////////////////////////////////////////////////////
// Run!
void Cpu::run(timestamp_t runto)
{
if(cpuJammed && (curCyc() < runto))
{
setMainTimestamp(runto);
}
while( curCyc() < runto )
{
/////////////////////////////////////
// Are we to take an interrupt
if(wantInterrupt)
{
performInterrupt(false);
continue;
}
if( *tracer )
tracer->traceCpuLine( cpu );
/////////////////////////////////////
// No interrupt, do an instruction
u8 opcode = rd( cpu.PC++ );
switch(opcode)
{
/* Branches */
case 0x10: adBranch( !cpu.getN() ); break; /* BPL */
case 0x30: adBranch( cpu.getN() ); break; /* BMI */
case 0x50: adBranch( !cpu.getV() ); break; /* BVC */
case 0x70: adBranch( cpu.getV() ); break; /* BVS */
case 0x90: adBranch( !cpu.getC() ); break; /* BCC */
case 0xB0: adBranch( cpu.getC() ); break; /* BCS */
case 0xD0: adBranch( !cpu.getZ() ); break; /* BNE */
case 0xF0: adBranch( cpu.getZ() ); break; /* BEQ */
/* Flag flip-flop */
case 0x18: adImplied(); cpu.setC(0); break; /* CLC */
case 0x38: adImplied(); cpu.setC(1); break; /* SEC */
case 0x58: adImplied(); cpu.setI(0); break; /* CLI */
case 0x78: adImplied(); cpu.setI(1); break; /* SEI */
case 0xB8: adImplied(); cpu.setV(0); break; /* CLV */
case 0xD8: adImplied(); cpu.setD(0); break; /* CLD */
case 0xF8: adImplied(); cpu.setD(1); break; /* SED */
/* Stack push/pull */
case 0x08: adPush( cpu.getStatus(true) ); break; /* PHP */
case 0x28: cpu.setStatus( adPull() ); break; /* PLP */
case 0x48: adPush( cpu.A ); break; /* PHA */
case 0x68: cpu.NZ( cpu.A = adPull() ); break; /* PLA */
/* Reg Xfer */
case 0xAA: adImplied(); cpu.NZ( cpu.X = cpu.A ); break; /* TAX */
case 0xA8: adImplied(); cpu.NZ( cpu.Y = cpu.A ); break; /* TAY */
case 0xBA: adImplied(); cpu.NZ( cpu.X = cpu.SP ); break; /* TSX */
case 0x8A: adImplied(); cpu.NZ( cpu.A = cpu.X ); break; /* TXA */
case 0x9A: adImplied(); cpu.SP = cpu.X; break; /* TXS */
case 0x98: adImplied(); cpu.NZ( cpu.A = cpu.Y ); break; /* TYA */
/* Misc */
case 0x00: performInterrupt(true); break; /* BRK */
case 0x4C: full_JMP(); break; /* JMP $xxxx */
case 0x6C: full_JMP_Indirect(); break; /* JMP ($xxxx) */
case 0x20: full_JSR(); break; /* JSR $xxxx */
case 0xEA: adImplied(); break; /* NOP */
case 0x40: full_RTI(); break; /* RTI */
case 0x60: full_RTS(); break; /* RTS */
/* ADC */
case 0x69: ADC( adRdIm() ); break;
case 0x65: ADC( adRdZp() ); break;
case 0x75: ADC( adRdZx() ); break;
case 0x6D: ADC( adRdAb() ); break;
case 0x7D: ADC( adRdAx() ); break;
case 0x79: ADC( adRdAy() ); break;
case 0x61: ADC( adRdIx() ); break;
case 0x71: ADC( adRdIy() ); break;
/* AND */
case 0x29: AND( adRdIm() ); break;
case 0x25: AND( adRdZp() ); break;
case 0x35: AND( adRdZx() ); break;
case 0x2D: AND( adRdAb() ); break;
case 0x3D: AND( adRdAx() ); break;
case 0x39: AND( adRdAy() ); break;
case 0x21: AND( adRdIx() ); break;
case 0x31: AND( adRdIy() ); break;
/* ASL */
case 0x0A: adImplied(); ASL(cpu.A); break;
case 0x06: adRWZp( &Cpu::ASL ); break;
case 0x16: adRWZx( &Cpu::ASL ); break;
case 0x0E: adRWAb( &Cpu::ASL ); break;
case 0x1E: adRWAx( &Cpu::ASL ); break;
/* BIT */
case 0x24: BIT( adRdZp() ); break;
case 0x2C: BIT( adRdAb() ); break;
/* CMP */
case 0xC9: CMP( adRdIm() ); break;
case 0xC5: CMP( adRdZp() ); break;
case 0xD5: CMP( adRdZx() ); break;
case 0xCD: CMP( adRdAb() ); break;
case 0xDD: CMP( adRdAx() ); break;
case 0xD9: CMP( adRdAy() ); break;
case 0xC1: CMP( adRdIx() ); break;
case 0xD1: CMP( adRdIy() ); break;
/* CPX */
case 0xE0: CPX( adRdIm() ); break;
case 0xE4: CPX( adRdZp() ); break;
case 0xEC: CPX( adRdAb() ); break;
/* CPY */
case 0xC0: CPY( adRdIm() ); break;
case 0xC4: CPY( adRdZp() ); break;
case 0xCC: CPY( adRdAb() ); break;
/* DEC */
case 0xCA: adImplied(); DEC(cpu.X); break; /* DEX */
case 0x88: adImplied(); DEC(cpu.Y); break; /* DEY */
case 0xC6: adRWZp( &Cpu::DEC ); break;
case 0xD6: adRWZx( &Cpu::DEC ); break;
case 0xCE: adRWAb( &Cpu::DEC ); break;
case 0xDE: adRWAx( &Cpu::DEC ); break;
/* EOR */
case 0x49: EOR( adRdIm() ); break;
case 0x45: EOR( adRdZp() ); break;
case 0x55: EOR( adRdZx() ); break;
case 0x4D: EOR( adRdAb() ); break;
case 0x5D: EOR( adRdAx() ); break;
case 0x59: EOR( adRdAy() ); break;
case 0x41: EOR( adRdIx() ); break;
case 0x51: EOR( adRdIy() ); break;
/* INC */
case 0xE8: adImplied(); INC(cpu.X); break; /* INX */
case 0xC8: adImplied(); INC(cpu.Y); break; /* INY */
case 0xE6: adRWZp( &Cpu::INC ); break;
case 0xF6: adRWZx( &Cpu::INC ); break;
case 0xEE: adRWAb( &Cpu::INC ); break;
case 0xFE: adRWAx( &Cpu::INC ); break;
/* LDA */
case 0xA9: cpu.NZ( cpu.A = adRdIm() ); break;
case 0xA5: cpu.NZ( cpu.A = adRdZp() ); break;
case 0xB5: cpu.NZ( cpu.A = adRdZx() ); break;
case 0xAD: cpu.NZ( cpu.A = adRdAb() ); break;
case 0xBD: cpu.NZ( cpu.A = adRdAx() ); break;
case 0xB9: cpu.NZ( cpu.A = adRdAy() ); break;
case 0xA1: cpu.NZ( cpu.A = adRdIx() ); break;
case 0xB1: cpu.NZ( cpu.A = adRdIy() ); break;
/* LDX */
case 0xA2: cpu.NZ( cpu.X = adRdIm() ); break;
case 0xA6: cpu.NZ( cpu.X = adRdZp() ); break;
case 0xB6: cpu.NZ( cpu.X = adRdZy() ); break;
case 0xAE: cpu.NZ( cpu.X = adRdAb() ); break;
case 0xBE: cpu.NZ( cpu.X = adRdAy() ); break;
/* LDY */
case 0xA0: cpu.NZ( cpu.Y = adRdIm() ); break;
case 0xA4: cpu.NZ( cpu.Y = adRdZp() ); break;
case 0xB4: cpu.NZ( cpu.Y = adRdZx() ); break;
case 0xAC: cpu.NZ( cpu.Y = adRdAb() ); break;
case 0xBC: cpu.NZ( cpu.Y = adRdAx() ); break;
/* LSR */
case 0x4A: adImplied(); LSR(cpu.A); break;
case 0x46: adRWZp( &Cpu::LSR ); break;
case 0x56: adRWZx( &Cpu::LSR ); break;
case 0x4E: adRWAb( &Cpu::LSR ); break;
case 0x5E: adRWAx( &Cpu::LSR ); break;
/* ORA */
case 0x09: ORA( adRdIm() ); break;
case 0x05: ORA( adRdZp() ); break;
case 0x15: ORA( adRdZx() ); break;
case 0x0D: ORA( adRdAb() ); break;
case 0x1D: ORA( adRdAx() ); break;
case 0x19: ORA( adRdAy() ); break;
case 0x01: ORA( adRdIx() ); break;
case 0x11: ORA( adRdIy() ); break;
/* ROL */
case 0x2A: adImplied(); ROL(cpu.A); break;
case 0x26: adRWZp( &Cpu::ROL ); break;
case 0x36: adRWZx( &Cpu::ROL ); break;
case 0x2E: adRWAb( &Cpu::ROL ); break;
case 0x3E: adRWAx( &Cpu::ROL ); break;
/* ROR */
case 0x6A: adImplied(); ROR(cpu.A); break;
case 0x66: adRWZp( &Cpu::ROR ); break;
case 0x76: adRWZx( &Cpu::ROR ); break;
case 0x6E: adRWAb( &Cpu::ROR ); break;
case 0x7E: adRWAx( &Cpu::ROR ); break;
/* SBC */
case 0xE9: SBC( adRdIm() ); break;
case 0xE5: SBC( adRdZp() ); break;
case 0xF5: SBC( adRdZx() ); break;
case 0xED: SBC( adRdAb() ); break;
case 0xFD: SBC( adRdAx() ); break;
case 0xF9: SBC( adRdAy() ); break;
case 0xE1: SBC( adRdIx() ); break;
case 0xF1: SBC( adRdIy() ); break;
/* STA */
case 0x85: adWrZp( cpu.A ); break;
case 0x95: adWrZx( cpu.A ); break;
case 0x8D: adWrAb( cpu.A ); break;
case 0x9D: adWrAx( cpu.A ); break;
case 0x99: adWrAy( cpu.A ); break;
case 0x81: adWrIx( cpu.A ); break;
case 0x91: adWrIy( cpu.A ); break;
/* STX */
case 0x86: adWrZp( cpu.X ); break;
case 0x96: adWrZy( cpu.X ); break;
case 0x8E: adWrAb( cpu.X ); break;
/* STY */
case 0x84: adWrZp( cpu.Y ); break;
case 0x94: adWrZx( cpu.Y ); break;
case 0x8C: adWrAb( cpu.Y ); break;
/////////////////////////////////////
// Unofficial ops
/* One offs */
case 0x0B: case 0x2B: ANC( adRdIm() ); break; /* ANC */
case 0x4B: ALR( adRdIm() ); break; /* ALR */
case 0x6B: ARR( adRdIm() ); break; /* ARR */
case 0xCB: AXS( adRdIm() ); break; /* AXS */
case 0xBB: LAS( adRdAy() ); break; /* LAS */
case 0xEB: SBC( adRdIm() ); break; /* alternative SBC */
case 0x9E: adWrAy_xxx( cpu.X ); break; /* SHX */
case 0x9C: adWrAx_xxx( cpu.Y ); break; /* SHY */
case 0x8B: XAA( adRdIm() ); break; /* XAA */
case 0x9B: cpu.SP = cpu.A & cpu.X; adWrAy_xxx( cpu.SP ); break; /* TAS */
/* AHX */
case 0x9F: adWrAy_xxx( cpu.A & cpu.X ); break;
case 0x93: adWrIy_xxx( cpu.A & cpu.X ); break;
/* DCP */
case 0xC7: adRWZp( &Cpu::DCP ); break;
case 0xD7: adRWZx( &Cpu::DCP ); break;
case 0xCF: adRWAb( &Cpu::DCP ); break;
case 0xDF: adRWAx( &Cpu::DCP ); break;
case 0xDB: adRWAy( &Cpu::DCP ); break;
case 0xC3: adRWIx( &Cpu::DCP ); break;
case 0xD3: adRWIy( &Cpu::DCP ); break;
/* ISC */
case 0xE7: adRWZp( &Cpu::ISC ); break;
case 0xF7: adRWZx( &Cpu::ISC ); break;
case 0xEF: adRWAb( &Cpu::ISC ); break;
case 0xFF: adRWAx( &Cpu::ISC ); break;
case 0xFB: adRWAy( &Cpu::ISC ); break;
case 0xE3: adRWIx( &Cpu::ISC ); break;
case 0xF3: adRWIy( &Cpu::ISC ); break;
/* LAX */
case 0xAB: LAX( adRdIm() ); break;
case 0xA7: LAX( adRdZp() ); break;
case 0xB7: LAX( adRdZy() ); break;
case 0xAF: LAX( adRdAb() ); break;
case 0xBF: LAX( adRdAy() ); break;
case 0xA3: LAX( adRdIx() ); break;
case 0xB3: LAX( adRdIy() ); break;
/* NOP */
case 0x1A: case 0x3A: case 0x5A: case 0x7A: case 0xDA: case 0xFA: adImplied();break;
case 0x04: case 0x44: case 0x64: adRdZp(); break;
case 0x14: case 0x34: case 0x54: case 0x74: case 0xD4: case 0xF4: adRdZx(); break;
case 0x80: case 0x82: case 0x89: case 0xC2: case 0xE2: adRdIm(); break;
case 0x0C: adRdAb(); break;
case 0x1C: case 0x3C: case 0x5C: case 0x7C: case 0xDC: case 0xFC: adRdAx(); break;
/* RLA */
case 0x27: adRWZp( &Cpu::RLA ); break;
case 0x37: adRWZx( &Cpu::RLA ); break;
case 0x2F: adRWAb( &Cpu::RLA ); break;
case 0x3F: adRWAx( &Cpu::RLA ); break;
case 0x3B: adRWAy( &Cpu::RLA ); break;
case 0x23: adRWIx( &Cpu::RLA ); break;
case 0x33: adRWIy( &Cpu::RLA ); break;
/* RRA */
case 0x67: adRWZp( &Cpu::RRA ); break;
case 0x77: adRWZx( &Cpu::RRA ); break;
case 0x6F: adRWAb( &Cpu::RRA ); break;
case 0x7F: adRWAx( &Cpu::RRA ); break;
case 0x7B: adRWAy( &Cpu::RRA ); break;
case 0x63: adRWIx( &Cpu::RRA ); break;
case 0x73: adRWIy( &Cpu::RRA ); break;
/* SAX */
case 0x87: adWrZp( cpu.A & cpu.X ); break;
case 0x97: adWrZy( cpu.A & cpu.X ); break;
case 0x8F: adWrAb( cpu.A & cpu.X ); break;
case 0x83: adWrIx( cpu.A & cpu.X ); break;
/* SLO */
case 0x07: adRWZp( &Cpu::SLO ); break;
case 0x17: adRWZx( &Cpu::SLO ); break;
case 0x0F: adRWAb( &Cpu::SLO ); break;
case 0x1F: adRWAx( &Cpu::SLO ); break;
case 0x1B: adRWAy( &Cpu::SLO ); break;
case 0x03: adRWIx( &Cpu::SLO ); break;
case 0x13: adRWIy( &Cpu::SLO ); break;
/* SRE */
case 0x47: adRWZp( &Cpu::SRE ); break;
case 0x57: adRWZx( &Cpu::SRE ); break;
case 0x4F: adRWAb( &Cpu::SRE ); break;
case 0x5F: adRWAx( &Cpu::SRE ); break;
case 0x5B: adRWAy( &Cpu::SRE ); break;
case 0x43: adRWIx( &Cpu::SRE ); break;
case 0x53: adRWIy( &Cpu::SRE ); break;
/* STP */
case 0x02: case 0x12: case 0x22: case 0x32: case 0x42: case 0x52:
case 0x62: case 0x72: case 0x92: case 0xB2: case 0xD2: case 0xF2:
cpuJammed = true;
setMainTimestamp(runto);
break;
}
}
}
//
// 柦椷幚峴
//
INT CPU::EXEC( INT request_cycles )
{
BYTE opcode; // 僆儁僐乕僪
INT OLD_cycles = TOTAL_cycles;
INT exec_cycles;
BYTE nmi_request, irq_request;
BOOL bClockProcess = m_bClockProcess;
// TEMP
register WORD EA;
register WORD ET;
register WORD WT;
register BYTE DT;
while( request_cycles > 0 ) {
exec_cycles = 0;
if( DMA_cycles ) {
if( request_cycles <= DMA_cycles ) {
DMA_cycles -= request_cycles;
TOTAL_cycles += request_cycles;
// 僋儘僢僋摨婜張棟
mapper->Clock( request_cycles );
#if DPCM_SYNCCLOCK
apu->SyncDPCM( request_cycles );
#endif
if( bClockProcess ) {
nes->Clock( request_cycles );
}
// nes->Clock( request_cycles );
goto _execute_exit;
} else {
exec_cycles += DMA_cycles;
// request_cycles -= DMA_cycles;
DMA_cycles = 0;
}
}
nmi_request = irq_request = 0;
opcode = OP6502( R.PC++ );
if( R.INT_pending ) {
if( R.INT_pending & NMI_FLAG ) {
nmi_request = 0xFF;
R.INT_pending &= ~NMI_FLAG;
} else
if( R.INT_pending & IRQ_MASK ) {
R.INT_pending &= ~IRQ_TRIGGER2;
if( !(R.P & I_FLAG) && opcode != 0x40 ) {
irq_request = 0xFF;
R.INT_pending &= ~IRQ_TRIGGER;
}
}
}
//增加指令预测忽略功能
//opcode
BYTE iInstructionLen =1;
switch (TraceAddrMode[opcode])
{
case IND:
case ADR:
case ABS:
case ABX:
case ABY:
iInstructionLen = 3;
break;
case IMM:
case ZPG:
case ZPX:
case ZPY:
case INX:
case INY:
iInstructionLen = 2;
break;
case IMP:case ACC:case ERR: break;
case REL:iInstructionLen = 2;break;
}
if( ((TraceArr[opcode][0]=='*') ||
(TraceArr[opcode][1]=='?'))&&
(!Config.emulator.bIllegalOp) )
{
//这里可以优化输出信息
//char str[111];
//DecodeInstruction (R.PC-1, str);
//DEBUGOUT( "Bad Instruction:%s\n",str);
R.PC=(R.PC-1)+iInstructionLen;
ADD_CYCLE(iInstructionLen*2);
goto end_is;
}
//
switch( opcode ) {
case 0x69: // ADC #$??
MR_IM(); ADC();
ADD_CYCLE(2);
break;
case 0x65: // ADC $??
MR_ZP(); ADC();
ADD_CYCLE(3);
break;
case 0x75: // ADC $??,X
MR_ZX(); ADC();
ADD_CYCLE(4);
break;
case 0x6D: // ADC $????
MR_AB(); ADC();
ADD_CYCLE(4);
break;
case 0x7D: // ADC $????,X
MR_AX(); ADC(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x79: // ADC $????,Y
MR_AY(); ADC(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x61: // ADC ($??,X)
MR_IX(); ADC();
ADD_CYCLE(6);
break;
case 0x71: // ADC ($??),Y
MR_IY(); ADC(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xE9: // SBC #$??
MR_IM(); SBC();
ADD_CYCLE(2);
break;
case 0xE5: // SBC $??
MR_ZP(); SBC();
ADD_CYCLE(3);
break;
case 0xF5: // SBC $??,X
MR_ZX(); SBC();
ADD_CYCLE(4);
break;
case 0xED: // SBC $????
MR_AB(); SBC();
ADD_CYCLE(4);
break;
case 0xFD: // SBC $????,X
MR_AX(); SBC(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xF9: // SBC $????,Y
MR_AY(); SBC(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xE1: // SBC ($??,X)
MR_IX(); SBC();
ADD_CYCLE(6);
break;
case 0xF1: // SBC ($??),Y
MR_IY(); SBC(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0xC6: // DEC $??
MR_ZP(); DEC(); MW_ZP();
ADD_CYCLE(5);
break;
case 0xD6: // DEC $??,X
MR_ZX(); DEC(); MW_ZP();
ADD_CYCLE(6);
break;
case 0xCE: // DEC $????
MR_AB(); DEC(); MW_EA();
ADD_CYCLE(6);
break;
case 0xDE: // DEC $????,X
MR_AX(); DEC(); MW_EA();
ADD_CYCLE(7);
break;
case 0xCA: // DEX
DEX();
ADD_CYCLE(2);
break;
case 0x88: // DEY
DEY();
ADD_CYCLE(2);
break;
case 0xE6: // INC $??
MR_ZP(); INC(); MW_ZP();
ADD_CYCLE(5);
break;
case 0xF6: // INC $??,X
MR_ZX(); INC(); MW_ZP();
ADD_CYCLE(6);
break;
case 0xEE: // INC $????
MR_AB(); INC(); MW_EA();
ADD_CYCLE(6);
break;
case 0xFE: // INC $????,X
MR_AX(); INC(); MW_EA();
ADD_CYCLE(7);
break;
case 0xE8: // INX
INX();
ADD_CYCLE(2);
break;
case 0xC8: // INY
INY();
ADD_CYCLE(2);
break;
case 0x29: // AND #$??
MR_IM(); AND();
ADD_CYCLE(2);
break;
case 0x25: // AND $??
MR_ZP(); AND();
ADD_CYCLE(3);
break;
case 0x35: // AND $??,X
MR_ZX(); AND();
ADD_CYCLE(4);
break;
case 0x2D: // AND $????
MR_AB(); AND();
ADD_CYCLE(4);
break;
case 0x3D: // AND $????,X
MR_AX(); AND(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x39: // AND $????,Y
MR_AY(); AND(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x21: // AND ($??,X)
MR_IX(); AND();
ADD_CYCLE(6);
break;
case 0x31: // AND ($??),Y
MR_IY(); AND(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0x0A: // ASL A
ASL_A();
ADD_CYCLE(2);
break;
case 0x06: // ASL $??
MR_ZP(); ASL(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x16: // ASL $??,X
MR_ZX(); ASL(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x0E: // ASL $????
MR_AB(); ASL(); MW_EA();
ADD_CYCLE(6);
break;
case 0x1E: // ASL $????,X
MR_AX(); ASL(); MW_EA();
ADD_CYCLE(7);
break;
case 0x24: // BIT $??
MR_ZP(); BIT();
ADD_CYCLE(3);
break;
case 0x2C: // BIT $????
MR_AB(); BIT();
ADD_CYCLE(4);
break;
case 0x49: // EOR #$??
MR_IM(); EOR();
ADD_CYCLE(2);
break;
case 0x45: // EOR $??
MR_ZP(); EOR();
ADD_CYCLE(3);
break;
case 0x55: // EOR $??,X
MR_ZX(); EOR();
ADD_CYCLE(4);
break;
case 0x4D: // EOR $????
MR_AB(); EOR();
ADD_CYCLE(4);
break;
case 0x5D: // EOR $????,X
MR_AX(); EOR(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x59: // EOR $????,Y
MR_AY(); EOR(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x41: // EOR ($??,X)
MR_IX(); EOR();
ADD_CYCLE(6);
break;
case 0x51: // EOR ($??),Y
MR_IY(); EOR(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0x4A: // LSR A
LSR_A();
ADD_CYCLE(2);
break;
case 0x46: // LSR $??
MR_ZP(); LSR(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x56: // LSR $??,X
MR_ZX(); LSR(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x4E: // LSR $????
MR_AB(); LSR(); MW_EA();
ADD_CYCLE(6);
break;
case 0x5E: // LSR $????,X
MR_AX(); LSR(); MW_EA();
ADD_CYCLE(7);
break;
case 0x09: // ORA #$??
MR_IM(); ORA();
ADD_CYCLE(2);
break;
case 0x05: // ORA $??
MR_ZP(); ORA();
ADD_CYCLE(3);
break;
case 0x15: // ORA $??,X
MR_ZX(); ORA();
ADD_CYCLE(4);
break;
case 0x0D: // ORA $????
MR_AB(); ORA();
ADD_CYCLE(4);
break;
case 0x1D: // ORA $????,X
MR_AX(); ORA(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x19: // ORA $????,Y
MR_AY(); ORA(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x01: // ORA ($??,X)
MR_IX(); ORA();
ADD_CYCLE(6);
break;
case 0x11: // ORA ($??),Y
MR_IY(); ORA(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0x2A: // ROL A
ROL_A();
ADD_CYCLE(2);
break;
case 0x26: // ROL $??
MR_ZP(); ROL(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x36: // ROL $??,X
MR_ZX(); ROL(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x2E: // ROL $????
MR_AB(); ROL(); MW_EA();
ADD_CYCLE(6);
break;
case 0x3E: // ROL $????,X
MR_AX(); ROL(); MW_EA();
ADD_CYCLE(7);
break;
case 0x6A: // ROR A
ROR_A();
ADD_CYCLE(2);
break;
case 0x66: // ROR $??
MR_ZP(); ROR(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x76: // ROR $??,X
MR_ZX(); ROR(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x6E: // ROR $????
MR_AB(); ROR(); MW_EA();
ADD_CYCLE(6);
break;
case 0x7E: // ROR $????,X
MR_AX(); ROR(); MW_EA();
ADD_CYCLE(7);
break;
case 0xA9: // LDA #$??
MR_IM(); LDA();
ADD_CYCLE(2);
break;
case 0xA5: // LDA $??
MR_ZP(); LDA();
ADD_CYCLE(3);
break;
case 0xB5: // LDA $??,X
MR_ZX(); LDA();
ADD_CYCLE(4);
break;
case 0xAD: // LDA $????
MR_AB(); LDA();
ADD_CYCLE(4);
break;
case 0xBD: // LDA $????,X
MR_AX(); LDA(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xB9: // LDA $????,Y
MR_AY(); LDA(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xA1: // LDA ($??,X)
MR_IX(); LDA();
ADD_CYCLE(6);
break;
case 0xB1: // LDA ($??),Y
MR_IY(); LDA(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0xA2: // LDX #$??
MR_IM(); LDX();
ADD_CYCLE(2);
break;
case 0xA6: // LDX $??
MR_ZP(); LDX();
ADD_CYCLE(3);
break;
case 0xB6: // LDX $??,Y
MR_ZY(); LDX();
ADD_CYCLE(4);
break;
case 0xAE: // LDX $????
MR_AB(); LDX();
ADD_CYCLE(4);
break;
case 0xBE: // LDX $????,Y
MR_AY(); LDX(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xA0: // LDY #$??
MR_IM(); LDY();
ADD_CYCLE(2);
break;
case 0xA4: // LDY $??
MR_ZP(); LDY();
ADD_CYCLE(3);
break;
case 0xB4: // LDY $??,X
MR_ZX(); LDY();
ADD_CYCLE(4);
break;
case 0xAC: // LDY $????
MR_AB(); LDY();
ADD_CYCLE(4);
break;
case 0xBC: // LDY $????,X
MR_AX(); LDY(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0x85: // STA $??
EA_ZP(); STA(); MW_ZP();
ADD_CYCLE(3);
break;
case 0x95: // STA $??,X
EA_ZX(); STA(); MW_ZP();
ADD_CYCLE(4);
break;
case 0x8D: // STA $????
EA_AB(); STA(); MW_EA();
ADD_CYCLE(4);
break;
case 0x9D: // STA $????,X
EA_AX(); STA(); MW_EA();
ADD_CYCLE(5);
break;
case 0x99: // STA $????,Y
EA_AY(); STA(); MW_EA();
ADD_CYCLE(5);
break;
case 0x81: // STA ($??,X)
EA_IX(); STA(); MW_EA();
ADD_CYCLE(6);
break;
case 0x91: // STA ($??),Y
EA_IY(); STA(); MW_EA();
ADD_CYCLE(6);
break;
case 0x86: // STX $??
EA_ZP(); STX(); MW_ZP();
ADD_CYCLE(3);
break;
case 0x96: // STX $??,Y
EA_ZY(); STX(); MW_ZP();
ADD_CYCLE(4);
break;
case 0x8E: // STX $????
EA_AB(); STX(); MW_EA();
ADD_CYCLE(4);
break;
case 0x84: // STY $??
EA_ZP(); STY(); MW_ZP();
ADD_CYCLE(3);
break;
case 0x94: // STY $??,X
EA_ZX(); STY(); MW_ZP();
ADD_CYCLE(4);
break;
case 0x8C: // STY $????
EA_AB(); STY(); MW_EA();
ADD_CYCLE(4);
break;
case 0xAA: // TAX
TAX();
ADD_CYCLE(2);
break;
case 0x8A: // TXA
TXA();
ADD_CYCLE(2);
break;
case 0xA8: // TAY
TAY();
ADD_CYCLE(2);
break;
case 0x98: // TYA
TYA();
ADD_CYCLE(2);
break;
case 0xBA: // TSX
TSX();
ADD_CYCLE(2);
break;
case 0x9A: // TXS
TXS();
ADD_CYCLE(2);
break;
case 0xC9: // CMP #$??
MR_IM(); CMP_();
ADD_CYCLE(2);
break;
case 0xC5: // CMP $??
MR_ZP(); CMP_();
ADD_CYCLE(3);
break;
case 0xD5: // CMP $??,X
MR_ZX(); CMP_();
ADD_CYCLE(4);
break;
case 0xCD: // CMP $????
MR_AB(); CMP_();
ADD_CYCLE(4);
break;
case 0xDD: // CMP $????,X
MR_AX(); CMP_(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xD9: // CMP $????,Y
MR_AY(); CMP_(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xC1: // CMP ($??,X)
MR_IX(); CMP_();
ADD_CYCLE(6);
break;
case 0xD1: // CMP ($??),Y
MR_IY(); CMP_(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0xE0: // CPX #$??
MR_IM(); CPX();
ADD_CYCLE(2);
break;
case 0xE4: // CPX $??
MR_ZP(); CPX();
ADD_CYCLE(3);
break;
case 0xEC: // CPX $????
MR_AB(); CPX();
ADD_CYCLE(4);
break;
case 0xC0: // CPY #$??
MR_IM(); CPY();
ADD_CYCLE(2);
break;
case 0xC4: // CPY $??
MR_ZP(); CPY();
ADD_CYCLE(3);
break;
case 0xCC: // CPY $????
MR_AB(); CPY();
ADD_CYCLE(4);
break;
case 0x90: // BCC
MR_IM(); BCC();
ADD_CYCLE(2);
break;
case 0xB0: // BCS
MR_IM(); BCS();
ADD_CYCLE(2);
break;
case 0xF0: // BEQ
MR_IM(); BEQ();
ADD_CYCLE(2);
break;
case 0x30: // BMI
MR_IM(); BMI();
ADD_CYCLE(2);
break;
case 0xD0: // BNE
MR_IM(); BNE();
ADD_CYCLE(2);
break;
case 0x10: // BPL
MR_IM(); BPL();
ADD_CYCLE(2);
break;
case 0x50: // BVC
MR_IM(); BVC();
ADD_CYCLE(2);
break;
case 0x70: // BVS
MR_IM(); BVS();
ADD_CYCLE(2);
break;
case 0x4C: // JMP $????
JMP();
ADD_CYCLE(3);
break;
case 0x6C: // JMP ($????)
JMP_ID();
ADD_CYCLE(5);
break;
case 0x20: // JSR
JSR();
ADD_CYCLE(6);
break;
case 0x40: // RTI
RTI();
ADD_CYCLE(6);
break;
case 0x60: // RTS
RTS();
ADD_CYCLE(6);
break;
// 僼儔僌惂屼宯
case 0x18: // CLC
CLC();
ADD_CYCLE(2);
break;
case 0xD8: // CLD
CLD();
ADD_CYCLE(2);
break;
case 0x58: // CLI
CLI();
ADD_CYCLE(2);
break;
case 0xB8: // CLV
CLV();
ADD_CYCLE(2);
break;
case 0x38: // SEC
SEC();
ADD_CYCLE(2);
break;
case 0xF8: // SED
SED();
ADD_CYCLE(2);
break;
case 0x78: // SEI
SEI();
ADD_CYCLE(2);
break;
// 僗僞僢僋宯
case 0x48: // PHA
PUSH( R.A );
ADD_CYCLE(3);
break;
case 0x08: // PHP
PUSH( R.P | B_FLAG );
ADD_CYCLE(3);
break;
case 0x68: // PLA (N-----Z-)
R.A = POP();
SET_ZN_FLAG(R.A);
ADD_CYCLE(4);
break;
case 0x28: // PLP
R.P = POP() | R_FLAG;
ADD_CYCLE(4);
break;
// 偦偺懠
case 0x00: // BRK
BRK();
ADD_CYCLE(7);
break;
case 0xEA: // NOP
ADD_CYCLE(2);
break;
// 枹岞奐柦椷孮
case 0x0B: // ANC #$??
case 0x2B: // ANC #$??
MR_IM(); ANC();
ADD_CYCLE(2);
break;
case 0x8B: // ANE #$??
MR_IM(); ANE();
ADD_CYCLE(2);
break;
case 0x6B: // ARR #$??
MR_IM(); ARR();
ADD_CYCLE(2);
break;
case 0x4B: // ASR #$??
MR_IM(); ASR();
ADD_CYCLE(2);
break;
case 0xC7: // DCP $??
MR_ZP(); DCP(); MW_ZP();
ADD_CYCLE(5);
break;
case 0xD7: // DCP $??,X
MR_ZX(); DCP(); MW_ZP();
ADD_CYCLE(6);
break;
case 0xCF: // DCP $????
MR_AB(); DCP(); MW_EA();
ADD_CYCLE(6);
break;
case 0xDF: // DCP $????,X
MR_AX(); DCP(); MW_EA();
ADD_CYCLE(7);
break;
case 0xDB: // DCP $????,Y
MR_AY(); DCP(); MW_EA();
ADD_CYCLE(7);
break;
case 0xC3: // DCP ($??,X)
MR_IX(); DCP(); MW_EA();
ADD_CYCLE(8);
break;
case 0xD3: // DCP ($??),Y
MR_IY(); DCP(); MW_EA();
ADD_CYCLE(8);
break;
case 0xE7: // ISB $??
MR_ZP(); ISB(); MW_ZP();
ADD_CYCLE(5);
break;
case 0xF7: // ISB $??,X
MR_ZX(); ISB(); MW_ZP();
ADD_CYCLE(5);
break;
case 0xEF: // ISB $????
MR_AB(); ISB(); MW_EA();
ADD_CYCLE(5);
break;
case 0xFF: // ISB $????,X
MR_AX(); ISB(); MW_EA();
ADD_CYCLE(5);
break;
case 0xFB: // ISB $????,Y
MR_AY(); ISB(); MW_EA();
ADD_CYCLE(5);
break;
case 0xE3: // ISB ($??,X)
MR_IX(); ISB(); MW_EA();
ADD_CYCLE(5);
break;
case 0xF3: // ISB ($??),Y
MR_IY(); ISB(); MW_EA();
ADD_CYCLE(5);
break;
case 0xBB: // LAS $????,Y
MR_AY(); LAS(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xA7: // LAX $??
MR_ZP(); LAX();
ADD_CYCLE(3);
break;
case 0xB7: // LAX $??,Y
MR_ZY(); LAX();
ADD_CYCLE(4);
break;
case 0xAF: // LAX $????
MR_AB(); LAX();
ADD_CYCLE(4);
break;
case 0xBF: // LAX $????,Y
MR_AY(); LAX(); CHECK_EA();
ADD_CYCLE(4);
break;
case 0xA3: // LAX ($??,X)
MR_IX(); LAX();
ADD_CYCLE(6);
break;
case 0xB3: // LAX ($??),Y
MR_IY(); LAX(); CHECK_EA();
ADD_CYCLE(5);
break;
case 0xAB: // LXA #$??
MR_IM(); LXA();
ADD_CYCLE(2);
break;
case 0x27: // RLA $??
MR_ZP(); RLA(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x37: // RLA $??,X
MR_ZX(); RLA(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x2F: // RLA $????
MR_AB(); RLA(); MW_EA();
ADD_CYCLE(6);
break;
case 0x3F: // RLA $????,X
MR_AX(); RLA(); MW_EA();
ADD_CYCLE(7);
break;
case 0x3B: // RLA $????,Y
MR_AY(); RLA(); MW_EA();
ADD_CYCLE(7);
break;
case 0x23: // RLA ($??,X)
MR_IX(); RLA(); MW_EA();
ADD_CYCLE(8);
break;
case 0x33: // RLA ($??),Y
MR_IY(); RLA(); MW_EA();
ADD_CYCLE(8);
break;
case 0x67: // RRA $??
MR_ZP(); RRA(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x77: // RRA $??,X
MR_ZX(); RRA(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x6F: // RRA $????
MR_AB(); RRA(); MW_EA();
ADD_CYCLE(6);
break;
case 0x7F: // RRA $????,X
MR_AX(); RRA(); MW_EA();
ADD_CYCLE(7);
break;
case 0x7B: // RRA $????,Y
MR_AY(); RRA(); MW_EA();
ADD_CYCLE(7);
break;
case 0x63: // RRA ($??,X)
MR_IX(); RRA(); MW_EA();
ADD_CYCLE(8);
break;
case 0x73: // RRA ($??),Y
MR_IY(); RRA(); MW_EA();
ADD_CYCLE(8);
break;
case 0x87: // SAX $??
MR_ZP(); SAX(); MW_ZP();
ADD_CYCLE(3);
break;
case 0x97: // SAX $??,Y
MR_ZY(); SAX(); MW_ZP();
ADD_CYCLE(4);
break;
case 0x8F: // SAX $????
MR_AB(); SAX(); MW_EA();
ADD_CYCLE(4);
break;
case 0x83: // SAX ($??,X)
MR_IX(); SAX(); MW_EA();
ADD_CYCLE(6);
break;
case 0xCB: // SBX #$??
MR_IM(); SBX();
ADD_CYCLE(2);
break;
case 0x9F: // SHA $????,Y
MR_AY(); SHA(); MW_EA();
ADD_CYCLE(5);
break;
case 0x93: // SHA ($??),Y
MR_IY(); SHA(); MW_EA();
ADD_CYCLE(6);
break;
case 0x9B: // SHS $????,Y
MR_AY(); SHS(); MW_EA();
ADD_CYCLE(5);
break;
case 0x9E: // SHX $????,Y
MR_AY(); SHX(); MW_EA();
ADD_CYCLE(5);
break;
case 0x9C: // SHY $????,X
MR_AX(); SHY(); MW_EA();
ADD_CYCLE(5);
break;
case 0x07: // SLO $??
MR_ZP(); SLO(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x17: // SLO $??,X
MR_ZX(); SLO(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x0F: // SLO $????
MR_AB(); SLO(); MW_EA();
ADD_CYCLE(6);
break;
case 0x1F: // SLO $????,X
MR_AX(); SLO(); MW_EA();
ADD_CYCLE(7);
break;
case 0x1B: // SLO $????,Y
MR_AY(); SLO(); MW_EA();
ADD_CYCLE(7);
break;
case 0x03: // SLO ($??,X)
MR_IX(); SLO(); MW_EA();
ADD_CYCLE(8);
break;
case 0x13: // SLO ($??),Y
MR_IY(); SLO(); MW_EA();
ADD_CYCLE(8);
break;
case 0x47: // SRE $??
MR_ZP(); SRE(); MW_ZP();
ADD_CYCLE(5);
break;
case 0x57: // SRE $??,X
MR_ZX(); SRE(); MW_ZP();
ADD_CYCLE(6);
break;
case 0x4F: // SRE $????
MR_AB(); SRE(); MW_EA();
ADD_CYCLE(6);
break;
case 0x5F: // SRE $????,X
MR_AX(); SRE(); MW_EA();
ADD_CYCLE(7);
break;
case 0x5B: // SRE $????,Y
MR_AY(); SRE(); MW_EA();
ADD_CYCLE(7);
break;
case 0x43: // SRE ($??,X)
MR_IX(); SRE(); MW_EA();
ADD_CYCLE(8);
break;
case 0x53: // SRE ($??),Y
MR_IY(); SRE(); MW_EA();
ADD_CYCLE(8);
break;
case 0xEB: // SBC #$?? (Unofficial)
MR_IM(); SBC();
ADD_CYCLE(2);
break;
case 0x1A: // NOP (Unofficial)
case 0x3A: // NOP (Unofficial)
case 0x5A: // NOP (Unofficial)
case 0x7A: // NOP (Unofficial)
case 0xDA: // NOP (Unofficial)
case 0xFA: // NOP (Unofficial)
ADD_CYCLE(2);
break;
case 0x80: // DOP (CYCLES 2)
case 0x82: // DOP (CYCLES 2)
case 0x89: // DOP (CYCLES 2)
case 0xC2: // DOP (CYCLES 2)
case 0xE2: // DOP (CYCLES 2)
R.PC++;
ADD_CYCLE(2);
break;
case 0x04: // DOP (CYCLES 3)
case 0x44: // DOP (CYCLES 3)
case 0x64: // DOP (CYCLES 3)
R.PC++;
ADD_CYCLE(3);
break;
case 0x14: // DOP (CYCLES 4)
case 0x34: // DOP (CYCLES 4)
case 0x54: // DOP (CYCLES 4)
case 0x74: // DOP (CYCLES 4)
case 0xD4: // DOP (CYCLES 4)
case 0xF4: // DOP (CYCLES 4)
R.PC++;
ADD_CYCLE(4);
break;
case 0x0C: // TOP
case 0x1C: // TOP
case 0x3C: // TOP
case 0x5C: // TOP
case 0x7C: // TOP
case 0xDC: // TOP
case 0xFC: // TOP
R.PC+=2;
ADD_CYCLE(4);
break;
case 0x02: /* JAM */
case 0x12: /* JAM */
case 0x22: /* JAM */
case 0x32: /* JAM */
case 0x42: /* JAM */
case 0x52: /* JAM */
case 0x62: /* JAM */
case 0x72: /* JAM */
case 0x92: /* JAM */
case 0xB2: /* JAM */
case 0xD2: /* JAM */
case 0xF2: /* JAM */
default:
if( !Config.emulator.bIllegalOp )
{
throw CApp::GetErrorString( IDS_ERROR_ILLEGALOPCODE );
goto _execute_exit;
}
else
{
R.PC--;
ADD_CYCLE(4);
}
break;
// default:
// __assume(0);
}
end_is: __asm nop;
if( nmi_request ) {
_NMI();
} else
if( irq_request ) {
_IRQ();
}
request_cycles -= exec_cycles;
TOTAL_cycles += exec_cycles;
// 僋儘僢僋摨婜張棟
mapper->Clock( exec_cycles );
#if DPCM_SYNCCLOCK
apu->SyncDPCM( exec_cycles );
#endif
if( bClockProcess ) {
nes->Clock( exec_cycles );
}
// nes->Clock( exec_cycles );
}
_execute_exit:
#if !DPCM_SYNCCLOCK
apu->SyncDPCM( TOTAL_cycles - OLD_cycles );
#endif
return TOTAL_cycles - OLD_cycles;
}