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annotate jaguar.c @ 1087:6433d4d05934

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Added placeholder code for video output hardware/object processor
author Michael Pavone <pavone@retrodev.com>
date Fri, 07 Oct 2016 18:27:38 -0700
parents bc86eaf6699d
children c0a026e974f4
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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 "jaguar.h"
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7 #include "util.h"
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8 #include "debug.h"
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9 #include "config.h"
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11 //BIOS Area Memory map
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12 // 10 00 00 - 10 04 00 : Video mode/ Memory control registers
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13 // 10 04 00 - 10 08 00 : CLUT
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14 // 10 08 00 - 10 10 00 : Line buffer A
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15 // 10 10 00 - 10 18 00 : Line buffer B
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16 // 10 18 00 - 10 20 00 : Write Line buffer
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17 // 10 21 00 - 10 30 00 : GPU/blitter registers
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18 // 10 30 00 - 10 40 00 : GPU Local RAM (mirrored every 1K?)
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19 // 11 00 00 - 11 00 40 : Timer/Clock registers
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20 // 11 40 00 - 11 40 04 : Joystick Interface
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21 // 11 A1 00 - 11 A1 52 : DSP/DAC/I2S Registers
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22 // 11 B0 00 - 11 D0 00 : DSP Local RAM (8KB)
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23 // 11 D0 00 - 11 E0 00 : Wave table ROM
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24
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25 int headless = 1;
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26 tern_node * config;
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27
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28 void handle_keydown(int keycode, uint8_t scancode)
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29 {
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30 }
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31
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32 void handle_keyup(int keycode, uint8_t scancode)
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33 {
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34 }
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35
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36 void handle_joydown(int joystick, int button)
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37 {
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38 }
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39
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40 void handle_joyup(int joystick, int button)
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41 {
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42 }
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43
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44 void handle_joy_dpad(int joystick, int dpadnum, uint8_t value)
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45 {
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46 }
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47
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48 void handle_mousedown(int mouse, int button)
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49 {
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50 }
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51
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52 void handle_mouseup(int mouse, int button)
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53 {
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54 }
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55
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56 void handle_mouse_moved(int mouse, uint16_t x, uint16_t y, int16_t deltax, int16_t deltay)
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57 {
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58 }
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60
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61 void rom0_write_16(uint32_t address, jaguar_context *system, uint16_t value)
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62 {
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63 //TODO: Use write_latch and write_pending to turn two 16-bit writes into a 32-bit one
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64 //Documentation heavily suggests that writes to most registers should be 32-bits wide
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65 if (address < 0x100000 || address >= 0x120000) {
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66 //Boot ROM
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67 fprintf(stderr, "Invalid write to Boot ROM - %X:%X\n", address, value);
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68 return;
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69 }
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70 if (address < 0x103000) {
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71 if (address < 0x101000) {
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72 if (address < 0x100400) {
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73 //Video mode / Memory control registers
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74 switch(address & 0x3FE)
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75 {
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76 case 0:
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77 if (((value ^ system->memcon1) & 1) || !system->memcon_written) {
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78 uint16_t **mem_pointers = system->m68k->mem_pointers;
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79 int rom = value & 1 ? 4 : 1;
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80 int ram0 = value & 1 ? 0 : 6;
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81 int ram1 = value & 1 ? 2 : 4;
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82 mem_pointers[ram0] = mem_pointers[ram0 + 1] = system->dram;
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83 //these are probably open bus, but mirror DRAM for now
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84 mem_pointers[ram1] = mem_pointers[ram1 + 1] = system->dram;
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85
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86 mem_pointers[rom] = system->cart;
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87 mem_pointers[rom + 1] = system->cart + ((0x200000 & (system->cart_size-1)) >> 1);
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88 mem_pointers[rom + 2] = system->cart + ((0x400000 & (system->cart_size-1)) >> 1);
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89 system->memcon_written = 1;
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90 printf("MEMCON1 write - ROMHI: %d", value & 1);
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91 //TODO: invalidate code cache
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92 }
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93 system->memcon1 = value;
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94 break;
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95 case 2:
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96 system->memcon2 = value;
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97 break;
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98 default:
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99 fprintf(stderr, "Unhandled write to video mode/memory control registers - %X:%X\n", address, value);
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100 break;
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101 }
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102 } else if (address < 0x100800) {
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103 //CLUT
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104 address = address >> 1 & 255;
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105 system->video->clut[address] = value;
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106 } else {
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107 //Line buffer A
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108 address = address >> 1 & 0x3FF;
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109 if (address < LINEBUFFER_WORDS) {
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110 system->video->line_buffer_a[address] = value;
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111 }
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112 }
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113 } else if (address < 0x101800) {
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114 //Line buffer B
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115 address = address >> 1 & 0x3FF;
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116 if (address < LINEBUFFER_WORDS) {
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117 system->video->line_buffer_b[address] = value;
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118 }
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119 } else if (address < 0x102100) {
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120 //Write Line Buffer
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121 address = address >> 1 & 0x3FF;
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122 if (address < LINEBUFFER_WORDS) {
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123 system->video->write_line_buffer[address] = value;
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124 }
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125 } else {
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126 //GPU/Blitter registers
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127 fprintf(stderr, "Unhandled write to GPU/Blitter registers %X: %X\n", address, value);
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128 }
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129 } else if (address < 0x11A100) {
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130 if (address < 0x110000) {
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131 //GPU Local RAM
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132 uint32_t offset = address >> 2 & (GPU_RAM_BYTES / sizeof(uint32_t) - 1);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
133 uint32_t value32 = value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
134 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
135 system->gpu_local[offset] &= 0xFFFF0000;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
136 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
137 system->gpu_local[offset] &= 0x0000FFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
138 value32 = value32 << 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
139 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
140 system->gpu_local[offset] |= value32;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
141 } else if (address < 0x114000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
142 //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
143 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
144 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
145 //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
146 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
147 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
148 } else if (address < 0x11B000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
149 //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
150 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
151 } else if (address < 0x11D000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
152 //DSP local RAM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
153 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
154 uint32_t value32 = value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
155 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
156 system->dsp_local[offset] &= 0xFFFF0000;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
157 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
158 system->dsp_local[offset] &= 0x0000FFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
159 value32 = value32 << 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
160 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
161 system->gpu_local[offset] |= value32;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
162 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
163 //Wave table ROM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
164 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
165 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
166 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
167
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
168 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
169 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
170 if (address < 0x100000 || address >= 0x120000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
171 //Boot ROM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
172 address = address >> 1 & ((system->bios_size >> 1) - 1);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
173 return system->bios[address];
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
174 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
175 if (address < 0x103000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
176 if (address < 0x101000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
177 if (address < 0x100400) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
178 //Video mode / Memory control 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
179 fprintf(stderr, "Unhandled read from video mode/memory control registers - %X\n", address);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
180 } else if (address < 0x100800) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
181 //CLUT
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
182 address = address >> 1 & 255;
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
183 return system->video->clut[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
184 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
185 //Line buffer A
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
186 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
187 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
188 return system->video->line_buffer_a[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
189 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
190 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
191 } else if (address < 0x101800) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
192 //Line buffer B
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
193 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
194 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
195 return system->video->line_buffer_b[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
196 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
197 } else if (address < 0x102100) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
198 //Write Line Buffer
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
199 address = address >> 1 & 0x3FF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
200 if (address < LINEBUFFER_WORDS) {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
201 return system->video->write_line_buffer[address];
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
202 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
203 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
204 //GPU/Blitter registers
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
205 fprintf(stderr, "Unhandled read from GPU/Blitter registers %X\n", address);
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
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
210 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
211 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
212 return system->gpu_local[offset];
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
213 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
214 return system->gpu_local[offset] >> 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
215 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
216 } else if (address < 0x114000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
217 //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
218 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
219 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
220 //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
221 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
222 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
223 } else if (address < 0x11B000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
224 //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
225 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
226 } else if (address < 0x11D000) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
227 //DSP local RAM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
228 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
229 if (address & 2) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
230 return system->dsp_local[offset];
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
231 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
232 return system->dsp_local[offset] >> 16;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
233 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
234 } else {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
235 //Wave table ROM
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
236 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
237 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
238 return 0xFFFF;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
239 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
240
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
241
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
242 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
243 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
244 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
245 return context;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
246 }
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 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
249 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
250 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
251 }
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 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
254 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
255 //seems unlikely these areas support byte access
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
256 uint16_t value16 = value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
257 value16 |= value16 << 8;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
258 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
259 return context;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
260 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
261
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
262 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
263 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
264 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
265 if (address & 1) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
266 return value;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
267 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
268 return value >> 8;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
269 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
270
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
271 m68k_context * sync_components(m68k_context * context, uint32_t address)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
272 {
1087
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
273 jaguar_context *system = context->system;
6433d4d05934 Added placeholder code for video output hardware/object processor
Michael Pavone <pavone@retrodev.com>
parents: 1085
diff changeset
274 jag_video_run(system->video, context->current_cycle);
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
275 if (context->current_cycle > 0x10000000) {
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276 context->current_cycle -= 0x10000000;
1087
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277 system->video->cycles -= 0x10000000;
1080
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278 }
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279 return context;
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280 }
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281
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282 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
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parents: 1080
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283 {
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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284 puts("M68K executed RESET");
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285 return context;
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
286 }
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
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287
1080
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288 jaguar_context *init_jaguar(uint16_t *bios, uint32_t bios_size, uint16_t *cart, uint32_t cart_size)
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289 {
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290 jaguar_context *system = calloc(1, sizeof(jaguar_context));
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291 system->bios = bios;
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292 system->bios_size = bios_size;
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293 system->cart = cart;
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294 system->cart_size = cart_size;
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295
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296 memmap_chunk *jag_m68k_map = calloc(8, sizeof(memmap_chunk));
1080
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297 for (uint32_t start = 0, index=0; index < 8; index++, start += 0x200000)
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298 {
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299 jag_m68k_map[index].start = start;
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300 jag_m68k_map[index].end = start + 0x200000;
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301 jag_m68k_map[index].mask = index ? 0x1FFFFF : 0xFFFFFF;
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parents:
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302 jag_m68k_map[index].aux_mask = bios_size - 1;
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303 jag_m68k_map[index].ptr_index = index;
1083
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diff changeset
304 jag_m68k_map[index].flags = MMAP_READ | MMAP_WRITE | MMAP_PTR_IDX | MMAP_FUNC_NULL | MMAP_AUX_BUFF | MMAP_CODE;
1080
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305 jag_m68k_map[index].buffer = bios;
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306 jag_m68k_map[index].read_16 = rom0_read_m68k;
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parents:
diff changeset
307 jag_m68k_map[index].read_8 = rom0_read_m68k_b;
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parents:
diff changeset
308 jag_m68k_map[index].write_16 = rom0_write_m68k;
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parents:
diff changeset
309 jag_m68k_map[index].write_8 = rom0_write_m68k_b;
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310 }
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parents:
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311 m68k_options *opts = malloc(sizeof(m68k_options));
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312 init_m68k_opts(opts, jag_m68k_map, 8, 2);
1083
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parents: 1080
diff changeset
313 system->m68k = init_68k_context(opts, handle_m68k_reset);
1080
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parents:
diff changeset
314 system->m68k->system = system;
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diff changeset
315 system->video = jag_video_init();
1080
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316 return system;
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diff changeset
317 }
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parents:
diff changeset
318
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diff changeset
319 //modified copy of the version in blastem.c
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diff changeset
320 uint16_t *load_rom(char * filename, uint32_t *size)
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
321 {
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
322 FILE * f = fopen(filename, "rb");
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
323 if (!f) {
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
324 return 0;
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
325 }
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
326 fseek(f, 0, SEEK_END);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
327 long filesize = ftell(f);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
328 fseek(f, 0, SEEK_SET);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
329
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
330 *size = nearest_pow2(filesize);
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parents:
diff changeset
331 uint16_t *cart = malloc(*size);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
332 if (filesize != fread(cart, 1, filesize, f)) {
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
333 fatal_error("Error reading from %s\n", filename);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
334 }
1083
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
335 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
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parents: 1080
diff changeset
336 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
Michael Pavone <pavone@retrodev.com>
parents: 1080
diff changeset
337 {
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
338 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
339 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
diff changeset
340 }
1080
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
341 while (filesize < *size)
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
342 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
343 cart[filesize / 2] = 0xFFFF;
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
344 filesize += 2;
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
345 }
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
346 fclose(f);
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
347 return cart;
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
348 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
349
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
350 //temporary main function until I clean up blastem.c
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
351 int main(int argc, char **argv)
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
352 {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
353 if (argc < 3) {
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
354 fputs("Usage: blastjag BIOS ROM\n", stderr);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
355 return 1;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
356 }
1085
bc86eaf6699d Fix some unresolved symbols when linking blastjag
Michael Pavone <pavone@retrodev.com>
parents: 1083
diff changeset
357 set_exe_str(argv[0]);
bc86eaf6699d Fix some unresolved symbols when linking blastjag
Michael Pavone <pavone@retrodev.com>
parents: 1083
diff changeset
358 config = load_config(argv[0]);
1080
382614130914 Some initial work on Atari Jaguar emulation
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parents:
diff changeset
359 uint32_t bios_size;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
360 uint16_t *bios = load_rom(argv[1], &bios_size);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
361 if (!bios_size) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
362 fatal_error("Failed to read BIOS from %s\n", argv[1]);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
363 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
364 uint32_t cart_size;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
365 uint16_t *cart = load_rom(argv[2], &cart_size);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
366 if (!bios_size) {
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
367 fatal_error("Failed to read cart from %s\n", argv[2]);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
368 }
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
369 jaguar_context *system = init_jaguar(bios, bios_size, cart, cart_size);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
370 m68k_reset(system->m68k);
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
371 return 0;
382614130914 Some initial work on Atari Jaguar emulation
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
372 }