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