ncpu_debug.c

   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