mirror of https://github.com/bsnes-emu/bsnes.git
484 lines
28 KiB
C++
484 lines
28 KiB
C++
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#ifdef CPUCORE_CPP
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uint8 CPUcore::dreadb(uint32 addr) {
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if((addr & 0x40ffff) >= 0x2000 && (addr & 0x40ffff) <= 0x5fff) {
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//$[00-3f|80-bf]:[2000-5fff]
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//do not read MMIO registers within debugger
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return 0x00;
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}
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return bus.read(addr);
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}
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uint16 CPUcore::dreadw(uint32 addr) {
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uint16 r;
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r = dreadb((addr + 0) & 0xffffff) << 0;
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r |= dreadb((addr + 1) & 0xffffff) << 8;
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return r;
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}
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uint32 CPUcore::dreadl(uint32 addr) {
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uint32 r;
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r = dreadb((addr + 0) & 0xffffff) << 0;
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r |= dreadb((addr + 1) & 0xffffff) << 8;
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r |= dreadb((addr + 2) & 0xffffff) << 16;
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return r;
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}
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uint32 CPUcore::decode(uint8 offset_type, uint32 addr) {
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uint32 r = 0;
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switch(offset_type) {
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case OPTYPE_DP:
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r = (regs.d + (addr & 0xffff)) & 0xffff;
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break;
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case OPTYPE_DPX:
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r = (regs.d + regs.x + (addr & 0xffff)) & 0xffff;
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break;
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case OPTYPE_DPY:
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r = (regs.d + regs.y + (addr & 0xffff)) & 0xffff;
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break;
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case OPTYPE_IDP:
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addr = (regs.d + (addr & 0xffff)) & 0xffff;
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r = (regs.db << 16) + dreadw(addr);
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break;
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case OPTYPE_IDPX:
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addr = (regs.d + regs.x + (addr & 0xffff)) & 0xffff;
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r = (regs.db << 16) + dreadw(addr);
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break;
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case OPTYPE_IDPY:
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addr = (regs.d + (addr & 0xffff)) & 0xffff;
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r = (regs.db << 16) + dreadw(addr) + regs.y;
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break;
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case OPTYPE_ILDP:
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addr = (regs.d + (addr & 0xffff)) & 0xffff;
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r = dreadl(addr);
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break;
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case OPTYPE_ILDPY:
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addr = (regs.d + (addr & 0xffff)) & 0xffff;
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r = dreadl(addr) + regs.y;
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break;
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case OPTYPE_ADDR:
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r = (regs.db << 16) + (addr & 0xffff);
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break;
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case OPTYPE_ADDR_PC:
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r = (regs.pc.b << 16) + (addr & 0xffff);
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break;
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case OPTYPE_ADDRX:
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r = (regs.db << 16) + (addr & 0xffff) + regs.x;
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break;
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case OPTYPE_ADDRY:
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r = (regs.db << 16) + (addr & 0xffff) + regs.y;
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break;
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case OPTYPE_IADDR_PC:
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r = (regs.pc.b << 16) + (addr & 0xffff);
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break;
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case OPTYPE_IADDRX:
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r = (regs.pc.b << 16) + ((addr + regs.x) & 0xffff);
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break;
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case OPTYPE_ILADDR:
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r = addr;
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break;
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case OPTYPE_LONG:
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r = addr;
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break;
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case OPTYPE_LONGX:
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r = (addr + regs.x);
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break;
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case OPTYPE_SR:
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r = (regs.s + (addr & 0xff)) & 0xffff;
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break;
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case OPTYPE_ISRY:
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addr = (regs.s + (addr & 0xff)) & 0xffff;
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r = (regs.db << 16) + dreadw(addr) + regs.y;
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break;
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case OPTYPE_RELB:
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r = (regs.pc.b << 16) + ((regs.pc.w + 2) & 0xffff);
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r += int8(addr);
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break;
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case OPTYPE_RELW:
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r = (regs.pc.b << 16) + ((regs.pc.w + 3) & 0xffff);
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r += int16(addr);
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break;
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}
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return(r & 0xffffff);
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}
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void CPUcore::disassemble_opcode(char *output, uint32 addr) {
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static reg24_t pc;
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char t[256];
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char *s = output;
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if(false /* in_opcode() == true */) {
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strcpy(s, "?????? <CPU within opcode>");
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return;
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}
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pc.d = addr;
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sprintf(s, "%.6x ", (uint32)pc.d);
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uint8 op = dreadb(pc.d); pc.w++;
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uint8 op0 = dreadb(pc.d); pc.w++;
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uint8 op1 = dreadb(pc.d); pc.w++;
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uint8 op2 = dreadb(pc.d);
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#define op8 ((op0))
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#define op16 ((op0) | (op1 << 8))
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#define op24 ((op0) | (op1 << 8) | (op2 << 16))
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#define a8 (regs.e || regs.p.m)
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#define x8 (regs.e || regs.p.x)
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switch(op) {
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case 0x00: sprintf(t, "brk #$%.2x ", op8); break;
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case 0x01: sprintf(t, "ora ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
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case 0x02: sprintf(t, "cop #$%.2x ", op8); break;
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case 0x03: sprintf(t, "ora $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
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case 0x04: sprintf(t, "tsb $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x05: sprintf(t, "ora $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x06: sprintf(t, "asl $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x07: sprintf(t, "ora [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
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case 0x08: sprintf(t, "php "); break;
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case 0x09: if(a8)sprintf(t, "ora #$%.2x ", op8);
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else sprintf(t, "ora #$%.4x ", op16); break;
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case 0x0a: sprintf(t, "asl a "); break;
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case 0x0b: sprintf(t, "phd "); break;
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case 0x0c: sprintf(t, "tsb $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x0d: sprintf(t, "ora $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x0e: sprintf(t, "asl $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x0f: sprintf(t, "ora $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
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case 0x10: sprintf(t, "bpl $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
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case 0x11: sprintf(t, "ora ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
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case 0x12: sprintf(t, "ora ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
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case 0x13: sprintf(t, "ora ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
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case 0x14: sprintf(t, "trb $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x15: sprintf(t, "ora $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x16: sprintf(t, "asl $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x17: sprintf(t, "ora [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
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case 0x18: sprintf(t, "clc "); break;
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case 0x19: sprintf(t, "ora $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
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case 0x1a: sprintf(t, "inc "); break;
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case 0x1b: sprintf(t, "tcs "); break;
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case 0x1c: sprintf(t, "trb $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x1d: sprintf(t, "ora $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x1e: sprintf(t, "asl $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x1f: sprintf(t, "ora $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
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case 0x20: sprintf(t, "jsr $%.4x [%.6x]", op16, decode(OPTYPE_ADDR_PC, op16)); break;
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case 0x21: sprintf(t, "and ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
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case 0x22: sprintf(t, "jsl $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
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case 0x23: sprintf(t, "and $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
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case 0x24: sprintf(t, "bit $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x25: sprintf(t, "and $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x26: sprintf(t, "rol $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x27: sprintf(t, "and [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
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case 0x28: sprintf(t, "plp "); break;
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case 0x29: if(a8)sprintf(t, "and #$%.2x ", op8);
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else sprintf(t, "and #$%.4x ", op16); break;
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case 0x2a: sprintf(t, "rol a "); break;
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case 0x2b: sprintf(t, "pld "); break;
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case 0x2c: sprintf(t, "bit $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x2d: sprintf(t, "and $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x2e: sprintf(t, "rol $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x2f: sprintf(t, "and $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
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case 0x30: sprintf(t, "bmi $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
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case 0x31: sprintf(t, "and ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
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case 0x32: sprintf(t, "and ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
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case 0x33: sprintf(t, "and ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
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case 0x34: sprintf(t, "bit $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x35: sprintf(t, "and $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x36: sprintf(t, "rol $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x37: sprintf(t, "and [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
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case 0x38: sprintf(t, "sec "); break;
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case 0x39: sprintf(t, "and $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
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case 0x3a: sprintf(t, "dec "); break;
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case 0x3b: sprintf(t, "tsc "); break;
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case 0x3c: sprintf(t, "bit $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x3d: sprintf(t, "and $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x3e: sprintf(t, "rol $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x3f: sprintf(t, "and $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
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case 0x40: sprintf(t, "rti "); break;
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case 0x41: sprintf(t, "eor ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
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case 0x42: sprintf(t, "wdm "); break;
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case 0x43: sprintf(t, "eor $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
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case 0x44: sprintf(t, "mvp $%.2x,$%.2x ", op1, op8); break;
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case 0x45: sprintf(t, "eor $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x46: sprintf(t, "lsr $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x47: sprintf(t, "eor [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
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case 0x48: sprintf(t, "pha "); break;
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case 0x49: if(a8)sprintf(t, "eor #$%.2x ", op8);
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else sprintf(t, "eor #$%.4x ", op16); break;
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case 0x4a: sprintf(t, "lsr a "); break;
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case 0x4b: sprintf(t, "phk "); break;
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case 0x4c: sprintf(t, "jmp $%.4x [%.6x]", op16, decode(OPTYPE_ADDR_PC, op16)); break;
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case 0x4d: sprintf(t, "eor $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x4e: sprintf(t, "lsr $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x4f: sprintf(t, "eor $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
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case 0x50: sprintf(t, "bvc $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
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case 0x51: sprintf(t, "eor ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
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case 0x52: sprintf(t, "eor ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
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case 0x53: sprintf(t, "eor ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
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case 0x54: sprintf(t, "mvn $%.2x,$%.2x ", op1, op8); break;
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case 0x55: sprintf(t, "eor $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x56: sprintf(t, "lsr $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
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case 0x57: sprintf(t, "eor [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
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case 0x58: sprintf(t, "cli "); break;
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case 0x59: sprintf(t, "eor $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
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case 0x5a: sprintf(t, "phy "); break;
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case 0x5b: sprintf(t, "tcd "); break;
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case 0x5c: sprintf(t, "jml $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
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case 0x5d: sprintf(t, "eor $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x5e: sprintf(t, "lsr $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
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case 0x5f: sprintf(t, "eor $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
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case 0x60: sprintf(t, "rts "); break;
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case 0x61: sprintf(t, "adc ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
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case 0x62: sprintf(t, "per $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
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case 0x63: sprintf(t, "adc $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
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case 0x64: sprintf(t, "stz $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x65: sprintf(t, "adc $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x66: sprintf(t, "ror $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
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case 0x67: sprintf(t, "adc [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
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case 0x68: sprintf(t, "pla "); break;
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case 0x69: if(a8)sprintf(t, "adc #$%.2x ", op8);
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else sprintf(t, "adc #$%.4x ", op16); break;
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case 0x6a: sprintf(t, "ror a "); break;
|
||
|
|
case 0x6b: sprintf(t, "rtl "); break;
|
||
|
|
case 0x6c: sprintf(t, "jmp ($%.4x) [%.6x]", op16, decode(OPTYPE_IADDR_PC, op16)); break;
|
||
|
|
case 0x6d: sprintf(t, "adc $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0x6e: sprintf(t, "ror $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0x6f: sprintf(t, "adc $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
|
||
|
|
case 0x70: sprintf(t, "bvs $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
|
||
|
|
case 0x71: sprintf(t, "adc ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
|
||
|
|
case 0x72: sprintf(t, "adc ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
|
||
|
|
case 0x73: sprintf(t, "adc ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
|
||
|
|
case 0x74: sprintf(t, "stz $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0x75: sprintf(t, "adc $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0x76: sprintf(t, "ror $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0x77: sprintf(t, "adc [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
|
||
|
|
case 0x78: sprintf(t, "sei "); break;
|
||
|
|
case 0x79: sprintf(t, "adc $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
|
||
|
|
case 0x7a: sprintf(t, "ply "); break;
|
||
|
|
case 0x7b: sprintf(t, "tdc "); break;
|
||
|
|
case 0x7c: sprintf(t, "jmp ($%.4x,x) [%.6x]", op16, decode(OPTYPE_IADDRX, op16)); break;
|
||
|
|
case 0x7d: sprintf(t, "adc $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0x7e: sprintf(t, "ror $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0x7f: sprintf(t, "adc $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
|
||
|
|
case 0x80: sprintf(t, "bra $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
|
||
|
|
case 0x81: sprintf(t, "sta ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
|
||
|
|
case 0x82: sprintf(t, "brl $%.4x [%.6x]", uint16(decode(OPTYPE_RELW, op16)), decode(OPTYPE_RELW, op16)); break;
|
||
|
|
case 0x83: sprintf(t, "sta $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
|
||
|
|
case 0x84: sprintf(t, "sty $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0x85: sprintf(t, "sta $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0x86: sprintf(t, "stx $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0x87: sprintf(t, "sta [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
|
||
|
|
case 0x88: sprintf(t, "dey "); break;
|
||
|
|
case 0x89: if(a8)sprintf(t, "bit #$%.2x ", op8);
|
||
|
|
else sprintf(t, "bit #$%.4x ", op16); break;
|
||
|
|
case 0x8a: sprintf(t, "txa "); break;
|
||
|
|
case 0x8b: sprintf(t, "phb "); break;
|
||
|
|
case 0x8c: sprintf(t, "sty $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0x8d: sprintf(t, "sta $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0x8e: sprintf(t, "stx $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0x8f: sprintf(t, "sta $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
|
||
|
|
case 0x90: sprintf(t, "bcc $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
|
||
|
|
case 0x91: sprintf(t, "sta ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
|
||
|
|
case 0x92: sprintf(t, "sta ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
|
||
|
|
case 0x93: sprintf(t, "sta ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
|
||
|
|
case 0x94: sprintf(t, "sty $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0x95: sprintf(t, "sta $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0x96: sprintf(t, "stx $%.2x,y [%.6x]", op8, decode(OPTYPE_DPY, op8)); break;
|
||
|
|
case 0x97: sprintf(t, "sta [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
|
||
|
|
case 0x98: sprintf(t, "tya "); break;
|
||
|
|
case 0x99: sprintf(t, "sta $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
|
||
|
|
case 0x9a: sprintf(t, "txs "); break;
|
||
|
|
case 0x9b: sprintf(t, "txy "); break;
|
||
|
|
case 0x9c: sprintf(t, "stz $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0x9d: sprintf(t, "sta $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0x9e: sprintf(t, "stz $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0x9f: sprintf(t, "sta $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
|
||
|
|
case 0xa0: if(x8)sprintf(t, "ldy #$%.2x ", op8);
|
||
|
|
else sprintf(t, "ldy #$%.4x ", op16); break;
|
||
|
|
case 0xa1: sprintf(t, "lda ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
|
||
|
|
case 0xa2: if(x8)sprintf(t, "ldx #$%.2x ", op8);
|
||
|
|
else sprintf(t, "ldx #$%.4x ", op16); break;
|
||
|
|
case 0xa3: sprintf(t, "lda $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
|
||
|
|
case 0xa4: sprintf(t, "ldy $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xa5: sprintf(t, "lda $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xa6: sprintf(t, "ldx $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xa7: sprintf(t, "lda [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
|
||
|
|
case 0xa8: sprintf(t, "tay "); break;
|
||
|
|
case 0xa9: if(a8)sprintf(t, "lda #$%.2x ", op8);
|
||
|
|
else sprintf(t, "lda #$%.4x ", op16); break;
|
||
|
|
case 0xaa: sprintf(t, "tax "); break;
|
||
|
|
case 0xab: sprintf(t, "plb "); break;
|
||
|
|
case 0xac: sprintf(t, "ldy $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xad: sprintf(t, "lda $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xae: sprintf(t, "ldx $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xaf: sprintf(t, "lda $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
|
||
|
|
case 0xb0: sprintf(t, "bcs $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
|
||
|
|
case 0xb1: sprintf(t, "lda ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
|
||
|
|
case 0xb2: sprintf(t, "lda ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
|
||
|
|
case 0xb3: sprintf(t, "lda ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
|
||
|
|
case 0xb4: sprintf(t, "ldy $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0xb5: sprintf(t, "lda $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0xb6: sprintf(t, "ldx $%.2x,y [%.6x]", op8, decode(OPTYPE_DPY, op8)); break;
|
||
|
|
case 0xb7: sprintf(t, "lda [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
|
||
|
|
case 0xb8: sprintf(t, "clv "); break;
|
||
|
|
case 0xb9: sprintf(t, "lda $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
|
||
|
|
case 0xba: sprintf(t, "tsx "); break;
|
||
|
|
case 0xbb: sprintf(t, "tyx "); break;
|
||
|
|
case 0xbc: sprintf(t, "ldy $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0xbd: sprintf(t, "lda $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0xbe: sprintf(t, "ldx $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
|
||
|
|
case 0xbf: sprintf(t, "lda $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
|
||
|
|
case 0xc0: if(x8)sprintf(t, "cpy #$%.2x ", op8);
|
||
|
|
else sprintf(t, "cpy #$%.4x ", op16); break;
|
||
|
|
case 0xc1: sprintf(t, "cmp ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
|
||
|
|
case 0xc2: sprintf(t, "rep #$%.2x ", op8); break;
|
||
|
|
case 0xc3: sprintf(t, "cmp $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
|
||
|
|
case 0xc4: sprintf(t, "cpy $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xc5: sprintf(t, "cmp $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xc6: sprintf(t, "dec $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xc7: sprintf(t, "cmp [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
|
||
|
|
case 0xc8: sprintf(t, "iny "); break;
|
||
|
|
case 0xc9: if(a8)sprintf(t, "cmp #$%.2x ", op8);
|
||
|
|
else sprintf(t, "cmp #$%.4x ", op16); break;
|
||
|
|
case 0xca: sprintf(t, "dex "); break;
|
||
|
|
case 0xcb: sprintf(t, "wai "); break;
|
||
|
|
case 0xcc: sprintf(t, "cpy $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xcd: sprintf(t, "cmp $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xce: sprintf(t, "dec $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xcf: sprintf(t, "cmp $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
|
||
|
|
case 0xd0: sprintf(t, "bne $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
|
||
|
|
case 0xd1: sprintf(t, "cmp ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
|
||
|
|
case 0xd2: sprintf(t, "cmp ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
|
||
|
|
case 0xd3: sprintf(t, "cmp ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
|
||
|
|
case 0xd4: sprintf(t, "pei ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
|
||
|
|
case 0xd5: sprintf(t, "cmp $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0xd6: sprintf(t, "dec $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0xd7: sprintf(t, "cmp [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
|
||
|
|
case 0xd8: sprintf(t, "cld "); break;
|
||
|
|
case 0xd9: sprintf(t, "cmp $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
|
||
|
|
case 0xda: sprintf(t, "phx "); break;
|
||
|
|
case 0xdb: sprintf(t, "stp "); break;
|
||
|
|
case 0xdc: sprintf(t, "jmp [$%.4x] [%.6x]", op16, decode(OPTYPE_ILADDR, op16)); break;
|
||
|
|
case 0xdd: sprintf(t, "cmp $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0xde: sprintf(t, "dec $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0xdf: sprintf(t, "cmp $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
|
||
|
|
case 0xe0: if(x8)sprintf(t, "cpx #$%.2x ", op8);
|
||
|
|
else sprintf(t, "cpx #$%.4x ", op16); break;
|
||
|
|
case 0xe1: sprintf(t, "sbc ($%.2x,x) [%.6x]", op8, decode(OPTYPE_IDPX, op8)); break;
|
||
|
|
case 0xe2: sprintf(t, "sep #$%.2x ", op8); break;
|
||
|
|
case 0xe3: sprintf(t, "sbc $%.2x,s [%.6x]", op8, decode(OPTYPE_SR, op8)); break;
|
||
|
|
case 0xe4: sprintf(t, "cpx $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xe5: sprintf(t, "sbc $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xe6: sprintf(t, "inc $%.2x [%.6x]", op8, decode(OPTYPE_DP, op8)); break;
|
||
|
|
case 0xe7: sprintf(t, "sbc [$%.2x] [%.6x]", op8, decode(OPTYPE_ILDP, op8)); break;
|
||
|
|
case 0xe8: sprintf(t, "inx "); break;
|
||
|
|
case 0xe9: if(a8)sprintf(t, "sbc #$%.2x ", op8);
|
||
|
|
else sprintf(t, "sbc #$%.4x ", op16); break;
|
||
|
|
case 0xea: sprintf(t, "nop "); break;
|
||
|
|
case 0xeb: sprintf(t, "xba "); break;
|
||
|
|
case 0xec: sprintf(t, "cpx $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xed: sprintf(t, "sbc $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xee: sprintf(t, "inc $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xef: sprintf(t, "sbc $%.6x [%.6x]", op24, decode(OPTYPE_LONG, op24)); break;
|
||
|
|
case 0xf0: sprintf(t, "beq $%.4x [%.6x]", uint16(decode(OPTYPE_RELB, op8)), decode(OPTYPE_RELB, op8)); break;
|
||
|
|
case 0xf1: sprintf(t, "sbc ($%.2x),y [%.6x]", op8, decode(OPTYPE_IDPY, op8)); break;
|
||
|
|
case 0xf2: sprintf(t, "sbc ($%.2x) [%.6x]", op8, decode(OPTYPE_IDP, op8)); break;
|
||
|
|
case 0xf3: sprintf(t, "sbc ($%.2x,s),y [%.6x]", op8, decode(OPTYPE_ISRY, op8)); break;
|
||
|
|
case 0xf4: sprintf(t, "pea $%.4x [%.6x]", op16, decode(OPTYPE_ADDR, op16)); break;
|
||
|
|
case 0xf5: sprintf(t, "sbc $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0xf6: sprintf(t, "inc $%.2x,x [%.6x]", op8, decode(OPTYPE_DPX, op8)); break;
|
||
|
|
case 0xf7: sprintf(t, "sbc [$%.2x],y [%.6x]", op8, decode(OPTYPE_ILDPY, op8)); break;
|
||
|
|
case 0xf8: sprintf(t, "sed "); break;
|
||
|
|
case 0xf9: sprintf(t, "sbc $%.4x,y [%.6x]", op16, decode(OPTYPE_ADDRY, op16)); break;
|
||
|
|
case 0xfa: sprintf(t, "plx "); break;
|
||
|
|
case 0xfb: sprintf(t, "xce "); break;
|
||
|
|
case 0xfc: sprintf(t, "jsr ($%.4x,x) [%.6x]", op16, decode(OPTYPE_IADDRX, op16)); break;
|
||
|
|
case 0xfd: sprintf(t, "sbc $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0xfe: sprintf(t, "inc $%.4x,x [%.6x]", op16, decode(OPTYPE_ADDRX, op16)); break;
|
||
|
|
case 0xff: sprintf(t, "sbc $%.6x,x [%.6x]", op24, decode(OPTYPE_LONGX, op24)); break;
|
||
|
|
}
|
||
|
|
|
||
|
|
#undef op8
|
||
|
|
#undef op16
|
||
|
|
#undef op24
|
||
|
|
#undef a8
|
||
|
|
#undef x8
|
||
|
|
|
||
|
|
strcat(s, t);
|
||
|
|
strcat(s, " ");
|
||
|
|
|
||
|
|
sprintf(t, "A:%.4x X:%.4x Y:%.4x S:%.4x D:%.4x DB:%.2x ",
|
||
|
|
regs.a.w, regs.x.w, regs.y.w, regs.s.w, regs.d.w, regs.db);
|
||
|
|
strcat(s, t);
|
||
|
|
|
||
|
|
if(regs.e) {
|
||
|
|
sprintf(t, "%c%c%c%c%c%c%c%c",
|
||
|
|
regs.p.n ? 'N' : 'n', regs.p.v ? 'V' : 'v',
|
||
|
|
regs.p.m ? '1' : '0', regs.p.x ? 'B' : 'b',
|
||
|
|
regs.p.d ? 'D' : 'd', regs.p.i ? 'I' : 'i',
|
||
|
|
regs.p.z ? 'Z' : 'z', regs.p.c ? 'C' : 'c');
|
||
|
|
} else {
|
||
|
|
sprintf(t, "%c%c%c%c%c%c%c%c",
|
||
|
|
regs.p.n ? 'N' : 'n', regs.p.v ? 'V' : 'v',
|
||
|
|
regs.p.m ? 'M' : 'm', regs.p.x ? 'X' : 'x',
|
||
|
|
regs.p.d ? 'D' : 'd', regs.p.i ? 'I' : 'i',
|
||
|
|
regs.p.z ? 'Z' : 'z', regs.p.c ? 'C' : 'c');
|
||
|
|
}
|
||
|
|
|
||
|
|
strcat(s, t);
|
||
|
|
strcat(s, " ");
|
||
|
|
|
||
|
|
sprintf(t, "V:%3d H:%4d", cpu.vcounter(), cpu.hcounter());
|
||
|
|
strcat(s, t);
|
||
|
|
}
|
||
|
|
|
||
|
|
//opcode_length() retrieves the length of the next opcode
|
||
|
|
//to be executed. It is used by the debugger to step over,
|
||
|
|
//disable and proceed cpu opcodes.
|
||
|
|
//
|
||
|
|
//5 and 6 are special cases, 5 is used for #consts based on
|
||
|
|
//the A register size, 6 for the X/Y register size. the
|
||
|
|
//rest are literal sizes. There's no need to test for
|
||
|
|
//emulation mode, as regs.p.m/regs.p.x should *always* be
|
||
|
|
//set in emulation mode.
|
||
|
|
|
||
|
|
uint8 CPUcore::opcode_length() {
|
||
|
|
uint8 op, len;
|
||
|
|
static uint8 op_len_tbl[256] = {
|
||
|
|
//0,1,2,3, 4,5,6,7, 8,9,a,b, c,d,e,f
|
||
|
|
|
||
|
|
2,2,2,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0x0n
|
||
|
|
2,2,2,2, 2,2,2,2, 1,3,1,1, 3,3,3,4, //0x1n
|
||
|
|
3,2,4,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0x2n
|
||
|
|
2,2,2,2, 2,2,2,2, 1,3,1,1, 3,3,3,4, //0x3n
|
||
|
|
|
||
|
|
1,2,2,2, 3,2,2,2, 1,5,1,1, 3,3,3,4, //0x4n
|
||
|
|
2,2,2,2, 3,2,2,2, 1,3,1,1, 4,3,3,4, //0x5n
|
||
|
|
1,2,3,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0x6n
|
||
|
|
2,2,2,2, 2,2,2,2, 1,3,1,1, 3,3,3,4, //0x7n
|
||
|
|
|
||
|
|
2,2,3,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0x8n
|
||
|
|
2,2,2,2, 2,2,2,2, 1,3,1,1, 3,3,3,4, //0x9n
|
||
|
|
6,2,6,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0xan
|
||
|
|
2,2,2,2, 2,2,2,2, 1,3,1,1, 3,3,3,4, //0xbn
|
||
|
|
|
||
|
|
6,2,2,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0xcn
|
||
|
|
2,2,2,2, 2,2,2,2, 1,3,1,1, 3,3,3,4, //0xdn
|
||
|
|
6,2,2,2, 2,2,2,2, 1,5,1,1, 3,3,3,4, //0xen
|
||
|
|
2,2,2,2, 3,2,2,2, 1,3,1,1, 3,3,3,4 //0xfn
|
||
|
|
};
|
||
|
|
|
||
|
|
if(false /* in_opcode() == true */) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
op = dreadb(regs.pc.d);
|
||
|
|
len = op_len_tbl[op];
|
||
|
|
if(len == 5) return (regs.e || regs.p.m) ? 2 : 3;
|
||
|
|
if(len == 6) return (regs.e || regs.p.x) ? 2 : 3;
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|