Mercurial > repos > blastem
annotate blastem.c @ 357:fa7ea48be9a9
Allow VDP/PSG writes from Z80
author | Mike Pavone <pavone@retrodev.com> |
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date | Fri, 24 May 2013 00:26:27 -0700 |
parents | 79e4b466e7d0 |
children | 9498cfa7f7c8 |
rev | line source |
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1 #include "68kinst.h" |
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2 #include "m68k_to_x86.h" |
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3 #include "z80_to_x86.h" |
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4 #include "mem.h" |
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5 #include "vdp.h" |
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6 #include "render.h" |
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7 #include "blastem.h" |
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8 #include <stdio.h> |
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9 #include <stdlib.h> |
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10 #include <string.h> |
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11 |
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12 #define CARTRIDGE_WORDS 0x200000 |
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13 #define RAM_WORDS 32 * 1024 |
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14 #define Z80_RAM_BYTES 8 * 1024 |
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15 #define MCLKS_PER_68K 7 |
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16 #define MCLKS_PER_Z80 15 |
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17 #define MCLKS_PER_PSG (MCLKS_PER_Z80*16) |
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18 //TODO: Figure out the exact value for this |
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19 #define CYCLE_NEVER 0xFFFFFFFF |
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20 #define LINES_NTSC 262 |
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21 #define LINES_PAL 312 |
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22 |
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23 uint32_t mclks_per_frame = MCLKS_LINE*LINES_NTSC; |
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24 |
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25 uint16_t cart[CARTRIDGE_WORDS]; |
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26 uint16_t ram[RAM_WORDS]; |
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27 uint8_t z80_ram[Z80_RAM_BYTES]; |
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28 |
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29 io_port gamepad_1; |
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30 io_port gamepad_2; |
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31 |
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32 int headless = 0; |
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33 int z80_enabled = 1; |
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34 int frame_limit = 0; |
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35 |
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36 #ifndef MIN |
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37 #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
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38 #endif |
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39 |
166 | 40 #define SMD_HEADER_SIZE 512 |
41 #define SMD_MAGIC1 0x03 | |
42 #define SMD_MAGIC2 0xAA | |
43 #define SMD_MAGIC3 0xBB | |
44 #define SMD_BLOCK_SIZE 0x4000 | |
45 | |
46 int load_smd_rom(long filesize, FILE * f) | |
47 { | |
48 uint8_t block[SMD_BLOCK_SIZE]; | |
49 filesize -= SMD_HEADER_SIZE; | |
50 fseek(f, SMD_HEADER_SIZE, SEEK_SET); | |
51 | |
52 uint16_t * dst = cart; | |
53 while (filesize > 0) { | |
54 fread(block, 1, SMD_BLOCK_SIZE, f); | |
55 for (uint8_t *low = block, *high = (block+SMD_BLOCK_SIZE/2), *end = block+SMD_BLOCK_SIZE; high < end; high++, low++) { | |
56 *(dst++) = *high << 8 | *low; | |
57 } | |
58 filesize -= SMD_BLOCK_SIZE; | |
59 } | |
60 return 1; | |
61 } | |
62 | |
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63 int load_rom(char * filename) |
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64 { |
166 | 65 uint8_t header[10]; |
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66 FILE * f = fopen(filename, "rb"); |
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67 if (!f) { |
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68 return 0; |
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69 } |
166 | 70 fread(header, 1, sizeof(header), f); |
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71 fseek(f, 0, SEEK_END); |
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72 long filesize = ftell(f); |
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73 if (filesize/2 > CARTRIDGE_WORDS) { |
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74 //carts bigger than 4MB not currently supported |
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75 filesize = CARTRIDGE_WORDS*2; |
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76 } |
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77 fseek(f, 0, SEEK_SET); |
166 | 78 if (header[1] == SMD_MAGIC1 && header[8] == SMD_MAGIC2 && header[9] == SMD_MAGIC3) { |
79 int i; | |
80 for (i = 3; i < 8; i++) { | |
81 if (header[i] != 0) { | |
82 break; | |
83 } | |
84 } | |
85 if (i == 8) { | |
86 if (header[2]) { | |
87 fprintf(stderr, "%s is a split SMD ROM which is not currently supported", filename); | |
88 exit(1); | |
89 } | |
90 return load_smd_rom(filesize, f); | |
91 } | |
92 } | |
93 fread(cart, 2, filesize/2, f); | |
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94 fclose(f); |
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95 for(unsigned short * cur = cart; cur - cart < (filesize/2); ++cur) |
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96 { |
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97 *cur = (*cur >> 8) | (*cur << 8); |
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98 } |
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99 //TODO: Mirror ROM |
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100 return 1; |
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101 } |
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102 |
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103 uint16_t read_dma_value(uint32_t address) |
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104 { |
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105 //addresses here are word addresses (i.e. bit 0 corresponds to A1), so no need to do div by 2 |
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106 if (address < 0x200000) { |
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107 return cart[address]; |
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108 } else if(address >= 0x700000) { |
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109 return ram[address & 0x7FFF]; |
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110 } |
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111 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area |
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112 return 0; |
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113 } |
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114 |
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115 //TODO: Make these dependent on the video mode |
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116 //#define VINT_CYCLE ((MCLKS_LINE * 225 + (148 + 40) * 4)/MCLKS_PER_68K) |
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117 #define ZVINT_CYCLE ((MCLKS_LINE * 225 + (148 + 40) * 4)/MCLKS_PER_Z80) |
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118 //#define VINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_68K) |
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119 //#define ZVINT_CYCLE ((MCLKS_LINE * 226)/MCLKS_PER_Z80) |
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120 |
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121 void adjust_int_cycle(m68k_context * context, vdp_context * v_context) |
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122 { |
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123 context->int_cycle = CYCLE_NEVER; |
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124 if ((context->status & 0x7) < 6) { |
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125 uint32_t next_vint = vdp_next_vint(v_context); |
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126 if (next_vint != CYCLE_NEVER) { |
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127 next_vint /= MCLKS_PER_68K; |
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128 context->int_cycle = next_vint; |
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129 context->int_num = 6; |
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130 } |
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131 if ((context->status & 0x7) < 4) { |
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132 uint32_t next_hint = vdp_next_hint(v_context); |
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133 if (next_hint != CYCLE_NEVER) { |
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134 next_hint /= MCLKS_PER_68K; |
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135 if (next_hint < context->int_cycle) { |
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136 context->int_cycle = next_hint; |
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137 context->int_num = 4; |
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138 |
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139 } |
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140 } |
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141 } |
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142 } |
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143 |
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144 context->target_cycle = context->int_cycle < context->sync_cycle ? context->int_cycle : context->sync_cycle; |
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145 /*printf("Cyc: %d, Trgt: %d, Int Cyc: %d, Int: %d, Mask: %X, V: %d, H: %d, HICount: %d, HReg: %d, Line: %d\n", |
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146 context->current_cycle, context->target_cycle, context->int_cycle, context->int_num, (context->status & 0x7), |
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147 v_context->regs[REG_MODE_2] & 0x20, v_context->regs[REG_MODE_1] & 0x10, v_context->hint_counter, v_context->regs[REG_HINT], v_context->cycles / MCLKS_LINE);*/ |
186
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148 } |
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149 |
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150 int break_on_sync = 0; |
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151 |
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152 uint8_t reset = 1; |
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153 uint8_t need_reset = 0; |
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154 uint8_t busreq = 0; |
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155 uint8_t busack = 0; |
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156 uint32_t busack_cycle = CYCLE_NEVER; |
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157 uint8_t new_busack = 0; |
280 | 158 //#define DO_DEBUG_PRINT |
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159 #ifdef DO_DEBUG_PRINT |
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160 #define dprintf printf |
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161 #define dputs puts |
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162 #else |
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163 #define dprintf |
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164 #define dputs |
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165 #endif |
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166 |
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167 void sync_z80(z80_context * z_context, uint32_t mclks) |
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168 { |
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169 if (z80_enabled && !reset && !busreq) { |
333 | 170 genesis_context * gen = z_context->system; |
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171 if (need_reset) { |
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172 z80_reset(z_context); |
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173 need_reset = 0; |
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174 } |
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175 z_context->sync_cycle = mclks / MCLKS_PER_Z80; |
333 | 176 uint32_t vint_cycle = vdp_next_vint_z80(gen->vdp) / MCLKS_PER_Z80; |
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177 while (z_context->current_cycle < z_context->sync_cycle) { |
335 | 178 if (z_context->iff1 && z_context->current_cycle < vint_cycle) { |
179 z_context->int_cycle = vint_cycle < z_context->int_enable_cycle ? z_context->int_enable_cycle : vint_cycle; | |
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180 } |
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181 z_context->target_cycle = z_context->sync_cycle < z_context->int_cycle ? z_context->sync_cycle : z_context->int_cycle; |
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182 dprintf("Running Z80 from cycle %d to cycle %d. Native PC: %p\n", z_context->current_cycle, z_context->sync_cycle, z_context->native_pc); |
260
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183 z80_run(z_context); |
268
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184 dprintf("Z80 ran to cycle %d\n", z_context->current_cycle); |
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185 } |
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186 } else { |
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187 z_context->current_cycle = mclks / MCLKS_PER_Z80; |
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188 } |
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189 } |
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190 uint32_t frame=0; |
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191 m68k_context * sync_components(m68k_context * context, uint32_t address) |
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192 { |
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193 //TODO: Handle sync targets smaller than a single frame |
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194 genesis_context * gen = context->system; |
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195 vdp_context * v_context = gen->vdp; |
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196 z80_context * z_context = gen->z80; |
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197 uint32_t mclks = context->current_cycle * MCLKS_PER_68K; |
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198 sync_z80(z_context, mclks); |
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199 if (mclks >= mclks_per_frame) { |
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200 ym_run(gen->ym, context->current_cycle); |
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201 gen->ym->current_cycle -= mclks_per_frame/MCLKS_PER_68K; |
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202 //printf("reached frame end | 68K Cycles: %d, MCLK Cycles: %d\n", context->current_cycle, mclks); |
342
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203 vdp_run_context(v_context, mclks_per_frame); |
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204 psg_run(gen->psg, mclks/MCLKS_PER_PSG); |
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205 gen->psg->cycles -= mclks_per_frame/MCLKS_PER_PSG; |
215
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206 if (!headless) { |
338
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207 break_on_sync |= wait_render_frame(v_context, frame_limit); |
215
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208 } |
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209 frame++; |
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210 mclks -= mclks_per_frame; |
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211 vdp_adjust_cycles(v_context, mclks_per_frame); |
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212 io_adjust_cycles(&gamepad_1, context->current_cycle, mclks_per_frame/MCLKS_PER_68K); |
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213 io_adjust_cycles(&gamepad_2, context->current_cycle, mclks_per_frame/MCLKS_PER_68K); |
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214 if (busack_cycle != CYCLE_NEVER) { |
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215 if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) { |
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216 busack_cycle -= mclks_per_frame/MCLKS_PER_68K; |
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217 } else { |
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218 busack_cycle = CYCLE_NEVER; |
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219 busack = new_busack; |
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220 } |
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221 } |
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222 context->current_cycle -= mclks_per_frame/MCLKS_PER_68K; |
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223 if (z_context->current_cycle >= mclks_per_frame/MCLKS_PER_Z80) { |
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224 z_context->current_cycle -= mclks_per_frame/MCLKS_PER_Z80; |
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225 } else { |
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226 z_context->current_cycle = 0; |
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227 } |
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228 if (mclks) { |
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229 vdp_run_context(v_context, mclks); |
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230 } |
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231 } else { |
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232 //printf("running VDP for %d cycles\n", mclks - v_context->cycles); |
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233 vdp_run_context(v_context, mclks); |
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234 psg_run(gen->psg, mclks/MCLKS_PER_PSG); |
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235 } |
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236 if (context->int_ack) { |
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237 vdp_int_ack(v_context, context->int_ack); |
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238 context->int_ack = 0; |
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239 } |
186
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240 adjust_int_cycle(context, v_context); |
198
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241 if (break_on_sync && address) { |
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242 break_on_sync = 0; |
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243 debugger(context, address); |
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244 } |
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245 return context; |
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246 } |
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247 |
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248 m68k_context * vdp_port_write(uint32_t vdp_port, m68k_context * context, uint16_t value) |
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249 { |
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250 if (vdp_port & 0x2700E0) { |
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251 printf("machine freeze due to write to address %X\n", 0xC00000 | vdp_port); |
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252 exit(1); |
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253 } |
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254 vdp_port &= 0x1F; |
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255 //printf("vdp_port write: %X, value: %X, cycle: %d\n", vdp_port, value, context->current_cycle); |
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256 sync_components(context, 0); |
263
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257 vdp_context * v_context = context->video_context; |
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258 if (vdp_port < 0x10) { |
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259 int blocked; |
345
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260 uint32_t before_cycle = v_context->cycles; |
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261 if (vdp_port < 4) { |
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262 while (vdp_data_port_write(v_context, value) < 0) { |
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263 while(v_context->flags & FLAG_DMA_RUN) { |
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264 vdp_run_dma_done(v_context, mclks_per_frame); |
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265 if (v_context->cycles >= mclks_per_frame) { |
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266 if (!headless) { |
338
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267 wait_render_frame(v_context, frame_limit); |
215
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268 } |
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269 vdp_adjust_cycles(v_context, mclks_per_frame); |
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270 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); |
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271 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); |
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272 if (busack_cycle != CYCLE_NEVER) { |
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273 if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) { |
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274 busack_cycle -= mclks_per_frame/MCLKS_PER_68K; |
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275 } else { |
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276 busack_cycle = CYCLE_NEVER; |
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277 busack = new_busack; |
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278 } |
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279 } |
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280 } |
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281 } |
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282 context->current_cycle = v_context->cycles / MCLKS_PER_68K; |
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283 } |
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284 } else if(vdp_port < 8) { |
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285 blocked = vdp_control_port_write(v_context, value); |
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286 if (blocked) { |
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287 while (blocked) { |
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288 while(v_context->flags & FLAG_DMA_RUN) { |
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289 vdp_run_dma_done(v_context, mclks_per_frame); |
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290 if (v_context->cycles >= mclks_per_frame) { |
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291 if (!headless) { |
338
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292 wait_render_frame(v_context, frame_limit); |
215
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293 } |
342
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294 vdp_adjust_cycles(v_context, mclks_per_frame); |
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295 io_adjust_cycles(&gamepad_1, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); |
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296 io_adjust_cycles(&gamepad_2, v_context->cycles/MCLKS_PER_68K, mclks_per_frame/MCLKS_PER_68K); |
344
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297 if (busack_cycle != CYCLE_NEVER) { |
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298 if (busack_cycle > mclks_per_frame/MCLKS_PER_68K) { |
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299 busack_cycle -= mclks_per_frame/MCLKS_PER_68K; |
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300 } else { |
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301 busack_cycle = CYCLE_NEVER; |
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302 busack = new_busack; |
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303 } |
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304 } |
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305 } |
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306 } |
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307 if (blocked < 0) { |
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308 blocked = vdp_control_port_write(v_context, value); |
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309 } else { |
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310 blocked = 0; |
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311 } |
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312 } |
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313 context->current_cycle = v_context->cycles / MCLKS_PER_68K; |
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314 } else { |
186
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315 adjust_int_cycle(context, v_context); |
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316 } |
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317 } else { |
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318 printf("Illegal write to HV Counter port %X\n", vdp_port); |
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319 exit(1); |
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320 } |
345
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321 if (v_context->cycles != before_cycle) { |
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322 context->current_cycle = v_context->cycles / MCLKS_PER_68K; |
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323 } |
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324 } else if (vdp_port < 0x18) { |
354
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325 genesis_context * gen = context->system; |
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326 psg_run(gen->psg, (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_PSG); |
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327 psg_write(gen->psg, value); |
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328 } else { |
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329 //TODO: Implement undocumented test register(s) |
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330 } |
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331 return context; |
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332 } |
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333 |
343
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334 m68k_context * vdp_port_write_b(uint32_t vdp_port, m68k_context * context, uint8_t value) |
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335 { |
357
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336 return vdp_port_write(vdp_port, context, vdp_port < 0x10 ? value | value << 8 : ((vdp_port & 1) ? value : 0)); |
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337 } |
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338 |
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339 z80_context * z80_vdp_port_write(uint16_t vdp_port, z80_context * context, uint8_t value) |
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340 { |
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341 genesis_context * gen = context->system; |
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342 vdp_port_write_b(vdp_port, gen->m68k, value); |
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343 return context; |
343
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344 } |
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345 |
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346 uint16_t vdp_port_read(uint32_t vdp_port, m68k_context * context) |
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347 { |
343
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348 if (vdp_port & 0x2700E0) { |
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349 printf("machine freeze due to read from address %X\n", 0xC00000 | vdp_port); |
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350 exit(1); |
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351 } |
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352 vdp_port &= 0x1F; |
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353 uint16_t value; |
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354 sync_components(context, 0); |
263
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355 vdp_context * v_context = context->video_context; |
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356 if (vdp_port < 0x10) { |
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357 if (vdp_port < 4) { |
343
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358 value = vdp_data_port_read(v_context); |
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359 } else if(vdp_port < 8) { |
343
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360 value = vdp_control_port_read(v_context); |
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361 } else { |
343
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362 value = vdp_hv_counter_read(v_context); |
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363 //printf("HV Counter: %X at cycle %d\n", value, v_context->cycles); |
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364 } |
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365 context->current_cycle = v_context->cycles/MCLKS_PER_68K; |
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366 } else { |
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367 printf("Illegal read from PSG or test register port %X\n", vdp_port); |
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368 exit(1); |
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369 } |
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370 return value; |
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371 } |
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372 |
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373 uint8_t vdp_port_read_b(uint32_t vdp_port, m68k_context * context) |
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374 { |
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375 uint16_t value = vdp_port_read(vdp_port, context); |
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376 if (vdp_port & 1) { |
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377 return value; |
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378 } else { |
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379 return value >> 8; |
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380 } |
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381 } |
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382 |
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383 #define TH 0x40 |
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384 #define TH_TIMEOUT 8000 |
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385 |
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386 void io_adjust_cycles(io_port * pad, uint32_t current_cycle, uint32_t deduction) |
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387 { |
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388 /*uint8_t control = pad->control | 0x80; |
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389 uint8_t th = control & pad->output; |
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390 if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) { |
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391 printf("adjust_cycles | control: %X, TH: %X, GAMEPAD_TH0: %X, GAMEPAD_TH1: %X, TH Counter: %d, Timeout: %d, Cycle: %d\n", control, th, pad->input[GAMEPAD_TH0], pad->input[GAMEPAD_TH1], pad->th_counter,pad->timeout_cycle, current_cycle); |
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392 }*/ |
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393 if (current_cycle >= pad->timeout_cycle) { |
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394 pad->th_counter = 0; |
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395 } else { |
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396 pad->timeout_cycle -= deduction; |
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397 } |
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398 if (busack_cycle < CYCLE_NEVER && current_cycle < busack_cycle) { |
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399 busack_cycle -= deduction; |
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400 } |
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401 } |
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402 |
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403 void io_data_write(io_port * pad, m68k_context * context, uint8_t value) |
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404 { |
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405 if (pad->control & TH) { |
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406 //check if TH has changed |
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407 if ((pad->output & TH) ^ (value & TH)) { |
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408 if (context->current_cycle >= pad->timeout_cycle) { |
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409 pad->th_counter = 0; |
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410 } |
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411 if (!(value & TH)) { |
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412 pad->th_counter++; |
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413 } |
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414 pad->timeout_cycle = context->current_cycle + TH_TIMEOUT; |
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415 } |
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416 } |
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417 pad->output = value; |
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418 } |
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419 |
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420 uint8_t io_data_read(io_port * pad, m68k_context * context) |
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421 { |
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422 uint8_t control = pad->control | 0x80; |
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423 uint8_t th = control & pad->output; |
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424 uint8_t input; |
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425 if (context->current_cycle >= pad->timeout_cycle) { |
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426 pad->th_counter = 0; |
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427 } |
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428 /*if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) { |
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429 printf("io_data_read | control: %X, TH: %X, GAMEPAD_TH0: %X, GAMEPAD_TH1: %X, TH Counter: %d, Timeout: %d, Cycle: %d\n", control, th, pad->input[GAMEPAD_TH0], pad->input[GAMEPAD_TH1], pad->th_counter,pad->timeout_cycle, context->current_cycle); |
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430 }*/ |
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431 if (th) { |
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432 if (pad->th_counter == 3) { |
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433 input = pad->input[GAMEPAD_EXTRA]; |
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434 } else { |
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435 input = pad->input[GAMEPAD_TH1]; |
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436 } |
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437 } else { |
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438 if (pad->th_counter == 3) { |
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439 input = pad->input[GAMEPAD_TH0] | 0xF; |
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440 } else if(pad->th_counter == 4) { |
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441 input = pad->input[GAMEPAD_TH0] & 0x30; |
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442 } else { |
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443 input = pad->input[GAMEPAD_TH0] | 0xC; |
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444 } |
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445 } |
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446 uint8_t value = ((~input) & (~control)) | (pad->output & control); |
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447 /*if (pad->input[GAMEPAD_TH0] || pad->input[GAMEPAD_TH1]) { |
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448 printf ("value: %X\n", value); |
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449 }*/ |
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450 return value; |
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451 } |
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452 |
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453 uint32_t zram_counter = 0; |
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454 #define Z80_ACK_DELAY 3 |
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455 #define Z80_BUSY_DELAY 1//TODO: Find the actual value for this |
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456 #define Z80_REQ_BUSY 1 |
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457 #define Z80_REQ_ACK 0 |
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458 #define Z80_RES_BUSACK reset |
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459 |
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460 m68k_context * io_write(uint32_t location, m68k_context * context, uint8_t value) |
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461 { |
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462 genesis_context * gen = context->system; |
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463 if (location < 0x10000) { |
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464 if (busack_cycle <= context->current_cycle) { |
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465 busack = new_busack; |
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466 busack_cycle = CYCLE_NEVER; |
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467 } |
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468 if (!(busack || reset)) { |
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469 location &= 0x7FFF; |
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470 if (location < 0x4000) { |
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471 z80_ram[location & 0x1FFF] = value; |
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472 z80_handle_code_write(location & 0x1FFF, gen->z80); |
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473 } else if (location < 0x6000) { |
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474 ym_run(gen->ym, context->current_cycle); |
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475 if (location & 1) { |
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476 ym_data_write(gen->ym, value); |
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477 } else if(location & 2) { |
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478 ym_address_write_part2(gen->ym, value); |
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479 } else { |
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480 ym_address_write_part1(gen->ym, value); |
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481 } |
153
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482 } |
88
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diff
changeset
|
483 } |
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|
484 } else { |
153
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485 location &= 0x1FFF; |
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|
486 if (location < 0x100) { |
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diff
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|
487 switch(location/2) |
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diff
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|
488 { |
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|
489 case 0x1: |
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|
490 io_data_write(&gamepad_1, context, value); |
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|
491 break; |
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|
492 case 0x2: |
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|
493 io_data_write(&gamepad_2, context, value); |
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149
diff
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|
494 break; |
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diff
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|
495 case 0x3://PORT C Data |
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diff
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|
496 break; |
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diff
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|
497 case 0x4: |
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diff
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|
498 gamepad_1.control = value; |
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|
499 break; |
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|
500 case 0x5: |
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|
501 gamepad_2.control = value; |
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|
502 break; |
88
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|
503 } |
153
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|
504 } else { |
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|
505 if (location == 0x1100) { |
288
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506 sync_z80(gen->z80, context->current_cycle * MCLKS_PER_68K); |
336
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507 if (busack_cycle <= context->current_cycle) { |
153
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508 busack = new_busack; |
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|
509 busack_cycle = CYCLE_NEVER; |
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|
510 } |
153
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|
511 if (value & 1) { |
271
969ee17471c5
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|
512 dputs("bus requesting Z80"); |
336
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diff
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|
513 |
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diff
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|
514 if(!reset && !busreq) { |
289
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|
515 busack_cycle = ((gen->z80->current_cycle + Z80_ACK_DELAY) * MCLKS_PER_Z80) / MCLKS_PER_68K;//context->current_cycle + Z80_ACK_DELAY; |
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288
diff
changeset
|
516 new_busack = Z80_REQ_ACK; |
336
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diff
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|
517 busreq = 1; |
153
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|
518 } |
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|
519 } else { |
260
625f8e4d5fd2
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215
diff
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|
520 if (busreq) { |
271
969ee17471c5
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268
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|
521 dputs("releasing z80 bus"); |
280 | 522 #ifdef DO_DEBUG_PRINT |
279
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276
diff
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|
523 char fname[20]; |
6be6056735a9
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276
diff
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|
524 sprintf(fname, "zram-%d", zram_counter++); |
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276
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525 FILE * f = fopen(fname, "wb"); |
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276
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526 fwrite(z80_ram, 1, sizeof(z80_ram), f); |
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|
527 fclose(f); |
280 | 528 #endif |
336
87b65e5ce1ab
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diff
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|
529 busack_cycle = ((gen->z80->current_cycle + Z80_BUSY_DELAY) * MCLKS_PER_Z80) / MCLKS_PER_68K; |
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diff
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|
530 new_busack = Z80_REQ_BUSY; |
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|
531 busreq = 0; |
260
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diff
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|
532 } |
289
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Mike Pavone <pavone@retrodev.com>
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288
diff
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|
533 //busack_cycle = CYCLE_NEVER; |
1cc0850ab6bc
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|
534 //busack = Z80_REQ_BUSY; |
336
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diff
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|
535 |
88
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|
536 } |
153
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149
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|
537 } else if (location == 0x1200) { |
288
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|
538 sync_z80(gen->z80, context->current_cycle * MCLKS_PER_68K); |
153
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diff
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|
539 if (value & 1) { |
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149
diff
changeset
|
540 if (reset && busreq) { |
42c031184e8a
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diff
changeset
|
541 new_busack = 0; |
289
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288
diff
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|
542 busack_cycle = ((gen->z80->current_cycle + Z80_ACK_DELAY) * MCLKS_PER_Z80) / MCLKS_PER_68K;//context->current_cycle + Z80_ACK_DELAY; |
153
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149
diff
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|
543 } |
260
625f8e4d5fd2
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215
diff
changeset
|
544 //TODO: Deal with the scenario in which reset is not asserted long enough |
625f8e4d5fd2
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215
diff
changeset
|
545 if (reset) { |
625f8e4d5fd2
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215
diff
changeset
|
546 need_reset = 1; |
625f8e4d5fd2
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215
diff
changeset
|
547 //TODO: Add necessary delay between release of reset and start of execution |
288
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
548 gen->z80->current_cycle = (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80; |
260
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diff
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|
549 } |
153
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149
diff
changeset
|
550 reset = 0; |
42c031184e8a
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Mike Pavone <pavone@retrodev.com>
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149
diff
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|
551 } else { |
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149
diff
changeset
|
552 reset = 1; |
42c031184e8a
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149
diff
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|
553 } |
88
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
554 } |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
555 } |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
556 } |
c339559f1d4f
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
557 return context; |
c339559f1d4f
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
558 } |
c339559f1d4f
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
559 |
c339559f1d4f
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
560 m68k_context * io_write_w(uint32_t location, m68k_context * context, uint16_t value) |
c339559f1d4f
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Mike Pavone <pavone@retrodev.com>
parents:
diff
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|
561 { |
288
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Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
562 genesis_context * gen = context->system; |
153
42c031184e8a
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parents:
149
diff
changeset
|
563 if (location < 0x10000) { |
336
87b65e5ce1ab
Fix a stupid bug in z80 busreq acknowledge delay code and make some small improvements there too
Mike Pavone <pavone@retrodev.com>
parents:
335
diff
changeset
|
564 if (busack_cycle <= context->current_cycle) { |
153
42c031184e8a
Implement access to Z80 RAM
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149
diff
changeset
|
565 busack = new_busack; |
42c031184e8a
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diff
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|
566 busack_cycle = CYCLE_NEVER; |
42c031184e8a
Implement access to Z80 RAM
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parents:
149
diff
changeset
|
567 } |
42c031184e8a
Implement access to Z80 RAM
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149
diff
changeset
|
568 if (!(busack || reset)) { |
42c031184e8a
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parents:
149
diff
changeset
|
569 location &= 0x7FFF; |
42c031184e8a
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parents:
149
diff
changeset
|
570 if (location < 0x4000) { |
42c031184e8a
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149
diff
changeset
|
571 z80_ram[location & 0x1FFE] = value >> 8; |
288
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
572 z80_handle_code_write(location & 0x1FFE, gen->z80); |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
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|
573 } else if (location < 0x6000) { |
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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parents:
280
diff
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|
574 ym_run(gen->ym, context->current_cycle); |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
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|
575 if (location & 1) { |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
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|
576 ym_data_write(gen->ym, value >> 8); |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
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|
577 } else if(location & 2) { |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
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|
578 ym_address_write_part2(gen->ym, value >> 8); |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
579 } else { |
a8ee7934a1f8
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Mike Pavone <pavone@retrodev.com>
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280
diff
changeset
|
580 ym_address_write_part1(gen->ym, value >> 8); |
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
581 } |
153
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149
diff
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|
582 } |
88
c339559f1d4f
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 } |
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Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
584 } else { |
153
42c031184e8a
Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents:
149
diff
changeset
|
585 location &= 0x1FFF; |
42c031184e8a
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Mike Pavone <pavone@retrodev.com>
parents:
149
diff
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|
586 if (location < 0x100) { |
42c031184e8a
Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents:
149
diff
changeset
|
587 switch(location/2) |
42c031184e8a
Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents:
149
diff
changeset
|
588 { |
42c031184e8a
Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
parents:
149
diff
changeset
|
589 case 0x1: |
42c031184e8a
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149
diff
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|
590 io_data_write(&gamepad_1, context, value); |
42c031184e8a
Implement access to Z80 RAM
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149
diff
changeset
|
591 break; |
42c031184e8a
Implement access to Z80 RAM
Mike Pavone <pavone@retrodev.com>
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149
diff
changeset
|
592 case 0x2: |
42c031184e8a
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Mike Pavone <pavone@retrodev.com>
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149
diff
changeset
|
593 io_data_write(&gamepad_2, context, value); |
42c031184e8a
Implement access to Z80 RAM
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149
diff
changeset
|
594 break; |
42c031184e8a
Implement access to Z80 RAM
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149
diff
changeset
|
595 case 0x3://PORT C Data |
42c031184e8a
Implement access to Z80 RAM
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parents:
149
diff
changeset
|
596 break; |
42c031184e8a
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parents:
149
diff
changeset
|
597 case 0x4: |
42c031184e8a
Implement access to Z80 RAM
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149
diff
changeset
|
598 gamepad_1.control = value; |
42c031184e8a
Implement access to Z80 RAM
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parents:
149
diff
changeset
|
599 break; |
42c031184e8a
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parents:
149
diff
changeset
|
600 case 0x5: |
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601 gamepad_2.control = value; |
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602 break; |
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603 } |
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604 } else { |
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605 //printf("IO Write of %X to %X @ %d\n", value, location, context->current_cycle); |
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606 if (location == 0x1100) { |
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607 sync_z80(gen->z80, context->current_cycle * MCLKS_PER_68K); |
336
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608 if (busack_cycle <= context->current_cycle) { |
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609 busack = new_busack; |
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610 busack_cycle = CYCLE_NEVER; |
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611 } |
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612 if (value & 0x100) { |
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613 dprintf("bus requesting Z80 @ %d\n", (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80); |
336
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614 |
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615 if(!reset && !busreq) { |
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616 busack_cycle = ((gen->z80->current_cycle + Z80_ACK_DELAY) * MCLKS_PER_Z80) / MCLKS_PER_68K;//context->current_cycle + Z80_ACK_DELAY; |
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617 new_busack = Z80_REQ_ACK; |
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618 busreq = 1; |
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619 } |
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620 } else { |
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621 if (busreq) { |
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622 dprintf("releasing Z80 bus @ %d\n", (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80); |
280 | 623 #ifdef DO_DEBUG_PRINT |
279
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624 char fname[20]; |
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625 sprintf(fname, "zram-%d", zram_counter++); |
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626 FILE * f = fopen(fname, "wb"); |
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627 fwrite(z80_ram, 1, sizeof(z80_ram), f); |
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628 fclose(f); |
280 | 629 #endif |
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630 busack_cycle = ((gen->z80->current_cycle + Z80_BUSY_DELAY) * MCLKS_PER_Z80) / MCLKS_PER_68K; |
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631 new_busack = Z80_REQ_BUSY; |
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632 busreq = 0; |
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633 } |
289
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634 //busack_cycle = CYCLE_NEVER; |
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635 //busack = Z80_REQ_BUSY; |
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636 } |
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637 } else if (location == 0x1200) { |
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638 sync_z80(gen->z80, context->current_cycle * MCLKS_PER_68K); |
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639 if (value & 0x100) { |
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640 if (reset && busreq) { |
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641 new_busack = 0; |
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642 busack_cycle = ((gen->z80->current_cycle + Z80_ACK_DELAY) * MCLKS_PER_Z80) / MCLKS_PER_68K;//context->current_cycle + Z80_ACK_DELAY; |
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643 } |
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644 //TODO: Deal with the scenario in which reset is not asserted long enough |
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645 if (reset) { |
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646 need_reset = 1; |
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647 //TODO: Add necessary delay between release of reset and start of execution |
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648 gen->z80->current_cycle = (context->current_cycle * MCLKS_PER_68K) / MCLKS_PER_Z80; |
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649 } |
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650 reset = 0; |
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651 } else { |
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652 reset = 1; |
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653 } |
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654 } |
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655 } |
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656 } |
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657 return context; |
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658 } |
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659 |
130
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660 #define USA 0x80 |
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661 #define JAP 0x00 |
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662 #define EUR 0xC0 |
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663 #define NO_DISK 0x20 |
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664 uint8_t version_reg = NO_DISK | USA; |
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665 |
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666 uint8_t io_read(uint32_t location, m68k_context * context) |
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667 { |
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668 uint8_t value; |
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669 genesis_context *gen = context->system; |
153
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670 if (location < 0x10000) { |
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671 if (busack_cycle <= context->current_cycle) { |
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672 busack = new_busack; |
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673 busack_cycle = CYCLE_NEVER; |
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674 } |
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675 if (!(busack==Z80_REQ_BUSY || reset)) { |
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676 location &= 0x7FFF; |
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677 if (location < 0x4000) { |
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678 value = z80_ram[location & 0x1FFF]; |
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679 } else if (location < 0x6000) { |
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680 ym_run(gen->ym, context->current_cycle); |
343
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681 value = ym_read_status(gen->ym); |
153
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682 } else { |
343
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683 value = 0xFF; |
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684 } |
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685 } else { |
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686 value = 0xFF; |
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|
687 } |
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688 } else { |
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689 location &= 0x1FFF; |
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690 if (location < 0x100) { |
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691 switch(location/2) |
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|
692 { |
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|
693 case 0x0: |
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|
694 //version bits should be 0 for now since we're not emulating TMSS |
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695 value = version_reg; |
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|
696 break; |
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|
697 case 0x1: |
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|
698 value = io_data_read(&gamepad_1, context); |
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|
699 break; |
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|
700 case 0x2: |
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|
701 value = io_data_read(&gamepad_2, context); |
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|
702 break; |
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|
703 case 0x3://PORT C Data |
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|
704 break; |
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705 case 0x4: |
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706 value = gamepad_1.control; |
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|
707 break; |
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|
708 case 0x5: |
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709 value = gamepad_2.control; |
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|
710 break; |
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|
711 default: |
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|
712 value = 0xFF; |
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713 } |
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714 } else { |
343
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|
715 if (location == 0x1100) { |
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|
716 if (busack_cycle <= context->current_cycle) { |
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|
717 busack = new_busack; |
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|
718 busack_cycle = CYCLE_NEVER; |
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|
719 } |
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720 value = Z80_RES_BUSACK || busack; |
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721 dprintf("Byte read of BUSREQ returned %d @ %d (reset: %d, busack: %d, busack_cycle %d)\n", value, context->current_cycle, reset, busack, busack_cycle); |
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722 } else if (location == 0x1200) { |
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723 value = !reset; |
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|
724 } else { |
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725 value = 0xFF; |
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726 printf("Byte read of unknown IO location: %X\n", location); |
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727 } |
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|
728 } |
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|
729 } |
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|
730 return value; |
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|
731 } |
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|
732 |
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733 uint16_t io_read_w(uint32_t location, m68k_context * context) |
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734 { |
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735 uint16_t value; |
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736 genesis_context * gen = context->system; |
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737 if (location < 0x10000) { |
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738 if (busack_cycle <= context->current_cycle) { |
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739 busack = new_busack; |
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740 busack_cycle = CYCLE_NEVER; |
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741 } |
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742 if (!(busack==Z80_REQ_BUSY || reset)) { |
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743 location &= 0x7FFF; |
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744 if (location < 0x4000) { |
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745 value = z80_ram[location & 0x1FFE]; |
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746 } else if (location < 0x6000) { |
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747 ym_run(gen->ym, context->current_cycle); |
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748 value = ym_read_status(gen->ym); |
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749 } else { |
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750 value = 0xFF; |
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751 } |
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752 value = value | (value << 8); |
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753 } else { |
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754 value = 0xFFFF; |
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755 } |
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756 } else { |
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757 location &= 0x1FFF; |
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758 if (location < 0x100) { |
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759 switch(location/2) |
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760 { |
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761 case 0x0: |
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762 //version bits should be 0 for now since we're not emulating TMSS |
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763 //Not sure about the other bits |
343
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764 value = version_reg; |
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765 break; |
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766 case 0x1: |
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767 value = io_data_read(&gamepad_1, context); |
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768 break; |
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769 case 0x2: |
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770 value = io_data_read(&gamepad_2, context); |
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771 break; |
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772 case 0x3://PORT C Data |
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773 break; |
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774 case 0x4: |
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775 value = gamepad_1.control; |
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776 break; |
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777 case 0x5: |
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778 value = gamepad_2.control; |
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|
779 break; |
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780 case 0x6: |
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781 //PORT C Control |
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|
782 value = 0; |
153
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783 break; |
343
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|
784 default: |
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|
785 value = 0; |
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|
786 } |
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787 value = value | (value << 8); |
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788 //printf("Word read to %X returned %d\n", location, value); |
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789 } else { |
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|
790 if (location == 0x1100) { |
336
87b65e5ce1ab
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|
791 if (busack_cycle <= context->current_cycle) { |
153
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792 busack = new_busack; |
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|
793 busack_cycle = CYCLE_NEVER; |
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794 } |
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795 value = (Z80_RES_BUSACK || busack) << 8; |
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796 //printf("Word read of BUSREQ returned %d\n", value); |
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797 } else if (location == 0x1200) { |
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798 value = (!reset) << 8; |
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|
799 } else { |
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800 printf("Word read of unknown IO location: %X\n", location); |
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801 } |
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|
802 } |
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|
803 } |
343
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|
804 return value; |
88
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|
805 } |
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|
806 |
290
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|
807 z80_context * z80_write_ym(uint16_t location, z80_context * context, uint8_t value) |
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|
808 { |
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|
809 genesis_context * gen = context->system; |
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|
810 ym_run(gen->ym, (context->current_cycle * MCLKS_PER_Z80) / MCLKS_PER_68K); |
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|
811 if (location & 1) { |
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|
812 ym_data_write(gen->ym, value); |
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|
813 } else if (location & 2) { |
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|
814 ym_address_write_part2(gen->ym, value); |
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|
815 } else { |
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|
816 ym_address_write_part1(gen->ym, value); |
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|
817 } |
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|
818 return context; |
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|
819 } |
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|
820 |
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|
821 uint8_t z80_read_ym(uint16_t location, z80_context * context) |
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822 { |
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|
823 genesis_context * gen = context->system; |
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824 ym_run(gen->ym, (context->current_cycle * MCLKS_PER_Z80) / MCLKS_PER_68K); |
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|
825 return ym_read_status(gen->ym); |
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|
826 } |
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|
827 |
351
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|
828 uint16_t read_sram_w(uint32_t address, m68k_context * context) |
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|
829 { |
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|
830 genesis_context * gen = context->system; |
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|
831 address &= gen->save_ram_mask; |
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|
832 switch(gen->save_flags) |
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|
833 { |
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diff
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|
834 case RAM_FLAG_BOTH: |
2f264d2a60c2
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|
835 return gen->save_ram[address] << 8 | gen->save_ram[address+1]; |
2f264d2a60c2
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|
836 case RAM_FLAG_EVEN: |
2f264d2a60c2
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|
837 return gen->save_ram[address >> 1] << 8 | 0xFF; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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parents:
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changeset
|
838 case RAM_FLAG_ODD: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
839 return gen->save_ram[address >> 1] | 0xFF00; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
840 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
841 return 0xFFFF;//We should never get here |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
842 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
843 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
844 uint8_t read_sram_b(uint32_t address, m68k_context * context) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
845 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
846 genesis_context * gen = context->system; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
847 address &= gen->save_ram_mask; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
848 switch(gen->save_flags) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
849 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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changeset
|
850 case RAM_FLAG_BOTH: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
851 return gen->save_ram[address]; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
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changeset
|
852 case RAM_FLAG_EVEN: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
853 if (address & 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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changeset
|
854 return 0xFF; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
855 } else { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
856 return gen->save_ram[address >> 1]; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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parents:
346
diff
changeset
|
857 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
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346
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changeset
|
858 case RAM_FLAG_ODD: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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changeset
|
859 if (address & 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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changeset
|
860 return gen->save_ram[address >> 1]; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
861 } else { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
862 return 0xFF; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
863 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
864 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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changeset
|
865 return 0xFF;//We should never get here |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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parents:
346
diff
changeset
|
866 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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diff
changeset
|
867 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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changeset
|
868 m68k_context * write_sram_area_w(uint32_t address, m68k_context * context, uint16_t value) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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parents:
346
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changeset
|
869 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
870 genesis_context * gen = context->system; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
871 if ((gen->bank_regs[0] & 0x3) == 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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parents:
346
diff
changeset
|
872 address &= gen->save_ram_mask; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
873 switch(gen->save_flags) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
874 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
875 case RAM_FLAG_BOTH: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
876 gen->save_ram[address] = value >> 8; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
877 gen->save_ram[address+1] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
878 break; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
879 case RAM_FLAG_EVEN: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
880 gen->save_ram[address >> 1] = value >> 8; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
881 break; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
882 case RAM_FLAG_ODD: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
883 gen->save_ram[address >> 1] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
884 break; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
885 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
886 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
887 return context; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
888 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
889 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
890 m68k_context * write_sram_area_b(uint32_t address, m68k_context * context, uint8_t value) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
891 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
892 genesis_context * gen = context->system; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
893 if ((gen->bank_regs[0] & 0x3) == 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
894 address &= gen->save_ram_mask; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
895 switch(gen->save_flags) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
896 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
897 case RAM_FLAG_BOTH: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
898 gen->save_ram[address] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
899 break; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
900 case RAM_FLAG_EVEN: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
901 if (!(address & 1)) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
902 gen->save_ram[address >> 1] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
903 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
904 break; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
905 case RAM_FLAG_ODD: |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
906 if (address & 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
907 gen->save_ram[address >> 1] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
908 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
909 break; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
910 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
911 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
912 return context; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
913 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
914 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
915 m68k_context * write_bank_reg_w(uint32_t address, m68k_context * context, uint16_t value) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
916 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
917 genesis_context * gen = context->system; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
918 address &= 0xE; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
919 address >>= 1; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
920 gen->bank_regs[address] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
921 if (!address) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
922 if (value & 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
923 context->mem_pointers[2] = NULL; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
924 } else { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
925 context->mem_pointers[2] = cart + 0x200000/2; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
926 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
927 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
928 return context; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
929 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
930 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
931 m68k_context * write_bank_reg_b(uint32_t address, m68k_context * context, uint8_t value) |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
932 { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
933 if (address & 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
934 genesis_context * gen = context->system; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
935 address &= 0xE; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
936 address >>= 1; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
937 gen->bank_regs[address] = value; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
changeset
|
938 if (!address) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
parents:
346
diff
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|
939 if (value & 1) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
940 context->mem_pointers[2] = NULL; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
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346
diff
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|
941 } else { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
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346
diff
changeset
|
942 context->mem_pointers[2] = cart + 0x200000/2; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
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346
diff
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|
943 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
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346
diff
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|
944 } |
2f264d2a60c2
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Mike Pavone <pavone@retrodev.com>
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346
diff
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|
945 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
Mike Pavone <pavone@retrodev.com>
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346
diff
changeset
|
946 return context; |
2f264d2a60c2
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parents:
346
diff
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|
947 } |
2f264d2a60c2
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Mike Pavone <pavone@retrodev.com>
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346
diff
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|
948 |
184
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
949 typedef struct bp_def { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
950 struct bp_def * next; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
951 uint32_t address; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
952 uint32_t index; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
953 } bp_def; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
954 |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
diff
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|
955 bp_def * breakpoints = NULL; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
956 uint32_t bp_index = 0; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
957 |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
958 bp_def ** find_breakpoint(bp_def ** cur, uint32_t address) |
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|
959 { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
960 while (*cur) { |
ebcbdd1c4cc8
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|
961 if ((*cur)->address == address) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
962 break; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
963 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
964 cur = &((*cur)->next); |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
965 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
966 return cur; |
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|
967 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
968 |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
969 bp_def ** find_breakpoint_idx(bp_def ** cur, uint32_t index) |
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|
970 { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
971 while (*cur) { |
ebcbdd1c4cc8
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|
972 if ((*cur)->index == index) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
973 break; |
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|
974 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
975 cur = &((*cur)->next); |
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Mike Pavone <pavone@retrodev.com>
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976 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
977 return cur; |
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|
978 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
979 |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
980 char * find_param(char * buf) |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
981 { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
982 for (; *buf; buf++) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
983 if (*buf == ' ') { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
984 if (*(buf+1)) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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changeset
|
985 return buf+1; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
986 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
987 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
988 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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parents:
166
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|
989 return NULL; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
990 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
991 |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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changeset
|
992 void strip_nl(char * buf) |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
diff
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|
993 { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
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|
994 for(; *buf; buf++) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
995 if (*buf == '\n') { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
996 *buf = 0; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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changeset
|
997 return; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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changeset
|
998 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
diff
changeset
|
999 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
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|
1000 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
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|
1001 |
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Mike Pavone <pavone@retrodev.com>
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166
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changeset
|
1002 m68k_context * debugger(m68k_context * context, uint32_t address) |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1003 { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
1004 static char last_cmd[1024]; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1005 char input_buf[1024]; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1006 static uint32_t branch_t; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1007 static uint32_t branch_f; |
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|
1008 m68kinst inst; |
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1009 //probably not necessary, but let's play it safe |
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|
1010 address &= 0xFFFFFF; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1011 if (address == branch_t) { |
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|
1012 bp_def ** f_bp = find_breakpoint(&breakpoints, branch_f); |
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1013 if (!*f_bp) { |
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|
1014 remove_breakpoint(context, branch_f); |
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1015 } |
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|
1016 branch_t = branch_f = 0; |
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1017 } else if(address == branch_f) { |
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|
1018 bp_def ** t_bp = find_breakpoint(&breakpoints, branch_t); |
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|
1019 if (!*t_bp) { |
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|
1020 remove_breakpoint(context, branch_t); |
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1021 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1022 branch_t = branch_f = 0; |
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1023 } |
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|
1024 //Check if this is a user set breakpoint, or just a temporary one |
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|
1025 bp_def ** this_bp = find_breakpoint(&breakpoints, address); |
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|
1026 if (*this_bp) { |
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|
1027 printf("Breakpoint %d hit\n", (*this_bp)->index); |
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|
1028 } else { |
ebcbdd1c4cc8
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|
1029 remove_breakpoint(context, address); |
ebcbdd1c4cc8
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|
1030 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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changeset
|
1031 uint16_t * pc; |
ebcbdd1c4cc8
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changeset
|
1032 if (address < 0x400000) { |
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changeset
|
1033 pc = cart + address/2; |
ebcbdd1c4cc8
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|
1034 } else if(address > 0xE00000) { |
ebcbdd1c4cc8
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changeset
|
1035 pc = ram + (address & 0xFFFF)/2; |
ebcbdd1c4cc8
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|
1036 } else { |
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|
1037 fprintf(stderr, "Entered debugger at address %X\n", address); |
ebcbdd1c4cc8
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|
1038 exit(1); |
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|
1039 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1040 uint16_t * after_pc = m68k_decode(pc, &inst, address); |
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|
1041 m68k_disasm(&inst, input_buf); |
ebcbdd1c4cc8
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|
1042 printf("%X: %s\n", address, input_buf); |
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|
1043 uint32_t after = address + (after_pc-pc)*2; |
ebcbdd1c4cc8
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|
1044 int debugging = 1; |
ebcbdd1c4cc8
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|
1045 while (debugging) { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1046 fputs(">", stdout); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1047 if (!fgets(input_buf, sizeof(input_buf), stdin)) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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changeset
|
1048 fputs("fgets failed", stderr); |
ebcbdd1c4cc8
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changeset
|
1049 break; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1050 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1051 strip_nl(input_buf); |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
1052 //hitting enter repeats last command |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1053 if (input_buf[0]) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1054 strcpy(last_cmd, input_buf); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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1055 } else { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1056 strcpy(input_buf, last_cmd); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1057 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1058 char * param; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1059 char format[8]; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1060 uint32_t value; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1061 bp_def * new_bp; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1062 switch(input_buf[0]) |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1063 { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1064 case 'c': |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1065 puts("Continuing"); |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1066 debugging = 0; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1067 break; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
diff
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|
1068 case 'b': |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
1069 param = find_param(input_buf); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1070 if (!param) { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1071 fputs("b command requires a parameter\n", stderr); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1072 break; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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1073 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1074 value = strtol(param, NULL, 16); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1075 insert_breakpoint(context, value, (uint8_t *)debugger); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1076 new_bp = malloc(sizeof(bp_def)); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1077 new_bp->next = breakpoints; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1078 new_bp->address = value; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1079 new_bp->index = bp_index++; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1080 breakpoints = new_bp; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1081 printf("Breakpoint %d set at %X\n", new_bp->index, value); |
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Mike Pavone <pavone@retrodev.com>
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|
1082 break; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1083 case 'a': |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1084 param = find_param(input_buf); |
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Mike Pavone <pavone@retrodev.com>
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|
1085 if (!param) { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1086 fputs("a command requires a parameter\n", stderr); |
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1087 break; |
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Mike Pavone <pavone@retrodev.com>
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166
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1088 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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|
1089 value = strtol(param, NULL, 16); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1090 insert_breakpoint(context, value, (uint8_t *)debugger); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1091 debugging = 0; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1092 break; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
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|
1093 case 'd': |
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Mike Pavone <pavone@retrodev.com>
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166
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|
1094 param = find_param(input_buf); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1095 if (!param) { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1096 fputs("b command requires a parameter\n", stderr); |
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Mike Pavone <pavone@retrodev.com>
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166
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|
1097 break; |
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Mike Pavone <pavone@retrodev.com>
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166
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1098 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1099 value = atoi(param); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1100 this_bp = find_breakpoint_idx(&breakpoints, value); |
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Mike Pavone <pavone@retrodev.com>
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166
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|
1101 if (!*this_bp) { |
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Mike Pavone <pavone@retrodev.com>
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166
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|
1102 fprintf(stderr, "Breakpoint %d does not exist\n", value); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1103 break; |
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Mike Pavone <pavone@retrodev.com>
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166
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|
1104 } |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
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|
1105 new_bp = *this_bp; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
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|
1106 *this_bp = (*this_bp)->next; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1107 free(new_bp); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1108 break; |
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Mike Pavone <pavone@retrodev.com>
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|
1109 case 'p': |
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166
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|
1110 strcpy(format, "%s: %d\n"); |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1111 if (input_buf[1] == '/') { |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1112 switch (input_buf[2]) |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
1113 { |
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|
1114 case 'x': |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
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166
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|
1115 case 'X': |
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|
1116 case 'd': |
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Mike Pavone <pavone@retrodev.com>
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1117 case 'c': |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
1118 format[5] = input_buf[2]; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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1119 break; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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|
1120 default: |
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166
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|
1121 fprintf(stderr, "Unrecognized format character: %c\n", input_buf[2]); |
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1122 } |
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1123 } |
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|
1124 param = find_param(input_buf); |
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166
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|
1125 if (!param) { |
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166
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|
1126 fputs("p command requires a parameter\n", stderr); |
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|
1127 break; |
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|
1128 } |
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|
1129 if (param[0] == 'd' && param[1] >= '0' && param[1] <= '7') { |
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|
1130 value = context->dregs[param[1]-'0']; |
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|
1131 } else if (param[0] == 'a' && param[1] >= '0' && param[1] <= '7') { |
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|
1132 value = context->aregs[param[1]-'0']; |
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|
1133 } else if (param[0] == 'S' && param[1] == 'R') { |
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|
1134 value = (context->status << 8); |
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|
1135 for (int flag = 0; flag < 5; flag++) { |
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|
1136 value |= context->flags[flag] << (4-flag); |
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1137 } |
185
b204fbed4efe
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184
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|
1138 } else if(param[0] == 'c') { |
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Add ability to print out current 68K cycle in debugger
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184
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|
1139 value = context->current_cycle; |
184
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1140 } else if (param[0] == '0' && param[1] == 'x') { |
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|
1141 uint32_t p_addr = strtol(param+2, NULL, 16); |
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166
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|
1142 value = read_dma_value(p_addr/2); |
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1143 } else { |
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|
1144 fprintf(stderr, "Unrecognized parameter to p: %s\n", param); |
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1145 break; |
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|
1146 } |
ebcbdd1c4cc8
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|
1147 printf(format, param, value); |
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|
1148 break; |
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|
1149 case 'n': |
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|
1150 //TODO: Deal with jmp, dbcc, rtr and rte |
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|
1151 if (inst.op == M68K_RTS) { |
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166
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|
1152 after = (read_dma_value(context->aregs[7]/2) << 16) | read_dma_value(context->aregs[7]/2 + 1); |
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|
1153 } else if(inst.op == M68K_BCC && inst.extra.cond != COND_FALSE) { |
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changeset
|
1154 if (inst.extra.cond = COND_TRUE) { |
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|
1155 after = inst.address + 2 + inst.src.params.immed; |
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Fix a bunch of bugs in the CPU core, add a 68K debugger
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166
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|
1156 } else { |
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166
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changeset
|
1157 branch_f = after; |
ebcbdd1c4cc8
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166
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|
1158 branch_t = inst.address + 2 + inst.src.params.immed; |
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|
1159 insert_breakpoint(context, branch_t, (uint8_t *)debugger); |
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1160 } |
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1161 } |
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1162 insert_breakpoint(context, after, (uint8_t *)debugger); |
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1163 debugging = 0; |
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1164 break; |
327
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1165 case 'v': { |
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1166 genesis_context * gen = context->system; |
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1167 //VDP debug commands |
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1168 switch(input_buf[1]) |
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|
1169 { |
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|
1170 case 's': |
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1171 vdp_print_sprite_table(gen->vdp); |
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1172 break; |
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|
1173 case 'r': |
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1174 vdp_print_reg_explain(gen->vdp); |
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|
1175 break; |
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1176 } |
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|
1177 break; |
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1178 } |
184
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1179 case 'q': |
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1180 puts("Quitting"); |
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1181 exit(0); |
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1182 break; |
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1183 default: |
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1184 fprintf(stderr, "Unrecognized debugger command %s\n", input_buf); |
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1185 break; |
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1186 } |
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1187 } |
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1188 return context; |
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1189 } |
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1190 |
351
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1191 #define ROM_END 0x1A4 |
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1192 #define RAM_ID 0x1B0 |
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1193 #define RAM_FLAGS 0x1B2 |
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1194 #define RAM_START 0x1B4 |
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1195 #define RAM_END 0x1B8 |
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1196 #define MAX_MAP_CHUNKS (4+7+1) |
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1197 #define RAM_FLAG_MASK 0x1800 |
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1198 |
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1199 const memmap_chunk static_map[] = { |
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1200 {0, 0x400000, 0xFFFFFF, 0, MMAP_READ, cart, |
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1201 NULL, NULL, NULL, NULL}, |
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1202 {0xE00000, 0x1000000, 0xFFFF, 0, MMAP_READ | MMAP_WRITE | MMAP_CODE, ram, |
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1203 NULL, NULL, NULL, NULL}, |
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1204 {0xC00000, 0xE00000, 0x1FFFFF, 0, 0, NULL, |
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1205 (read_16_fun)vdp_port_read, (write_16_fun)vdp_port_write, |
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1206 (read_8_fun)vdp_port_read_b, (write_8_fun)vdp_port_write_b}, |
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1207 {0xA00000, 0xA12000, 0x1FFFF, 0, 0, NULL, |
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1208 (read_16_fun)io_read_w, (write_16_fun)io_write_w, |
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1209 (read_8_fun)io_read, (write_8_fun)io_write} |
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1210 }; |
351
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1211 |
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1212 char * sram_filename; |
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1213 genesis_context * genesis; |
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1214 void save_sram() |
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1215 { |
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1216 FILE * f = fopen(sram_filename, "wb"); |
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1217 if (!f) { |
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1218 fprintf(stderr, "Failed to open SRAM file %s for writing\n", sram_filename); |
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|
1219 return; |
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1220 } |
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|
1221 uint32_t size = genesis->save_ram_mask+1; |
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1222 if (genesis->save_flags != RAM_FLAG_BOTH) { |
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|
1223 size/= 2; |
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1224 } |
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346
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|
1225 fwrite(genesis->save_ram, 1, size, f); |
2f264d2a60c2
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|
1226 fclose(f); |
2f264d2a60c2
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|
1227 printf("Saved SRAM to %s\n", sram_filename); |
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|
1228 } |
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|
1229 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1230 void init_run_cpu(genesis_context * gen, int debug, FILE * address_log) |
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|
1231 { |
2f264d2a60c2
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346
diff
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|
1232 m68k_context context; |
2f264d2a60c2
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346
diff
changeset
|
1233 x86_68k_options opts; |
2f264d2a60c2
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diff
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|
1234 gen->m68k = &context; |
2f264d2a60c2
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|
1235 memmap_chunk memmap[MAX_MAP_CHUNKS]; |
2f264d2a60c2
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|
1236 uint32_t num_chunks; |
2f264d2a60c2
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|
1237 void * initial_mapped = NULL; |
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|
1238 gen->save_ram = NULL; |
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|
1239 //TODO: Handle carts larger than 4MB |
2f264d2a60c2
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|
1240 //TODO: Handle non-standard mappers |
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|
1241 uint32_t size; |
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|
1242 if ((cart[RAM_ID/2] & 0xFF) == 'A' && (cart[RAM_ID/2] >> 8) == 'R') { |
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|
1243 //Cart has save RAM |
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|
1244 uint32_t rom_end = ((cart[ROM_END/2] << 16) | cart[ROM_END/2+1]) + 1; |
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|
1245 uint32_t ram_start = (cart[RAM_START/2] << 16) | cart[RAM_START/2+1]; |
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|
1246 uint32_t ram_end = (cart[RAM_END/2] << 16) | cart[RAM_END/2+1]; |
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|
1247 uint16_t ram_flags = cart[RAM_FLAGS/2]; |
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|
1248 gen->save_flags = ram_flags & RAM_FLAG_MASK; |
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|
1249 memset(memmap, 0, sizeof(memmap_chunk)*2); |
2f264d2a60c2
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|
1250 if (ram_start >= rom_end) { |
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|
1251 memmap[0].end = rom_end; |
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|
1252 memmap[0].mask = 0xFFFFFF; |
2f264d2a60c2
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|
1253 memmap[0].flags = MMAP_READ; |
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|
1254 memmap[0].buffer = cart; |
2f264d2a60c2
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|
1255 |
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|
1256 ram_start &= 0xFFFFFE; |
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|
1257 ram_end |= 1; |
2f264d2a60c2
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|
1258 memmap[1].start = ram_start; |
2f264d2a60c2
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|
1259 gen->save_ram_mask = memmap[1].mask = ram_end-ram_start; |
2f264d2a60c2
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|
1260 ram_end += 1; |
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diff
changeset
|
1261 memmap[1].end = ram_end; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1262 memmap[1].flags = MMAP_READ | MMAP_WRITE; |
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Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1263 size = ram_end-ram_start; |
2f264d2a60c2
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|
1264 if ((ram_flags & RAM_FLAG_MASK) == RAM_FLAG_ODD) { |
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|
1265 memmap[1].flags |= MMAP_ONLY_ODD; |
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|
1266 size /= 2; |
2f264d2a60c2
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|
1267 } else if((ram_flags & RAM_FLAG_MASK) == RAM_FLAG_EVEN) { |
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|
1268 memmap[1].flags |= MMAP_ONLY_EVEN; |
2f264d2a60c2
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|
1269 size /= 2; |
2f264d2a60c2
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|
1270 } |
2f264d2a60c2
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|
1271 memmap[1].buffer = gen->save_ram = malloc(size); |
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1272 |
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|
1273 memcpy(memmap+2, static_map+1, sizeof(static_map)-sizeof(static_map[0])); |
2f264d2a60c2
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|
1274 num_chunks = sizeof(static_map)/sizeof(memmap_chunk)+1; |
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|
1275 } else { |
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|
1276 //Assume the standard Sega mapper for now |
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|
1277 memmap[0].end = 0x200000; |
2f264d2a60c2
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|
1278 memmap[0].mask = 0xFFFFFF; |
2f264d2a60c2
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|
1279 memmap[0].flags = MMAP_READ; |
2f264d2a60c2
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346
diff
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|
1280 memmap[0].buffer = cart; |
2f264d2a60c2
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|
1281 |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1282 memmap[1].start = 0x200000; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1283 memmap[1].end = 0x400000; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1284 memmap[1].mask = 0x1FFFFF; |
2f264d2a60c2
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|
1285 ram_start &= 0xFFFFFE; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1286 ram_end |= 1; |
2f264d2a60c2
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|
1287 gen->save_ram_mask = ram_end-ram_start; |
2f264d2a60c2
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|
1288 memmap[1].flags = MMAP_READ | MMAP_PTR_IDX | MMAP_FUNC_NULL; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1289 memmap[1].ptr_index = 2; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1290 memmap[1].read_16 = (read_16_fun)read_sram_w;//these will only be called when mem_pointers[2] == NULL |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1291 memmap[1].read_8 = (read_8_fun)read_sram_b; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1292 memmap[1].write_16 = (write_16_fun)write_sram_area_w;//these will be called all writes to the area |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1293 memmap[1].write_8 = (write_8_fun)write_sram_area_b; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1294 memcpy(memmap+2, static_map+1, sizeof(static_map)-sizeof(static_map[0])); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1295 num_chunks = sizeof(static_map)/sizeof(memmap_chunk)+1; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1296 memset(memmap+num_chunks, 0, sizeof(memmap[num_chunks])); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1297 memmap[num_chunks].start = 0xA13000; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1298 memmap[num_chunks].end = 0xA13100; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1299 memmap[num_chunks].mask = 0xFF; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1300 memmap[num_chunks].write_16 = (write_16_fun)write_bank_reg_w; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1301 memmap[num_chunks].write_8 = (write_8_fun)write_bank_reg_b; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1302 num_chunks++; |
2f264d2a60c2
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346
diff
changeset
|
1303 ram_end++; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1304 size = ram_end-ram_start; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
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|
1305 if ((ram_flags & RAM_FLAG_MASK) != RAM_FLAG_BOTH) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1306 size /= 2; |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1307 } |
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Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1308 gen->save_ram = malloc(size); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1309 memmap[1].buffer = initial_mapped = cart + 0x200000/2; |
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Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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diff
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|
1310 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1311 } else { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1312 memcpy(memmap, static_map, sizeof(static_map)); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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diff
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|
1313 num_chunks = sizeof(static_map)/sizeof(memmap_chunk); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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diff
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|
1314 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1315 if (gen->save_ram) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1316 memset(gen->save_ram, 0, size); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1317 FILE * f = fopen(sram_filename, "rb"); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1318 if (f) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1319 uint32_t read = fread(gen->save_ram, 1, size, f); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1320 fclose(f); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1321 if (read > 0) { |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
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|
1322 printf("Loaded SRAM from %s\n", sram_filename); |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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diff
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|
1323 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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|
1324 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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346
diff
changeset
|
1325 atexit(save_sram); |
2f264d2a60c2
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346
diff
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|
1326 } |
2f264d2a60c2
Support for SRAM with SEGA mapper. Half-finished support for SRAM without SEGA mapper.
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diff
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|
1327 init_x86_68k_opts(&opts, memmap, num_chunks); |
211 | 1328 opts.address_log = address_log; |
1329 init_68k_context(&context, opts.native_code_map, &opts); | |
1330 | |
288
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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280
diff
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|
1331 context.video_context = gen->vdp; |
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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diff
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|
1332 context.system = gen; |
211 | 1333 //cartridge ROM |
1334 context.mem_pointers[0] = cart; | |
342
13f994c88c34
Get frame time correct and frame rate sort of correct for EUR region
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341
diff
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|
1335 context.target_cycle = context.sync_cycle = mclks_per_frame/MCLKS_PER_68K; |
211 | 1336 //work RAM |
1337 context.mem_pointers[1] = ram; | |
351
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|
1338 //save RAM/map |
2f264d2a60c2
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|
1339 context.mem_pointers[2] = initial_mapped; |
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|
1340 context.mem_pointers[3] = (uint16_t *)gen->save_ram; |
211 | 1341 uint32_t address; |
1342 address = cart[2] << 16 | cart[3]; | |
1343 translate_m68k_stream(address, &context); | |
1344 if (debug) { | |
1345 insert_breakpoint(&context, address, (uint8_t *)debugger); | |
1346 } | |
1347 m68k_reset(&context); | |
1348 } | |
1349 | |
340
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|
1350 char title[64]; |
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|
1351 |
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|
1352 #define TITLE_START 0x150 |
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Set window title based on ROM header name
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|
1353 #define TITLE_END (TITLE_START+48) |
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|
1354 |
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|
1355 void update_title() |
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Set window title based on ROM header name
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|
1356 { |
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|
1357 uint16_t *last = cart + TITLE_END/2 - 1; |
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|
1358 while(last > cart + TITLE_START/2 && *last == 0x2020) |
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|
1359 { |
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|
1360 last--; |
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|
1361 } |
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|
1362 uint16_t *start = cart + TITLE_START/2; |
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|
1363 char *cur = title; |
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|
1364 char last_char = ' '; |
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|
1365 for (; start != last; start++) |
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|
1366 { |
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|
1367 if ((last_char != ' ' || (*start >> 8) != ' ') && (*start >> 8) < 0x80) { |
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|
1368 *(cur++) = *start >> 8; |
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|
1369 last_char = *start >> 8; |
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|
1370 } |
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|
1371 if (last_char != ' ' || (*start & 0xFF) != ' ' && (*start & 0xFF) < 0x80) { |
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|
1372 *(cur++) = *start; |
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|
1373 last_char = *start & 0xFF; |
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|
1374 } |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1375 } |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1376 *(cur++) = *start >> 8; |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1377 if ((*start & 0xFF) != ' ') { |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1378 *(cur++) = *start; |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1379 } |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1380 strcpy(cur, " - BlastEm"); |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1381 } |
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1382 |
341
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1383 #define REGION_START 0x1F0 |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1384 |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1385 int detect_specific_region(char region) |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1386 { |
346
aff29d50afd5
Fix a region detection bug
Mike Pavone <pavone@retrodev.com>
parents:
345
diff
changeset
|
1387 return (cart[REGION_START/2] & 0xFF) == region || (cart[REGION_START/2] >> 8) == region || (cart[REGION_START/2+1] & 0xFF) == region; |
341
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1388 } |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1389 |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1390 void detect_region() |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1391 { |
343
467bfa17004a
Mostly working runtime generation of memory map read/write functions
Mike Pavone <pavone@retrodev.com>
parents:
342
diff
changeset
|
1392 if (detect_specific_region('U')|| detect_specific_region('B') || detect_specific_region('4')) { |
341
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1393 version_reg = NO_DISK | USA; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1394 } else if (detect_specific_region('J')) { |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1395 version_reg = NO_DISK | JAP; |
343
467bfa17004a
Mostly working runtime generation of memory map read/write functions
Mike Pavone <pavone@retrodev.com>
parents:
342
diff
changeset
|
1396 } else if (detect_specific_region('E') || detect_specific_region('A')) { |
341
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1397 version_reg = NO_DISK | EUR; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1398 } |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1399 } |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1400 |
354
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1401 #define PSG_CLKS_NTSC (3579545/16) |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1402 #define PSG_CLKS_PAL (3546893/16) |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1403 |
88
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1404 int main(int argc, char ** argv) |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1405 { |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1406 if (argc < 2) { |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1407 fputs("Usage: blastem FILENAME\n", stderr); |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1408 return 1; |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1409 } |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1410 if(!load_rom(argv[1])) { |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1411 fprintf(stderr, "Failed to open %s for reading\n", argv[1]); |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1412 return 1; |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1413 } |
341
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1414 detect_region(); |
184
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1415 int width = -1; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1416 int height = -1; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1417 int debug = 0; |
197
7c227a8ec53d
Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents:
195
diff
changeset
|
1418 FILE *address_log = NULL; |
184
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1419 for (int i = 2; i < argc; i++) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1420 if (argv[i][0] == '-') { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1421 switch(argv[i][1]) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1422 case 'd': |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1423 debug = 1; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1424 break; |
338
5c34a9c39394
Re-enable frame limit, but add a command line flag to disable it
Mike Pavone <pavone@retrodev.com>
parents:
336
diff
changeset
|
1425 case 'f': |
356
79e4b466e7d0
Get rid of debug puts and limit based on audio rather than frame rate by default.
Mike Pavone <pavone@retrodev.com>
parents:
354
diff
changeset
|
1426 frame_limit = 1; |
338
5c34a9c39394
Re-enable frame limit, but add a command line flag to disable it
Mike Pavone <pavone@retrodev.com>
parents:
336
diff
changeset
|
1427 break; |
197
7c227a8ec53d
Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents:
195
diff
changeset
|
1428 case 'l': |
7c227a8ec53d
Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents:
195
diff
changeset
|
1429 address_log = fopen("address.log", "w"); |
7c227a8ec53d
Add instruction address logging to translator and support for reading an address log to the disassembler
Mike Pavone <pavone@retrodev.com>
parents:
195
diff
changeset
|
1430 break; |
215
2b1c2c28b261
Added headless flag to avoid initializing SDL and opening a window when running tests.
Mike Pavone <pavone@retrodev.com>
parents:
211
diff
changeset
|
1431 case 'v': |
2b1c2c28b261
Added headless flag to avoid initializing SDL and opening a window when running tests.
Mike Pavone <pavone@retrodev.com>
parents:
211
diff
changeset
|
1432 headless = 1; |
2b1c2c28b261
Added headless flag to avoid initializing SDL and opening a window when running tests.
Mike Pavone <pavone@retrodev.com>
parents:
211
diff
changeset
|
1433 break; |
265
c6d12878ea93
Add -n flag for disabling the Z80 core
Mike Pavone <pavone@retrodev.com>
parents:
264
diff
changeset
|
1434 case 'n': |
c6d12878ea93
Add -n flag for disabling the Z80 core
Mike Pavone <pavone@retrodev.com>
parents:
264
diff
changeset
|
1435 z80_enabled = 0; |
c6d12878ea93
Add -n flag for disabling the Z80 core
Mike Pavone <pavone@retrodev.com>
parents:
264
diff
changeset
|
1436 break; |
341
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1437 case 'r': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1438 i++; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1439 if (i >= argc) { |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1440 fputs("-r must be followed by region (J, U or E)\n", stderr); |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1441 return 1; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1442 } |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1443 switch (argv[i][0]) |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1444 { |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1445 case 'j': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1446 case 'J': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1447 version_reg = NO_DISK | JAP; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1448 break; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1449 case 'u': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1450 case 'U': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1451 version_reg = NO_DISK | USA; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1452 break; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1453 case 'e': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1454 case 'E': |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1455 version_reg = NO_DISK | EUR; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1456 break; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1457 default: |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1458 fprintf(stderr, "'%c' is not a valid region character for the -r option\n", argv[i][0]); |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1459 return 1; |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1460 } |
6ad8e36de685
Support regions other than USA
Mike Pavone <pavone@retrodev.com>
parents:
340
diff
changeset
|
1461 break; |
184
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1462 default: |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1463 fprintf(stderr, "Unrecognized switch %s\n", argv[i]); |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1464 return 1; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1465 } |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1466 } else if (width < 0) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1467 width = atoi(argv[i]); |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1468 } else if (height < 0) { |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1469 height = atoi(argv[i]); |
88
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1470 } |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1471 } |
340
58a085cfc6bd
Set window title based on ROM header name
Mike Pavone <pavone@retrodev.com>
parents:
338
diff
changeset
|
1472 update_title(); |
184
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1473 width = width < 320 ? 320 : width; |
ebcbdd1c4cc8
Fix a bunch of bugs in the CPU core, add a 68K debugger
Mike Pavone <pavone@retrodev.com>
parents:
166
diff
changeset
|
1474 height = height < 240 ? (width/320) * 240 : height; |
354
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1475 uint32_t fps = 60; |
342
13f994c88c34
Get frame time correct and frame rate sort of correct for EUR region
Mike Pavone <pavone@retrodev.com>
parents:
341
diff
changeset
|
1476 if (version_reg & 0x40) { |
13f994c88c34
Get frame time correct and frame rate sort of correct for EUR region
Mike Pavone <pavone@retrodev.com>
parents:
341
diff
changeset
|
1477 mclks_per_frame = MCLKS_LINE * LINES_PAL; |
354
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1478 fps = 50; |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1479 } |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1480 if (!headless) { |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1481 render_init(width, height, title, fps); |
342
13f994c88c34
Get frame time correct and frame rate sort of correct for EUR region
Mike Pavone <pavone@retrodev.com>
parents:
341
diff
changeset
|
1482 } |
88
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1483 vdp_context v_context; |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1484 |
c339559f1d4f
Forgot to add blastem main file earlier
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
1485 init_vdp_context(&v_context); |
260
625f8e4d5fd2
Initial stab at integartiong Z80 core
Mike Pavone <pavone@retrodev.com>
parents:
215
diff
changeset
|
1486 |
288
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
1487 ym2612_context y_context; |
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
1488 ym_init(&y_context); |
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
280
diff
changeset
|
1489 |
354
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1490 psg_context p_context; |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1491 psg_init(&p_context, render_sample_rate(), fps == 60 ? PSG_CLKS_NTSC : PSG_CLKS_PAL, render_audio_buffer()); |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
351
diff
changeset
|
1492 |
260
625f8e4d5fd2
Initial stab at integartiong Z80 core
Mike Pavone <pavone@retrodev.com>
parents:
215
diff
changeset
|
1493 z80_context z_context; |
625f8e4d5fd2
Initial stab at integartiong Z80 core
Mike Pavone <pavone@retrodev.com>
parents:
215
diff
changeset
|
1494 x86_z80_options z_opts; |
625f8e4d5fd2
Initial stab at integartiong Z80 core
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1495 init_x86_z80_opts(&z_opts); |
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1496 init_z80_context(&z_context, &z_opts); |
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1497 |
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1498 genesis_context gen; |
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1499 |
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1500 z_context.system = &gen; |
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1501 z_context.mem_pointers[0] = z80_ram; |
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1502 z_context.sync_cycle = z_context.target_cycle = mclks_per_frame/MCLKS_PER_Z80; |
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1503 z_context.int_cycle = CYCLE_NEVER; |
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1504 z_context.mem_pointers[1] = z_context.mem_pointers[2] = (uint8_t *)cart; |
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1505 |
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1506 gen.z80 = &z_context; |
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1507 gen.vdp = &v_context; |
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1508 gen.ym = &y_context; |
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1509 gen.psg = &p_context; |
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1510 genesis = &gen; |
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1511 |
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1512 int fname_size = strlen(argv[1]); |
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1513 sram_filename = malloc(fname_size+6); |
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1514 memcpy(sram_filename, argv[1], fname_size); |
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1515 int i; |
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1516 for (i = fname_size-1; fname_size >= 0; --i) { |
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1517 if (sram_filename[i] == '.') { |
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1518 strcpy(sram_filename + i + 1, "sram"); |
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1519 break; |
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1520 } |
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1521 } |
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1522 if (i < 0) { |
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1523 strcpy(sram_filename + fname_size, ".sram"); |
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1524 } |
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1525 |
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1526 init_run_cpu(&gen, debug, address_log); |
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1527 return 0; |
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1528 } |