= 0x120000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
249 //Boot ROM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
250 address = address >> 1 & ((system->bios_size >> 1) - 1);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
251 return system->bios[address];
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
252 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
253 if (address < 0x103000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
254 if (address < 0x101000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
255 if (address < 0x100400) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
256 //Video mode / Memory control registers
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
257 switch (address & 0x3FE)
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
258 {
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
259 case 0xE0:
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
260 puts("INT1 read");
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
261 //TODO: Bitwise or with cpu_int_pending fields from other components once implemented
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
262 return system->video->cpu_int_pending;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
263 break;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
264 default:
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
265 fprintf(stderr, "Unhandled read from video mode/memory control registers - %X\n", address);
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
266 }
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
267 } else if (address < 0x100800) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
268 //CLUT
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
269 address = address >> 1 & 255;
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
270 return system->video->clut[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
271 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
272 //Line buffer A
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
273 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
274 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
275 return system->video->line_buffer_a[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
276 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
277 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
278 } else if (address < 0x101800) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
279 //Line buffer B
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
280 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
281 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
282 return system->video->line_buffer_b[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
283 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
284 } else if (address < 0x102100) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
285 //Write Line Buffer
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
286 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
287 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
288 return system->video->write_line_buffer[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
289 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
290 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
291 //GPU/Blitter registers
1092
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
292 if (address < 0x102200) {
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
293 fprintf(stderr, "Unhandled read from GPU registers %X\n", address);
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
294 } else {
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
295 fprintf(stderr, "Unhandled read from Blitter registers %X\n", address);
f338c950fcef Slightly more detailed logging of unhandled register writes
Michael Pavone <pavone@retrodev.com>
parents: 1090
diff changeset
296 }
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
297 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
298 } else if (address < 0x11A100) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
299 if (address < 0x110000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
300 //GPU Local RAM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
301 uint32_t offset = address >> 2 & (GPU_RAM_BYTES / sizeof(uint32_t) - 1);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
302 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
303 return system->gpu_local[offset];
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
304 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
305 return system->gpu_local[offset] >> 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
306 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
307 } else if (address < 0x114000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
308 //timer clock registers
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
309 fprintf(stderr, "Unhandled read from timer/clock registers - %X\n", address);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
310 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
311 //joystick interface
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
312 fprintf(stderr, "Unhandled read from joystick interface - %X\n", address);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
313 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
314 } else if (address < 0x11B000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
315 //DSP/DAC/I2S Registers
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
316 fprintf(stderr, "Unhandled read from DSP/DAC/I2S registers - %X\n", address);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
317 } else if (address < 0x11D000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
318 //DSP local RAM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
319 uint32_t offset = address >> 2 & (DSP_RAM_BYTES / sizeof(uint32_t) - 1);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
320 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
321 return system->dsp_local[offset];
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
322 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
323 return system->dsp_local[offset] >> 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
324 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
325 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
326 //Wave table ROM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
327 fprintf(stderr, "Unhandled read from wave table ROM - %X\n", address);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
328 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
329 return 0xFFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
330 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
331
1090
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
332 uint64_t rom0_read_64(uint32_t address, jaguar_context *system)
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
333 {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
334 address &= 0x1FFFFF;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
335 uint64_t high = rom0_read_16(address, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
336 uint64_t highmid = rom0_read_16(address+2, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
337 uint64_t lowmid = rom0_read_16(address+4, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
338 uint64_t low = rom0_read_16(address+6, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
339 return high << 48 | highmid << 32 | lowmid << 16 | low;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
340 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
341
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
342 void rom0_write_64(uint32_t address, jaguar_context *system, uint64_t val)
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
343 {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
344 address &= 0x1FFFFF;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
345 rom0_write_16(address, system, val >> 48);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
346 rom0_write_16(address+2, system, val >> 32);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
347 rom0_write_16(address+4, system, val >> 16);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
348 rom0_write_16(address+6, system, val);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
349 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
350
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
351 uint64_t jag_read_phrase(jaguar_context *system, uint32_t address, uint32_t *cycles)
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
352 {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
353 if (!system->memcon_written) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
354 //unsure of timing, but presumably at least 2 32-bit reads
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
355 //which presumably take a minimum of 1 cycle
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
356 //reality probably depends on the exact area read
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
357 //docs seem to imply some areas only 16-bits wide whereas others are 32-bit
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
358 *cycles += 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
359 return rom0_read_64(address, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
360 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
361 uint16_t *src;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
362 if (system->memcon1 & 1) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
363 if (address < 0x800000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
364 src = system->dram + (address >> 1 & (DRAM_WORDS - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
365 //DRAM is 64-bits wide, but sounds like an access is still at least two cycles
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
366 *cycles += 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
367 } else if (address < 0xE00000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
368 //cart is slow and only 32-bits wide
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
369 *cycles += 2 * (system->rom_cycles);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
370 src = system->cart + (address >> 1 & (system->cart_size - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
371 } else {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
372 *cycles += 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
373 return rom0_read_64(address, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
374 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
375 } else if (address > 0x800000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
376 src = system->dram + (address >> 1 & (DRAM_WORDS - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
377 //DRAM is 64-bits wide, but sounds like an access is still at least two cycles
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
378 *cycles += 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
379 } else if (address > 0x200000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
380 //cart is slow and only 32-bits wide
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
381 *cycles += 2 * (system->rom_cycles);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
382 src = system->cart + (address >> 1 & (system->cart_size - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
383 } else {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
384 *cycles += 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
385 return rom0_read_64(address, system);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
386 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
387 uint64_t high = src[0];
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
388 uint64_t highmid = src[1];
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
389 uint64_t lowmid = src[2];
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
390 uint64_t low = src[3];
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
391 return high << 48 | highmid << 32 | lowmid << 16 | low;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
392 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
393
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
394 uint32_t jag_write_phrase(jaguar_context *system, uint32_t address, uint64_t val)
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
395 {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
396 if (!system->memcon_written) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
397 //unsure of timing, but presumably at least 2 32-bit reads
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
398 //which presumably take a minimum of 1 cycle
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
399 //reality probably depends on the exact area read
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
400 //docs seem to imply some areas only 16-bits wide whereas others are 32-bit
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
401 rom0_write_64(address, system, val);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
402 return 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
403 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
404 uint16_t *dst;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
405 uint32_t cycles;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
406 if (system->memcon1 & 1) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
407 if (address < 0x800000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
408 dst = system->dram + (address >> 1 & (DRAM_WORDS - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
409 //DRAM is 64-bits wide, but sounds like an access is still at least two cycles
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
410 cycles = 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
411 } else if (address < 0xE00000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
412 dst = system->cart + (address >> 1 & (system->cart_size - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
413 //cart is slow and only 32-bits wide
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
414 cycles = 2 * (system->rom_cycles);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
415 } else {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
416 rom0_write_64(address, system, val);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
417 return 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
418 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
419 } else if (address > 0x800000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
420 dst = system->dram + (address >> 1 & (DRAM_WORDS - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
421 //DRAM is 64-bits wide, but sounds like an access is still at least two cycles
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
422 cycles = 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
423 } else if (address > 0x200000) {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
424 dst = system->cart + (address >> 1 & (system->cart_size - 1));
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
425 //cart is slow and only 32-bits wide
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
426 cycles = 2 * (system->rom_cycles);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
427 } else {
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
428 rom0_write_64(address, system, val);
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
429 return 2;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
430 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
431 dst[0] = val >> 48;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
432 dst[1] = val >> 32;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
433 dst[2] = val >> 16;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
434 dst[3] = val;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
435 return cycles;
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
436 }
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
437
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
438 m68k_context * sync_components(m68k_context * context, uint32_t address)
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
439 {
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
440 jaguar_context *system = context->system;
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
441 jag_video_run(system->video, context->current_cycle);
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
442 jag_update_m68k_int(system);
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
443 if (context->current_cycle > 0x10000000) {
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
444 context->current_cycle -= 0x10000000;
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
445 system->video->cycles -= 0x10000000;
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
446 }
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
447 if (context->int_ack) {
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
448 context->int_ack = 0;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
449 //hack until 68K core more properly supports non-autovector interrupts
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
450 context->status |= 1;
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
451 }
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
452 jag_update_m68k_int(system);
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
453 return context;
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
454 }
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
455
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
456
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
457 void *rom0_write_m68k(uint32_t address, void *context, uint16_t value)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
458 {
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
459 sync_components(context, 0);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
460 rom0_write_16(address, ((m68k_context *)context)->system, value);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
461 return context;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
462 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
463
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
464 uint16_t rom0_read_m68k(uint32_t address, void *context)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
465 {
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
466 sync_components(context, 0);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
467 return rom0_read_16(address, ((m68k_context *)context)->system);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
468 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
469
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
470 void *rom0_write_m68k_b(uint32_t address, void *context, uint8_t value)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
471 {
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
472 sync_components(context, 0);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
473 //seems unlikely these areas support byte access
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
474 uint16_t value16 = value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
475 value16 |= value16 << 8;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
476 rom0_write_16(address, ((m68k_context *)context)->system, value16);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
477 return context;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
478 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
479
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
480 uint8_t rom0_read_m68k_b(uint32_t address, void *context)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
481 {
1089
87597a048d38 Initial implementation of video output hardware
Michael Pavone <pavone@retrodev.com>
parents: 1088
diff changeset
482 sync_components(context, 0);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
483 uint16_t value = rom0_read_16(address, ((m68k_context *)context)->system);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
484 if (address & 1) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
485 return value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
486 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
487 return value >> 8;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
488 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
489
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
490 m68k_context *handle_m68k_reset(m68k_context *context)
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
491 {
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
492 puts("M68K executed RESET");
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
493 return context;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
494 }
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
495
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
496 jaguar_context *init_jaguar(uint16_t *bios, uint32_t bios_size, uint16_t *cart, uint32_t cart_size)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
497 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
498 jaguar_context *system = calloc(1, sizeof(jaguar_context));
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
499 system->bios = bios;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
500 system->bios_size = bios_size;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
501 system->cart = cart;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
502 system->cart_size = cart_size;
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
503 //TODO: Figure out a better default for this and make it configurable
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
504 system->max_cycles = 3000;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
505
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
506 memmap_chunk *jag_m68k_map = calloc(8, sizeof(memmap_chunk));
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
507 for (uint32_t start = 0, index=0; index < 8; index++, start += 0x200000)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
508 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
509 jag_m68k_map[index].start = start;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
510 jag_m68k_map[index].end = start + 0x200000;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
511 jag_m68k_map[index].mask = index ? 0x1FFFFF : 0xFFFFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
512 jag_m68k_map[index].aux_mask = bios_size - 1;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
513 jag_m68k_map[index].ptr_index = index;
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
514 jag_m68k_map[index].flags = MMAP_READ | MMAP_WRITE | MMAP_PTR_IDX | MMAP_FUNC_NULL | MMAP_AUX_BUFF | MMAP_CODE;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
515 jag_m68k_map[index].buffer = bios;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
516 jag_m68k_map[index].read_16 = rom0_read_m68k;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
517 jag_m68k_map[index].read_8 = rom0_read_m68k_b;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
518 jag_m68k_map[index].write_16 = rom0_write_m68k;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
519 jag_m68k_map[index].write_8 = rom0_write_m68k_b;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
520 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
521 m68k_options *opts = malloc(sizeof(m68k_options));
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
522 init_m68k_opts(opts, jag_m68k_map, 8, 2);
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
523 system->m68k = init_68k_context(opts, handle_m68k_reset);
1097
faa3a4617f62 Get Jaguar video interrupt working
Michael Pavone <pavone@retrodev.com>
parents: 1094
diff changeset
524 system->m68k->sync_cycle = system->max_cycles;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
525 system->m68k->system = system;
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
526 system->video = jag_video_init();
1090
a68274a25e2f Initial stab at implementing the Jaguar object processor
Michael Pavone <pavone@retrodev.com>
parents: 1089
diff changeset
527 system->video->system = system;
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
528 return system;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
529 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
530
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
531 //modified copy of the version in blastem.c
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
532 uint16_t *load_rom(char * filename, uint32_t *size)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
533 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
534 FILE * f = fopen(filename, "rb");
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
535 if (!f) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
536 return 0;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
537 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
538 fseek(f, 0, SEEK_END);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
539 long filesize = ftell(f);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
540 fseek(f, 0, SEEK_SET);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
541
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
542 *size = nearest_pow2(filesize);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
543 uint16_t *cart = malloc(*size);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
544 if (filesize != fread(cart, 1, filesize, f)) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
545 fatal_error("Error reading from %s\n", filename);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
546 }
1083
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
547 filesize = (filesize + 1) & ~1L;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
548 for (long i = 0; i < filesize; i+=2)
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
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parents: 1080
diff changeset
549 {
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
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diff changeset
550 long index = i >> 1;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
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parents: 1080
diff changeset
551 cart[index] = cart[index] >> 8 | cart[index] << 8;
f6e998227300 Byteswap ROMs in jaguar ROM loader. Handle switching memory map from writes to memcon1. Fix some typos in error messages
Michael Pavone <pavone@retrodev.com>
parents: 1080
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552 }
1080
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parents:
diff changeset
553 while (filesize < *size)
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parents:
diff changeset
554 {
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diff changeset
555 cart[filesize / 2] = 0xFFFF;
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parents:
diff changeset
556 filesize += 2;
382614130914 Some initial work on Atari Jaguar emulation
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557 }
382614130914 Some initial work on Atari Jaguar emulation
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558 fclose(f);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
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559 return cart;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
560 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
561
382614130914 Some initial work on Atari Jaguar emulation
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parents:
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562 //temporary main function until I clean up blastem.c
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
563 int main(int argc, char **argv)
382614130914 Some initial work on Atari Jaguar emulation
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parents:
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564 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
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565 if (argc < 3) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
566 fputs("Usage: blastjag BIOS ROM\n", stderr);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
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567 return 1;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
568 }
1085
bc86eaf6699d Fix some unresolved symbols when linking blastjag
Michael Pavone <pavone@retrodev.com>
parents: 1083
diff changeset
569 set_exe_str(argv[0]);
bc86eaf6699d Fix some unresolved symbols when linking blastjag
Michael Pavone <pavone@retrodev.com>
parents: 1083
diff changeset
570 config = load_config(argv[0]);
1080
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
571 uint32_t bios_size;
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parents:
diff changeset
572 uint16_t *bios = load_rom(argv[1], &bios_size);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
573 if (!bios_size) {
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
574 fatal_error("Failed to read BIOS from %s\n", argv[1]);
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Michael Pavone <pavone@retrodev.com>
parents:
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575 }
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Michael Pavone <pavone@retrodev.com>
parents:
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576 uint32_t cart_size;
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parents:
diff changeset
577 uint16_t *cart = load_rom(argv[2], &cart_size);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
578 if (!bios_size) {
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parents:
diff changeset
579 fatal_error("Failed to read cart from %s\n", argv[2]);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
580 }
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
581 jaguar_context *system = init_jaguar(bios, bios_size, cart, cart_size);
1114
b45d1f64060e Fix blastjag target
Michael Pavone <pavone@retrodev.com>
parents: 1100
diff changeset
582 render_init(640, 480, "BlastJag", 0);
1080
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
583 m68k_reset(system->m68k);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
584 return 0;
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parents:
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585 }