void S9xMainLoop (void)
{
for (;;)
{
APU_EXECUTE();
if (CPU.Flags)
{
if (CPU.Flags & NMI_FLAG)
{
if (Timings.NMITriggerPos <= CPU.Cycles)
{
CPU.Flags &= ~NMI_FLAG;
Timings.NMITriggerPos = 0xffff;
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
Registers.PCw++;
}
S9xOpcode_NMI();
}
}
#ifdef DEBUGGER
if ((CPU.Flags & BREAK_FLAG) && !(CPU.Flags & SINGLE_STEP_FLAG))
{
for (int Break = 0; Break != 6; Break++)
{
if (S9xBreakpoint[Break].Enabled &&
S9xBreakpoint[Break].Bank == Registers.PB &&
S9xBreakpoint[Break].Address == Registers.PCw)
{
if (S9xBreakpoint[Break].Enabled == 2)
S9xBreakpoint[Break].Enabled = TRUE;
else
CPU.Flags |= DEBUG_MODE_FLAG;
}
}
}
#endif
CHECK_SOUND();
if (CPU.Flags & IRQ_PENDING_FLAG)
{
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
Registers.PCw++;
}
if (CPU.IRQActive && !Settings.DisableIRQ)
{
if (!CheckFlag(IRQ))
S9xOpcode_IRQ();
}
else
CPU.Flags &= ~IRQ_PENDING_FLAG;
}
if (CPU.Flags & SCAN_KEYS_FLAG)
break;
#ifdef DEBUGGER
if (CPU.Flags & DEBUG_MODE_FLAG)
break;
if (CPU.Flags & TRACE_FLAG)
S9xTrace();
if (CPU.Flags & SINGLE_STEP_FLAG)
{
CPU.Flags &= ~SINGLE_STEP_FLAG;
CPU.Flags |= DEBUG_MODE_FLAG;
}
#endif
}
#ifdef CPU_SHUTDOWN
CPU.PBPCAtOpcodeStart = Registers.PBPC;
#endif
register uint8 Op;
register struct SOpcodes *Opcodes;
if (CPU.PCBase)
{
Op = CPU.PCBase[Registers.PCw];
CPU.Cycles += CPU.MemSpeed;
Opcodes = ICPU.S9xOpcodes;
}
else
{
Op = S9xGetByte(Registers.PBPC);
OpenBus = Op;
Opcodes = S9xOpcodesSlow;
}
if ((Registers.PCw&MEMMAP_MASK) + ICPU.S9xOpLengths[Op] >= MEMMAP_BLOCK_SIZE)
{
uint8 *oldPCBase = CPU.PCBase;
CPU.PCBase = GetBasePointer(ICPU.ShiftedPB + ((uint16) (Registers.PCw + 4)));
if (oldPCBase!=CPU.PCBase || (Registers.PCw&~MEMMAP_MASK) == (0xffff & ~MEMMAP_MASK))
Opcodes = S9xOpcodesSlow;
}
Registers.PCw++;
(*Opcodes[Op].S9xOpcode)();
S9xUpdateAPUTimer();
if (SA1.Executing)
S9xSA1MainLoop();
if (CPU.Cycles >= CPU.NextEvent)
S9xDoHEventProcessing();
}
S9xPackStatus();
APURegisters.PC = IAPU.PC - IAPU.RAM;
S9xAPUPackStatus();
if (CPU.Flags & SCAN_KEYS_FLAG)
{
#ifdef DEBUGGER
if (!(CPU.Flags & FRAME_ADVANCE_FLAG))
#endif
S9xSyncSpeed();
CPU.Flags &= ~SCAN_KEYS_FLAG;
}
}
void S9xMainLoop (void)
{
for (;;)
{
#ifdef DEBUG_MAXCOUNT
CPU.GlobalLoopCount++;
if(Settings.MaxCount && CPU.GlobalLoopCount == Settings.MaxCount) {
fprintf(stderr, "Max loop count reached: %ld \n", Settings.MaxCount);
S9xExit();
}
#endif
APU_EXECUTE ();
if (CPU.Flags)
{
if (CPU.Flags & NMI_FLAG)
{
if (--CPU.NMICycleCount == 0)
{
CPU.Flags &= ~NMI_FLAG;
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
CPU.PC++;
}
S9xOpcode_NMI ();
}
}
#ifdef DEBUGGER
if ((CPU.Flags & BREAK_FLAG) &&
!(CPU.Flags & SINGLE_STEP_FLAG))
{
for (int Break = 0; Break != 6; Break++)
{
if (S9xBreakpoint[Break].Enabled &&
S9xBreakpoint[Break].Bank == Registers.PB &&
S9xBreakpoint[Break].Address == CPU.PC - CPU.PCBase)
{
if (S9xBreakpoint[Break].Enabled == 2)
S9xBreakpoint[Break].Enabled = TRUE;
else
CPU.Flags |= DEBUG_MODE_FLAG;
}
}
}
#endif
CHECK_SOUND ();
if (CPU.Flags & IRQ_PENDING_FLAG)
{
if (CPU.IRQCycleCount == 0)
{
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
CPU.PC++;
}
if (CPU.IRQActive && !Settings.DisableIRQ)
{
if (!CheckFlag (IRQ))
S9xOpcode_IRQ ();
}
else
CPU.Flags &= ~IRQ_PENDING_FLAG;
}
else
{
if(--CPU.IRQCycleCount==0 && CheckFlag (IRQ))
CPU.IRQCycleCount=1;
}
}
#ifdef DEBUGGER
if (CPU.Flags & DEBUG_MODE_FLAG)
break;
#endif
if (CPU.Flags & SCAN_KEYS_FLAG)
break;
#ifdef DEBUGGER
if (CPU.Flags & TRACE_FLAG)
S9xTrace ();
if (CPU.Flags & SINGLE_STEP_FLAG)
{
CPU.Flags &= ~SINGLE_STEP_FLAG;
CPU.Flags |= DEBUG_MODE_FLAG;
}
#endif
}
#ifdef CPU_SHUTDOWN
CPU.PCAtOpcodeStart = CPU.PC;
#endif
CPU.Cycles += CPU.MemSpeed;
(*ICPU.S9xOpcodes [*CPU.PC++].S9xOpcode) ();
S9xUpdateAPUTimer();
if (SA1.Executing)
S9xSA1MainLoop ();
DO_HBLANK_CHECK();
}
Registers.PC = CPU.PC - CPU.PCBase;
S9xPackStatus ();
APURegisters.PC = IAPU.PC - IAPU.RAM;
S9xAPUPackStatus ();
if (CPU.Flags & SCAN_KEYS_FLAG)
{
#ifdef DEBUGGER
if (!(CPU.Flags & FRAME_ADVANCE_FLAG))
#endif
S9xSyncSpeed ();
CPU.Flags &= ~SCAN_KEYS_FLAG;
}
#ifdef DETECT_NASTY_FX_INTERLEAVE
if (CPU.BRKTriggered && Settings.SuperFX && !CPU.TriedInterleavedMode2)
{
CPU.TriedInterleavedMode2 = TRUE;
CPU.BRKTriggered = FALSE;
S9xDeinterleaveMode2 ();
}
#endif
}
void S9xMainLoop (void)
{
struct SCPUState *cpu = &CPU;
struct SICPU *icpu = &ICPU;
struct SIAPU *iapu = &IAPU;
struct SAPU *apu = &APU;
struct SRegisters *reg = &Registers;
struct SAPURegisters *areg = &APURegisters;
for (;;)
{
APU_EXECUTE ();
if (cpu->Flags)
{
if (cpu->Flags & NMI_FLAG)
{
if (--cpu->NMICycleCount == 0)
{
cpu->Flags &= ~NMI_FLAG;
if (cpu->WaitingForInterrupt)
{
cpu->WaitingForInterrupt = FALSE;
++cpu->PC;
}
S9xOpcode_NMI ();
}
}
#ifdef DEBUGGER
if ((cpu->Flags & BREAK_FLAG) &&
!(cpu->Flags & SINGLE_STEP_FLAG))
{
for (int Break = 0; Break != 6; Break++)
{
if (S9xBreakpoint[Break].Enabled &&
S9xBreakpoint[Break].Bank == Registers.PB &&
S9xBreakpoint[Break].Address == cpu->PC - cpu->PCBase)
{
if (S9xBreakpoint[Break].Enabled == 2)
S9xBreakpoint[Break].Enabled = TRUE;
else
cpu->Flags |= DEBUG_MODE_FLAG;
}
}
}
#endif
CHECK_SOUND ();
if (cpu->Flags & IRQ_PENDING_FLAG)
{
if (cpu->IRQCycleCount == 0)
{
if (cpu->WaitingForInterrupt)
{
cpu->WaitingForInterrupt = FALSE;
cpu->PC++;
}
if (cpu->IRQActive)
// if (cpu->IRQActive && !Settings.DisableIRQ)
{
if (!CHECKFLAG (IRQ))
S9xOpcode_IRQ ();
}
else
cpu->Flags &= ~IRQ_PENDING_FLAG;
}
else
cpu->IRQCycleCount--;
}
#ifdef DEBUGGER
if (cpu->Flags & DEBUG_MODE_FLAG)
break;
#endif
if (cpu->Flags & SCAN_KEYS_FLAG)
break;
#ifdef DEBUGGER
if (cpu->Flags & TRACE_FLAG)
S9xTrace ();
if (cpu->Flags & SINGLE_STEP_FLAG)
{
cpu->Flags &= ~SINGLE_STEP_FLAG;
cpu->Flags |= DEBUG_MODE_FLAG;
}
#endif
} //if (CPU.Flags)
#ifdef CPU_SHUTDOWN
cpu->PCAtOpcodeStart = cpu->PC;
#endif
#ifdef VAR_CYCLES
cpu->Cycles += cpu->MemSpeed;
#else
cpu->Cycles += icpu->Speed [*cpu->PC];
#endif
(*icpu->S9xOpcodes [*cpu->PC++].S9xOpcode) (reg, icpu, cpu);
#ifndef _ZAURUS
if (SA1.Executing)
S9xSA1MainLoop ();
#endif
DO_HBLANK_CHECK();
} // for(;;)
Registers.PC = cpu->PC - cpu->PCBase;
S9xPackStatus ();
areg->PC = iapu->PC - iapu->RAM;
S9xAPUPackStatus_OP ();
if (cpu->Flags & SCAN_KEYS_FLAG)
{
#ifdef DEBUGGER
if (!(cpu->Flags & FRAME_ADVANCE_FLAG))
#endif
S9xSyncSpeed ();
cpu->Flags &= ~SCAN_KEYS_FLAG;
}
#ifndef _ZAURUS
if (cpu->BRKTriggered && Settings.SuperFX && !cpu->TriedInterleavedMode2)
{
cpu->TriedInterleavedMode2 = TRUE;
cpu->BRKTriggered = FALSE;
S9xDeinterleaveMode2 ();
}
#endif
}
void S9xMainLoop (void)
{
if(ICPU.SavedAtOp)
{
ICPU.SavedAtOp = FALSE;
Registers.PCw = CPU.PBPCAtOpcodeStart;
if(CPU.PCBase)
CPU.Cycles -= CPU.MemSpeed;
goto doOp;
}
for (;;)
{
if (CPU.Flags)
{
if (CPU.Flags & NMI_FLAG)
{
if (Timings.NMITriggerPos <= CPU.Cycles)
{
CPU.Flags &= ~NMI_FLAG;
Timings.NMITriggerPos = 0xffff;
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
Registers.PCw++;
}
S9xOpcode_NMI();
}
}
#ifdef DEBUGGER
if ((CPU.Flags & BREAK_FLAG) && !(CPU.Flags & SINGLE_STEP_FLAG))
{
for (int Break = 0; Break != 6; Break++)
{
if (S9xBreakpoint[Break].Enabled &&
S9xBreakpoint[Break].Bank == Registers.PB &&
S9xBreakpoint[Break].Address == Registers.PCw)
{
if (S9xBreakpoint[Break].Enabled == 2)
S9xBreakpoint[Break].Enabled = TRUE;
else
CPU.Flags |= DEBUG_MODE_FLAG;
}
}
}
#endif
CHECK_SOUND();
if (CPU.Flags & IRQ_FLAG)
{
if (CPU.IRQPending)
// FIXME: In case of IRQ during WRAM refresh
CPU.IRQPending = 0;
else
{
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
Registers.PCw++;
}
if (CPU.IRQActive && !Settings.DisableIRQ)
{
if (!CheckFlag(IRQ))
// in IRQ handler $4211 is supposed to be read, so IRQ_FLAG should be cleared.
S9xOpcode_IRQ();
}
else
CPU.Flags &= ~IRQ_FLAG;
}
}
if (CPU.Flags & SCAN_KEYS_FLAG)
break;
#ifdef DEBUGGER
if (CPU.Flags & DEBUG_MODE_FLAG)
break;
if (CPU.Flags & TRACE_FLAG)
S9xTrace();
if (CPU.Flags & SINGLE_STEP_FLAG)
{
CPU.Flags &= ~SINGLE_STEP_FLAG;
CPU.Flags |= DEBUG_MODE_FLAG;
}
#endif
}
#ifdef CPU_SHUTDOWN
CPU.PBPCAtOpcodeStart = Registers.PBPC;
#endif
doOp:
register uint8 Op;
register struct SOpcodes *Opcodes;
CPU.PrevCycles = CPU.Cycles;
if (CPU.PCBase)
{
Op = CPU.PCBase[Registers.PCw];
CPU.Cycles += CPU.MemSpeed;
Opcodes = ICPU.S9xOpcodes;
}
else
{
Op = S9xGetByte(Registers.PBPC);
OpenBus = Op;
Opcodes = S9xOpcodesSlow;
}
if ((Registers.PCw&MEMMAP_MASK) + ICPU.S9xOpLengths[Op] >= MEMMAP_BLOCK_SIZE)
{
uint8 *oldPCBase = CPU.PCBase;
CPU.PCBase = GetBasePointer(ICPU.ShiftedPB + ((uint16) (Registers.PCw + 4)));
if (oldPCBase!=CPU.PCBase || (Registers.PCw&~MEMMAP_MASK) == (0xffff & ~MEMMAP_MASK))
Opcodes = S9xOpcodesSlow;
}
Registers.PCw++;
(*Opcodes[Op].S9xOpcode)();
if(ICPU.SavedAtOp)
{
ICPU.SavedAtOp = false;
continue;
}
S9xAPUExecute();
if (SA1.Executing)
S9xSA1MainLoop();
while (CPU.Cycles >= CPU.NextEvent)
S9xDoHEventProcessing();
}
S9xPackStatus();
APURegisters.PC = IAPU.PC - IAPU.RAM;
S9xAPUPackStatus();
if (CPU.Flags & SCAN_KEYS_FLAG)
{
#ifdef DEBUGGER
if (!(CPU.Flags & FRAME_ADVANCE_FLAG))
#endif
S9xSyncSpeed();
CPU.Flags &= ~SCAN_KEYS_FLAG;
}
}
void S9xMainLoop (struct SRegisters * reg, struct SICPU * icpu, struct SCPUState * cpu)
{
#else
void S9xMainLoop (void)
{
struct SICPU * icpu = &ICPU;
struct SCPUState * cpu = &CPU;
struct SRegisters * reg = &Registers;
#endif
for (;;)
{
APU_EXECUTE ();
if (CPU.Flags)
{
if (CPU.Flags & NMI_FLAG)
{
if (--CPU.NMICycleCount == 0)
{
CPU.Flags &= ~NMI_FLAG;
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
++CPU.PC;
}
S9xOpcode_NMI ();
}
}
#ifdef DEBUGGER
if ((CPU.Flags & BREAK_FLAG) &&
!(CPU.Flags & SINGLE_STEP_FLAG))
{
for (int Break = 0; Break != 6; Break++)
{
if (S9xBreakpoint[Break].Enabled &&
S9xBreakpoint[Break].Bank == Registers.PB &&
S9xBreakpoint[Break].Address == CPU.PC - CPU.PCBase)
{
if (S9xBreakpoint[Break].Enabled == 2)
S9xBreakpoint[Break].Enabled = TRUE;
else
CPU.Flags |= DEBUG_MODE_FLAG;
}
}
}
#endif
CHECK_SOUND ();
if (CPU.Flags & IRQ_PENDING_FLAG)
{
if (CPU.IRQCycleCount == 0)
{
if (CPU.WaitingForInterrupt)
{
CPU.WaitingForInterrupt = FALSE;
CPU.PC++;
}
if (CPU.IRQActive && !Settings.DisableIRQ)
{
if (!CHECKFLAG (IRQ))
S9xOpcode_IRQ ();
}
else
CPU.Flags &= ~IRQ_PENDING_FLAG;
}
else
CPU.IRQCycleCount--;
}
#ifdef DEBUGGER
if (CPU.Flags & DEBUG_MODE_FLAG)
break;
#endif
if (CPU.Flags & SCAN_KEYS_FLAG)
break;
#ifdef DEBUGGER
if (CPU.Flags & TRACE_FLAG)
S9xTrace ();
if (CPU.Flags & SINGLE_STEP_FLAG)
{
CPU.Flags &= ~SINGLE_STEP_FLAG;
CPU.Flags |= DEBUG_MODE_FLAG;
}
#endif
} //if (CPU.Flags)
#ifdef CPU_SHUTDOWN
CPU.PCAtOpcodeStart = CPU.PC;
#endif
#ifdef VAR_CYCLES
CPU.Cycles += CPU.MemSpeed;
#else
CPU.Cycles += ICPU.Speed [*CPU.PC];
#endif
(*ICPU.S9xOpcodes [*CPU.PC++].S9xOpcode) (&Registers, &ICPU, &CPU);
if (SA1.Executing)
S9xSA1MainLoop ();
DO_HBLANK_CHECK();
} // for(;;)
Registers.PC = CPU.PC - CPU.PCBase;
S9xPackStatus ();
APURegisters.PC = IAPU.PC - IAPU.RAM;
S9xAPUPackStatus ();
if (CPU.Flags & SCAN_KEYS_FLAG)
{
#ifdef DEBUGGER
if (!(CPU.Flags & FRAME_ADVANCE_FLAG))
#endif
S9xSyncSpeed ();
CPU.Flags &= ~SCAN_KEYS_FLAG;
}
if (CPU.BRKTriggered && Settings.SuperFX && !CPU.TriedInterleavedMode2)
{
CPU.TriedInterleavedMode2 = TRUE;
CPU.BRKTriggered = FALSE;
S9xDeinterleaveMode2 ();
}
}
void S9xSetIRQ (uint32 source)
{
CPU.IRQActive |= source;
CPU.Flags |= IRQ_PENDING_FLAG;
CPU.IRQCycleCount = 3;
if (CPU.WaitingForInterrupt)
{
// Force IRQ to trigger immediately after WAI -
// Final Fantasy Mystic Quest crashes without this.
CPU.IRQCycleCount = 0;
CPU.WaitingForInterrupt = FALSE;
CPU.PC++;
}
}