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 uint32 PC_prev = 0, g_cnt = 0;
  12
  13 int cpu_repeat;
  14 int cpu_lastval;
  15
  16 static void leave(void)
  17 {
  18         printf("\nA: %02x, X: %02x, Y: %02x, S: %02x\n", X.A, X.X, X.Y, X.S);
  19         printf("PC = %04lx, OP=%02X\n", PC_prev, (PC_prev < 0x2000) ? RAM[PC_prev&0x7ff] : ARead[PC_prev](PC_prev));
  20         exit(1);
  21 }
  22
  23 static void compare_state(void)
  24 {
  25         uint8 nes_flags;
  26         int fail = 0;
  27
  28         if ((nes_registers[0] >> 24) != X.A) {
  29                 printf("A: %02lx vs %02x\n", nes_registers[0] >> 24, X.A);
  30                 fail = 1;
  31         }
  32
  33         if ((nes_registers[1] & 0xff) != X.X) {
  34                 printf("X: %02lx vs %02x\n", nes_registers[1] & 0xff, X.X);
  35                 fail = 1;
  36         }
  37
  38         if ((nes_registers[2] & 0xff) != X.Y) {
  39                 printf("Y: %02lx vs %02x\n", nes_registers[2] & 0xff, X.Y);
  40                 fail = 1;
  41         }
  42
  43         if (nes_registers[3] - pc_base != X.PC) {
  44                 printf("PC: %04lx vs %04x\n", nes_registers[3] - pc_base, X.PC);
  45                 fail = 1;
  46         }
  47
  48         if ((nes_registers[4] >> 24) != X.S) {
  49                 printf("S: %02lx vs %02x\n", nes_registers[4] >> 24, X.S);
  50                 fail = 1;
  51         }
  52
  53         if (((nes_registers[4]>>8)&0xff) != X.IRQlow) {
  54                 printf("IRQlow: %02lx vs %02x\n", ((nes_registers[4]>>8)&0xff), X.IRQlow);
  55                 fail = 1;
  56         }
  57
  58         // NVUB DIZC
  59         nes_flags = nes_registers[4] & 0x5d;
  60         if (  nes_registers[5]&0x80000000)  nes_flags |= 0x80; // N
  61         if (!(nes_registers[5]&0x000000ff)) nes_flags |= 0x02; // Z
  62         // nes_flags |= 0x20; // U, not set in C core (set only when pushing)
  63
  64         if (nes_flags != (X.P&~0x20)) {
  65                 printf("flags: %02x vs %02x\n", nes_flags, (X.P&~0x20));
  66                 fail = 1;
  67         }
  68
  69         if ((int32)nes_registers[7] != X.count) {
  70                 printf("cycles: %li vs %li\n", (int32)nes_registers[7], X.count);
  71                 fail = 1;
  72         }
  73
  74         if (fail) leave();
  75 }
  76
  77
  78 void TriggerIRQ_d(void)
  79 {
  80         printf("-- irq\n");
  81         TriggerIRQ_c();
  82         TriggerIRQ_a();
  83         compare_state();
  84 }
  85
  86 void TriggerNMI_d(void)
  87 {
  88         printf("-- nmi\n");
  89         TriggerNMI_c();
  90         TriggerNMI_a();
  91         compare_state();
  92 }
  93
  94 void TriggerNMINSF_d(void)
  95 {
  96 }
  97
  98 void X6502_Run_d(int32 c)
  99 {
 100         int32 cycles = c << 4; /* *16 */ \
 101         if (PAL) cycles -= c;  /* *15 */ \
 102
 103         //printf("-- %06i: run(%i)\n", (int)g_cnt, (int)c);
 104         g_cnt += c;
 105
 106         while (cycles > 0)
 107         {
 108                 PC_prev = X.PC;
 109                 nes_registers[7]=1;
 110                 X.count=1;
 111
 112                 cpu_repeat = 0;
 113                 X6502_Run_c();
 114
 115                 cpu_repeat = 1;
 116                 X6502_Run_a();
 117
 118                 compare_state();
 119                 cycles -= 1 - X.count;
 120         }
 121
 122         //printf("-- run_end\n");
 123 }
 124
 125 void X6502_Reset_d(void)
 126 {
 127         printf("-- reset\n");
 128
 129         X6502_Reset_c();
 130         X6502_Reset_a();
 131         compare_state();
 132 }
 133
 134 void X6502_Power_d(void)
 135 {
 136         printf("-- power\n");
 137
 138         X6502_Power_c();
 139         X6502_Power_a();
 140         compare_state();
 141 }
 142
 143 void X6502_AddCycles_d(int x)
 144 {
 145         printf("-- AddCycles(%i|%i)\n", x, x*48);
 146
 147         printf("can't use this in debug\n");
 148         exit(1);
 149         //X6502_AddCycles_c(x);
 150         //X6502_AddCycles_a(x);
 151         //compare_state();
 152 }
 153
 154 void X6502_IRQBegin_d(int w)
 155 {
 156         printf("-- IRQBegin(%02x)\n", w);
 157
 158         X6502_IRQBegin_c(w);
 159         X6502_IRQBegin_a(w);
 160 }
 161
 162 void X6502_IRQEnd_d(int w)
 163 {
 164         printf("-- IRQEnd(%02x)\n", w);
 165
 166         X6502_IRQEnd_c(w);
 167         X6502_IRQEnd_a(w);
 168 }
 169
 170
 171