Beispiel #1
0
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;
    }
}
Beispiel #2
0
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
}
Beispiel #3
0
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
}
Beispiel #4
0
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++;
    }
}