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disptrace.c
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disptrace.c
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#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
enum
{
IMP,IMPA,IMM,ZP,ZPX,ZPY,INDX,INDY,IND,ABS,ABSX,ABSY,IND16,IND1X,BRA
};
static char dopname[256][6]=
{
/*00*/ "BRK","ORA","---","---","TSB","ORA","ASL","---","PHP","ORA","ASL","---","TSB","ORA","ASL","---",
/*10*/ "BPL","ORA","ORA","---","TRB","ORA","ASL","---","CLC","ORA","INC","---","TRB","ORA","ASL","---",
/*20*/ "JSR","AND","---","---","BIT","AND","ROL","---","PLP","AND","ROL","---","BIT","AND","ROL","---",
/*30*/ "BMI","AND","AND","---","BIT","AND","ROL","---","SEC","AND","DEC","---","BIT","AND","ROL","---",
/*40*/ "RTI","EOR","---","---","---","EOR","LSR","---","PHA","EOR","LSR","---","JMP","EOR","LSR","---",
/*50*/ "BVC","EOR","EOR","---","---","EOR","LSR","---","CLI","EOR","PHY","---","---","EOR","LSR","---",
/*60*/ "RTS","ADC","---","---","STZ","ADC","ROR","---","PLA","ADC","ROR","---","JMP","ADC","ROR","---",
/*70*/ "BVS","ADC","ADC","---","STZ","ADC","ROR","---","SEI","ADC","PLY","---","JMP","ADC","ROR","---",
/*80*/ "BRA","STA","---","---","STY","STA","STX","---","DEY","BIT","TXA","---","STY","STA","STX","---",
/*90*/ "BCC","STA","STA","---","STY","STA","STX","---","TYA","STA","TXS","---","STZ","STA","STZ","---",
/*A0*/ "LDY","LDA","LDX","---","LDY","LDA","LDX","---","TAY","LDA","TAX","---","LDY","LDA","LDX","---",
/*B0*/ "BCS","LDA","LDA","---","LDY","LDA","LDX","---","CLV","LDA","TSX","---","LDY","LDA","LDX","---",
/*C0*/ "CPY","CMP","---","---","CPY","CMP","DEC","---","INY","CMP","DEX","WAI","CPY","CMP","DEC","---",
/*D0*/ "BNE","CMP","CMP","---","---","CMP","DEC","---","CLD","CMP","PHX","STP","---","CMP","DEC","---",
/*E0*/ "CPX","SBC","---","---","CPX","SBC","INC","---","INX","SBC","NOP","---","CPX","SBC","INC","---",
/*F0*/ "BEQ","SBC","SBC","---","---","SBC","INC","---","SED","SBC","PLX","---","---","SBC","INC","---",
};
static int dopaddr[256]=
{
/*00*/ IMP, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, ABS, ABS, ABS, IMP,
/*10*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMPA, IMP, ABS, ABSX, ABSX, IMP,
/*20*/ ABS, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, ABS, ABS, ABS, IMP,
/*30*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPX, IMP, IMP, ABSY, IMPA, IMP, ABSX, ABSX, ABSX, IMP,
/*40*/ IMP, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, ABS, ABS, ABS, IMP,
/*50*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
/*60*/ IMP, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, IND16,ABS, ABS, IMP,
/*70*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, IND1X,ABSX, ABSX, IMP,
/*80*/ BRA, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
/*90*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPY, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
/*A0*/ IMM, INDX, IMM, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
/*B0*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPY, IMP, IMP, ABSY, IMP, IMP, ABSX, ABSX, ABSY, IMP,
/*C0*/ IMM, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
/*D0*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
/*E0*/ IMM, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
/*F0*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
};
static char dopnamenmos[256][6]=
{
/*00*/ "BRK","ORA","HLT","SLO","NOP","ORA","ASL","SLO","PHP","ORA","ASL","ANC","NOP","ORA","ASL","SLO",
/*10*/ "BPL","ORA","HLT","SLO","NOP","ORA","ASL","SLO","CLC","ORA","NOP","SLO","NOP","ORA","ASL","SLO",
/*20*/ "JSR","AND","HLT","RLA","NOP","AND","ROL","RLA","PLP","AND","ROL","ANC","BIT","AND","ROL","RLA",
/*30*/ "BMI","AND","HLT","RLA","NOP","AND","ROL","RLA","SEC","AND","NOP","RLA","NOP","AND","ROL","RLA",
/*40*/ "RTI","EOR","HLT","SRE","NOP","EOR","LSR","SRE","PHA","EOR","LSR","ASR","JMP","EOR","LSR","SRE",
/*50*/ "BVC","EOR","HLT","SRE","NOP","EOR","LSR","SRE","CLI","EOR","NOP","SRE","NOP","EOR","LSR","SRE",
/*60*/ "RTS","ADC","HLT","RRA","NOP","ADC","ROR","RRA","PLA","ADC","ROR","ARR","JMP","ADC","ROR","RRA",
/*70*/ "BVS","ADC","HLT","RRA","NOP","ADC","ROR","RRA","SEI","ADC","NOP","RRA","NOP","ADC","ROR","RRA",
/*80*/ "BRA","STA","NOP","SAX","STY","STA","STX","SAX","DEY","NOP","TXA","ANE","STY","STA","STX","SAX",
/*90*/ "BCC","STA","HLT","SHA","STY","STA","STX","SAX","TYA","STA","TXS","SHS","SHY","STA","SHX","SHA",
/*A0*/ "LDY","LDA","LDX","LAX","LDY","LDA","LDX","LAX","TAY","LDA","TAX","LXA","LDY","LDA","LDX","LAX",
/*B0*/ "BCS","LDA","HLT","LAX","LDY","LDA","LDX","LAX","CLV","LDA","TSX","LAS","LDY","LDA","LDX","LAX",
/*C0*/ "CPY","CMP","NOP","DCP","CPY","CMP","DEC","DCP","INY","CMP","DEX","SBX","CPY","CMP","DEC","DCP",
/*D0*/ "BNE","CMP","HLT","DCP","NOP","CMP","DEC","DCP","CLD","CMP","NOP","DCP","NOP","CMP","DEC","DCP",
/*E0*/ "CPX","SBC","NOP","ISB","CPX","SBC","INC","ISB","INX","SBC","NOP","SBC","CPX","SBC","INC","ISB",
/*F0*/ "BEQ","SBC","HLT","ISB","NOP","SBC","INC","ISB","SED","SBC","NOP","ISB","NOP","SBC","INC","ISB",
};
static int dopaddrnmos[256]=
{
/*00*/ IMP, INDX, IMP, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMPA, IMM, ABS, ABS, ABS, ABS,
/*10*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPX, ZPX, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
/*20*/ ABS, INDX, IMP, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMPA, IMM, ABS, ABS, ABS, ABS,
/*30*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPX, ZPX, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
/*40*/ IMP, INDX, IMP, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMPA, IMM, ABS, ABS, ABS, ABS,
/*50*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPX, ZPX, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
/*60*/ IMP, INDX, IMP, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMPA, IMM, IND16,ABS, ABS, ABS,
/*70*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPX, ZPX, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
/*80*/ BRA, INDX, IMM, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMP, IMM, ABS, ABS, ABS, ABS,
/*90*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPY, ZPY, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
/*A0*/ IMM, INDX, IMM, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMP, IMM, ABS, ABS, ABS, ABS,
/*B0*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPY, ZPY, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSY, ABSX,
/*C0*/ IMM, INDX, IMM, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMP, IMM, ABS, ABS, ABS, ABS,
/*D0*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPX, ZPX, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
/*E0*/ IMM, INDX, IMM, INDX, ZP, ZP, ZP, ZP, IMP, IMM, IMP, IMM, ABS, ABS, ABS, ABS,
/*F0*/ BRA, INDY, IMP, INDY, ZPX, ZPX, ZPX, ZPX, IMP, ABSY, IMP, ABSY, ABSX, ABSX, ABSX, ABSX,
};
static inline void disassemble(int cmos, uint16_t addr, uint8_t op, uint8_t p1, uint8_t p2, FILE *out) {
unsigned temp;
const char *opname = cmos ? dopname[op] : dopnamenmos[op];
fprintf(out, "%04X : %02X ", addr, op);
switch (cmos ? dopaddr[op] : dopaddrnmos[op])
{
case IMP:
fprintf(out, " %s ", opname);
break;
case IMPA:
fprintf(out, " %s A ", opname);
break;
case IMM:
fprintf(out, "%02X %s #%02X ", p1, opname, p1);
break;
case ZP:
fprintf(out, "%02X %s %02X ", p1, opname, p1);
break;
case ZPX:
fprintf(out, "%02X %s %02X,X ", p1, opname, p1);
break;
case ZPY:
fprintf(out, "%02X %s %02X,Y ", p1, opname, p1);
break;
case IND:
fprintf(out, "%02X %s (%02X) ", p1, opname, p1);
break;
case INDX:
fprintf(out, "%02X %s (%02X,X) ", p1, opname, p1);
break;
case INDY:
fprintf(out, "%02X %s (%02X),Y ", p1, opname, p1);
break;
case ABS:
fprintf(out, "%02X %02X %s %02X%02X ", p1, p2, opname, p2, p1);
break;
case ABSX:
fprintf(out, "%02X %02X %s %02X%02X,X ", p1, p2, opname, p2, p1);
break;
case ABSY:
fprintf(out, "%02X %02X %s %02X%02X,Y ", p1, p2, opname, p2, p1);
break;
case IND16:
fprintf(out, "%02X %02X %s (%02X%02X) ", p1, p2, opname, p2, p1);
break;
case IND1X:
fprintf(out, "%02X %02X %s (%02X%02X,X)", p1, p2, opname, p2, p1);
break;
case BRA:
temp = addr + 2 + (signed char)p1;
fprintf(out, "%02X %s %04X ", p1, opname, temp);
break;
}
}
static void display_trace(const char *filename, FILE *fp) {
char magic[4];
time_t secs;
int nmos, cmos, tickcount;
char tmstr[20];
uint16_t pc, ppc = 0;
uint8_t op, p1, p2, a, x, y, s, f;
nmos = cmos = 0;
if (fread(magic, 8, 1, fp) == 1) {
if (strncmp(magic, "6502NMOS", 8) == 0)
nmos = 1;
else if (strncmp(magic, "6502CMOS", 8) == 0)
cmos = 1;
}
if (nmos || cmos) {
if (fread(&secs, sizeof(secs), 1, fp) == 1) {
strftime(tmstr, sizeof tmstr, "%d/%m/%Y %H:%M:%S", localtime(&secs));
printf("6502 trace starts %s\n", tmstr);
while ((tickcount = getc_unlocked(fp)) != EOF) {
pc = getc_unlocked(fp);
pc |= getc_unlocked(fp) << 8;
pc--;
op = getc_unlocked(fp);
p1 = getc_unlocked(fp);
p2 = getc_unlocked(fp);
a = getc_unlocked(fp);
x = getc_unlocked(fp);
y = getc_unlocked(fp);
s = getc_unlocked(fp);
f = getc_unlocked(fp);
if (pc >= 0xf800 && ppc < 0xf800)
puts("call to OS ROM");
else if (pc < 0xf800) {
printf("%02d ", tickcount);
disassemble(cmos, pc, op, p1, p2, stdout);
printf(" %02X %02X %02X %02X ", a, x, y, s);
putc_unlocked((f & 0x80) ? 'N' : '.', stdout);
putc_unlocked((f & 0x40) ? 'V' : '.', stdout);
putc_unlocked((f & 0x08) ? 'D' : '.', stdout);
putc_unlocked((f & 0x04) ? 'I' : '.', stdout);
putc_unlocked((f & 0x02) ? 'Z' : '.', stdout);
putc_unlocked((f & 0x01) ? 'C' : '.', stdout);
putc_unlocked('\n', stdout);
}
ppc = pc;
}
} else
fprintf(stderr, "disptrace: unexpected end of file on %s\n", filename);
} else
fprintf(stderr, "disptrace: %s not a 6502 trace file\n", filename);
}
int main(int argc, char **argv) {
int status = 0;
const char *filename;
FILE *fp;
if (argc == 1)
display_trace("<stdin>", stdin);
else {
while (--argc) {
filename = *++argv;
if ((fp = fopen(filename, "rb"))) {
display_trace(filename, fp);
fclose(fp);
} else {
fprintf(stderr, "disptrace: unable to open %s: %m\n", filename);
status++;
}
}
}
return status;
}