| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | |
| 4 | #include "types.h" |
| 5 | #include "x6502.h" |
| 6 | #include "fce.h" |
| 7 | |
| 8 | // asm core state |
| 9 | extern uint32 nes_registers[0x10]; |
| 10 | extern uint32 pc_base; |
| 11 | extern uint8 nes_internal_ram[0x800]; |
| 12 | uint32 PC_prev = 0xcccccc, OP_prev = 0xcccccc; |
| 13 | int32 g_cnt = 0; |
| 14 | |
| 15 | static int pending_add_cycles = 0, pending_rebase = 0, pending_irq = 0; |
| 16 | |
| 17 | uint8 dreads[4]; |
| 18 | uint32 dwrites_c[2], dwrites_a[2]; |
| 19 | int dread_count_c, dread_count_a, dwrite_count_c, dwrite_count_a; |
| 20 | |
| 21 | static void leave(void) |
| 22 | { |
| 23 | printf("\nA: %02x, X: %02x, Y: %02x, S: %02x\n", X.A, X.X, X.Y, X.S); |
| 24 | printf("PC = %04lx, OP=%02lX\n", PC_prev, OP_prev); |
| 25 | exit(1); |
| 26 | } |
| 27 | |
| 28 | static void compare_state(void) |
| 29 | { |
| 30 | uint8 nes_flags; |
| 31 | int i, fail = 0; |
| 32 | |
| 33 | if ((nes_registers[0] >> 24) != X.A) { |
| 34 | printf("A: %02lx vs %02x\n", nes_registers[0] >> 24, X.A); |
| 35 | fail = 1; |
| 36 | } |
| 37 | |
| 38 | if ((nes_registers[1] & 0xff) != X.X) { |
| 39 | printf("X: %02lx vs %02x\n", nes_registers[1] & 0xff, X.X); |
| 40 | fail = 1; |
| 41 | } |
| 42 | |
| 43 | if ((nes_registers[2] & 0xff) != X.Y) { |
| 44 | printf("Y: %02lx vs %02x\n", nes_registers[2] & 0xff, X.Y); |
| 45 | fail = 1; |
| 46 | } |
| 47 | |
| 48 | if (nes_registers[3] - pc_base != X.PC) { |
| 49 | printf("PC: %04lx vs %04x\n", nes_registers[3] - pc_base, X.PC); |
| 50 | fail = 1; |
| 51 | } |
| 52 | |
| 53 | if ((nes_registers[4] >> 24) != X.S) { |
| 54 | printf("S: %02lx vs %02x\n", nes_registers[4] >> 24, X.S); |
| 55 | fail = 1; |
| 56 | } |
| 57 | |
| 58 | if (((nes_registers[4]>>8)&0xff) != X.IRQlow) { |
| 59 | printf("IRQlow: %02lx vs %02x\n", ((nes_registers[4]>>8)&0xff), X.IRQlow); |
| 60 | fail = 1; |
| 61 | } |
| 62 | |
| 63 | // NVUB DIZC |
| 64 | nes_flags = nes_registers[4] & 0x5d; |
| 65 | if ( nes_registers[5]&0x80000000) nes_flags |= 0x80; // N |
| 66 | if (!(nes_registers[5]&0x000000ff)) nes_flags |= 0x02; // Z |
| 67 | // nes_flags |= 0x20; // U, not set in C core (set only when pushing) |
| 68 | |
| 69 | if (nes_flags != (X.P&~0x20)) { |
| 70 | printf("flags: %02x vs %02x\n", nes_flags, (X.P&~0x20)); |
| 71 | fail = 1; |
| 72 | } |
| 73 | |
| 74 | if ((int32)nes_registers[7] != X.count) { |
| 75 | printf("cycles: %li vs %li\n", (int32)nes_registers[7], X.count); |
| 76 | fail = 1; |
| 77 | } |
| 78 | |
| 79 | if (dread_count_a != dread_count_c) { |
| 80 | printf("dread_count: %i vs %i\n", dread_count_a, dread_count_c); |
| 81 | fail = 1; |
| 82 | } |
| 83 | |
| 84 | if (dwrite_count_a != dwrite_count_c) { |
| 85 | printf("dwrite_count: %i vs %i\n", dwrite_count_a, dwrite_count_c); |
| 86 | fail = 1; |
| 87 | } |
| 88 | |
| 89 | for (i = dwrite_count_a - 1; !fail && i >= 0; i--) |
| 90 | if (dwrites_a[i] != dwrites_c[i]) { |
| 91 | printf("dwrites[%i]: %06lx vs %06lx\n", dwrite_count_a, dwrites_a[i], dwrites_c[i]); |
| 92 | fail = 1; |
| 93 | } |
| 94 | |
| 95 | if (fail) leave(); |
| 96 | } |
| 97 | |
| 98 | #if 1 |
| 99 | static void compare_ram(void) |
| 100 | { |
| 101 | int i, fail = 0; |
| 102 | for (i = 0; i < 0x800/4; i++) |
| 103 | { |
| 104 | if (((int *)nes_internal_ram)[i] != ((int32 *)RAM)[i]) { |
| 105 | int u; |
| 106 | fail = 1; |
| 107 | for (u = i*4; u < i*4+4; u++) |
| 108 | if (nes_internal_ram[u] != RAM[u]) |
| 109 | printf("RAM[%03x]: %02x vs %02x\n", u, nes_internal_ram[u], RAM[u]); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | if (fail) leave(); |
| 114 | } |
| 115 | #endif |
| 116 | |
| 117 | void TriggerIRQ_d(void) |
| 118 | { |
| 119 | printf("-- irq\n"); |
| 120 | pending_irq |= 0x100; |
| 121 | } |
| 122 | |
| 123 | void TriggerNMI_d(void) |
| 124 | { |
| 125 | printf("-- nmi\n"); |
| 126 | TriggerNMI_c(); |
| 127 | TriggerNMI_a(); |
| 128 | compare_state(); |
| 129 | } |
| 130 | |
| 131 | void TriggerNMINSF_d(void) |
| 132 | { |
| 133 | } |
| 134 | |
| 135 | void X6502_Run_d(int32 c) |
| 136 | { |
| 137 | int32 cycles = c << 4; /* *16 */ |
| 138 | if (PAL) cycles -= c; /* *15 */ |
| 139 | |
| 140 | //printf("-- %06i: run(%i)\n", (int)g_cnt, (int)c); |
| 141 | g_cnt += cycles; |
| 142 | |
| 143 | if (c > 200) |
| 144 | compare_ram(); |
| 145 | |
| 146 | while (g_cnt > 0) |
| 147 | { |
| 148 | if (pending_irq) { |
| 149 | if (pending_irq & 0x100) { |
| 150 | TriggerIRQ_c(); |
| 151 | TriggerIRQ_a(); |
| 152 | } |
| 153 | if (pending_irq & 0xff) { |
| 154 | TriggerIRQ_c(); |
| 155 | TriggerIRQ_a(); |
| 156 | X6502_IRQBegin_c(pending_irq & 0xff); |
| 157 | X6502_IRQBegin_a(pending_irq & 0xff); |
| 158 | } |
| 159 | pending_irq = 0; |
| 160 | } |
| 161 | |
| 162 | nes_registers[7]=1; |
| 163 | X.count=1; |
| 164 | |
| 165 | dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0; |
| 166 | X6502_Run_c(); |
| 167 | |
| 168 | X6502_Run_a(); |
| 169 | |
| 170 | compare_state(); |
| 171 | g_cnt -= 1 - X.count; |
| 172 | if (pending_add_cycles) { |
| 173 | g_cnt -= pending_add_cycles*48; |
| 174 | pending_add_cycles = 0; |
| 175 | } |
| 176 | if (pending_rebase) { |
| 177 | X6502_Rebase_a(); |
| 178 | pending_rebase = 0; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | //printf("-- run_end\n"); |
| 183 | } |
| 184 | |
| 185 | void X6502_Reset_d(void) |
| 186 | { |
| 187 | printf("-- reset\n"); |
| 188 | |
| 189 | X6502_Reset_c(); |
| 190 | X6502_Reset_a(); |
| 191 | compare_state(); |
| 192 | } |
| 193 | |
| 194 | void X6502_Power_d(void) |
| 195 | { |
| 196 | printf("-- power\n"); |
| 197 | if (nes_internal_ram == RAM) printf("nes_internal_ram == RAM!!\n"); |
| 198 | dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0; |
| 199 | |
| 200 | X6502_Power_c(); |
| 201 | X6502_Power_a(); |
| 202 | compare_state(); |
| 203 | } |
| 204 | |
| 205 | void X6502_AddCycles_d(int x) |
| 206 | { |
| 207 | printf("-- AddCycles(%i|%i)\n", x, x*48); |
| 208 | |
| 209 | pending_add_cycles = x; // *48; |
| 210 | // printf("can't use this in debug\n"); |
| 211 | // exit(1); |
| 212 | //X6502_AddCycles_c(x); |
| 213 | //X6502_AddCycles_a(x); |
| 214 | //compare_state(); |
| 215 | } |
| 216 | |
| 217 | void X6502_IRQBegin_d(int w) |
| 218 | { |
| 219 | printf("-- IRQBegin(%02x)\n", w); |
| 220 | |
| 221 | // X6502_IRQBegin_c(w); |
| 222 | // X6502_IRQBegin_a(w); |
| 223 | pending_irq |= w; |
| 224 | } |
| 225 | |
| 226 | void X6502_IRQEnd_d(int w) |
| 227 | { |
| 228 | printf("-- IRQEnd(%02x)\n", w); |
| 229 | |
| 230 | X6502_IRQEnd_c(w); |
| 231 | X6502_IRQEnd_a(w); |
| 232 | } |
| 233 | |
| 234 | |
| 235 | void X6502_Rebase_d(void) |
| 236 | { |
| 237 | pending_rebase = 1; |
| 238 | } |
| 239 | |
| 240 | |