snaporig.cpp

SFC游戏模拟器 snes9x 1.43 的原代码

    if ((result = ReadBlock ("PPU:", &OrigPPU, sizeof (OrigPPU), snap)) != SUCCESS)
	return (result);

    if (version == 2)
    {
	OrigPPU.OBJNameSelect = OrigPPU.OBJNameSelect_old << 13;
	OrigPPU.OBJNameBase <<= 1;
	OrigPPU.OBJNameSelect <<= 13;
    }
    PPU.BGMode = OrigPPU.BGMode;
    PPU.BG3Priority = OrigPPU.BG3Priority;
    PPU.Brightness = OrigPPU.Brightness;

    PPU.VMA.High = OrigPPU.VMA.High;
    PPU.VMA.Increment = OrigPPU.VMA.Increment;
    PPU.VMA.Address = OrigPPU.VMA.Address;
    PPU.VMA.Mask1 = OrigPPU.VMA.Mask1;
    PPU.VMA.FullGraphicCount = OrigPPU.VMA.FullGraphicCount;
    PPU.VMA.Shift = OrigPPU.VMA.Shift;

    for (i = 0; i < 4; i++)
    {
	PPU.BG[i].SCBase = OrigPPU.BG[i].SCBase;
	PPU.BG[i].VOffset = OrigPPU.BG[i].VOffset;
	PPU.BG[i].HOffset = OrigPPU.BG[i].HOffset;
	PPU.BG[i].BGSize = OrigPPU.BG[i].BGSize;
	PPU.BG[i].NameBase = OrigPPU.BG[i].NameBase;
	PPU.BG[i].SCSize = OrigPPU.BG[i].SCSize;
    }

    PPU.CGFLIP = OrigPPU.CGFLIP;
    for (i = 0; i < 256; i++)
	PPU.CGDATA [i] = OrigPPU.CGDATA [i];
    PPU.FirstSprite = OrigPPU.FirstSprite;
    for (i = 0; i < 128; i++)
    {
	PPU.OBJ[i].HPos = OrigPPU.OBJ [i].HPos;
	PPU.OBJ[i].VPos = OrigPPU.OBJ [i].VPos;
	PPU.OBJ[i].Name = OrigPPU.OBJ [i].Name;
	PPU.OBJ[i].VFlip = OrigPPU.OBJ [i].VFlip;
	PPU.OBJ[i].HFlip = OrigPPU.OBJ [i].HFlip;
	PPU.OBJ[i].Priority = OrigPPU.OBJ [i].Priority;
	PPU.OBJ[i].Palette = OrigPPU.OBJ [i].Palette;
	PPU.OBJ[i].Size = OrigPPU.OBJ [i].Size;
    }
    PPU.OAMPriorityRotation = OrigPPU.OAMPriorityRotation;
    PPU.OAMAddr = OrigPPU.OAMAddr;

    PPU.OAMFlip = OrigPPU.OAMFlip;
    PPU.OAMTileAddress = OrigPPU.OAMTileAddress;
    PPU.IRQVBeamPos = OrigPPU.IRQVBeamPos;
    PPU.IRQHBeamPos = OrigPPU.IRQHBeamPos;
    PPU.VBeamPosLatched = OrigPPU.VBeamPosLatched;
    PPU.HBeamPosLatched = OrigPPU.HBeamPosLatched;

    PPU.HBeamFlip = OrigPPU.HBeamFlip;
    PPU.VBeamFlip = OrigPPU.VBeamFlip;
    PPU.HVBeamCounterLatched = OrigPPU.HVBeamCounterLatched;

    PPU.MatrixA = OrigPPU.MatrixA;
    PPU.MatrixB = OrigPPU.MatrixB;
    PPU.MatrixC = OrigPPU.MatrixC;
    PPU.MatrixD = OrigPPU.MatrixD;
    PPU.CentreX = OrigPPU.CentreX;
    PPU.CentreY = OrigPPU.CentreY;
    PPU.Joypad1ButtonReadPos = OrigPPU.Joypad1ButtonReadPos;
    PPU.Joypad2ButtonReadPos = OrigPPU.Joypad2ButtonReadPos;
    PPU.Joypad3ButtonReadPos = OrigPPU.Joypad3ButtonReadPos;

    PPU.CGADD = OrigPPU.CGADD;
    PPU.FixedColourRed = OrigPPU.FixedColourRed;
    PPU.FixedColourGreen = OrigPPU.FixedColourGreen;
    PPU.FixedColourBlue = OrigPPU.FixedColourBlue;
    PPU.SavedOAMAddr = OrigPPU.SavedOAMAddr;
    PPU.ScreenHeight = OrigPPU.ScreenHeight;
    PPU.WRAM = OrigPPU.WRAM;
    PPU.ForcedBlanking = OrigPPU.ForcedBlanking;
    PPU.OBJNameSelect = OrigPPU.OBJNameSelect;
    PPU.OBJSizeSelect = OrigPPU.OBJSizeSelect;
    PPU.OBJNameBase = OrigPPU.OBJNameBase;
    PPU.OAMReadFlip = OrigPPU.OAMReadFlip;
    memmove (PPU.OAMData, OrigPPU.OAMData, sizeof (PPU.OAMData));
    PPU.VTimerEnabled = OrigPPU.VTimerEnabled;
    PPU.HTimerEnabled = OrigPPU.HTimerEnabled;
    PPU.HTimerPosition = OrigPPU.HTimerPosition;
    PPU.Mosaic = OrigPPU.Mosaic;
    memmove (PPU.BGMosaic, OrigPPU.BGMosaic, sizeof (PPU.BGMosaic));
    PPU.Mode7HFlip = OrigPPU.Mode7HFlip;
    PPU.Mode7VFlip = OrigPPU.Mode7VFlip;
    PPU.Mode7Repeat = OrigPPU.Mode7Repeat;
    PPU.Window1Left = OrigPPU.Window1Left;
    PPU.Window1Right = OrigPPU.Window1Right;
    PPU.Window2Left = OrigPPU.Window2Left;
    PPU.Window2Right = OrigPPU.Window2Right;
    for (i = 0; i < 6; i++)
    {
	PPU.ClipWindowOverlapLogic [i] = OrigPPU.ClipWindowOverlapLogic [i];
	PPU.ClipWindow1Enable [i] = OrigPPU.ClipWindow1Enable [i];
	PPU.ClipWindow2Enable [i] = OrigPPU.ClipWindow2Enable [i];
	PPU.ClipWindow1Inside [i] = OrigPPU.ClipWindow1Inside [i];
	PPU.ClipWindow2Inside [i] = OrigPPU.ClipWindow2Inside [i];
    }
    PPU.CGFLIPRead = OrigPPU.CGFLIPRead;
    PPU.Need16x8Mulitply = OrigPPU.Need16x8Mulitply;

    IPPU.ColorsChanged = TRUE;
    IPPU.OBJChanged = TRUE;
    S9xFixColourBrightness ();
    IPPU.RenderThisFrame = FALSE;

    if ((result = ReadBlock ("DMA:", OrigDMA, sizeof (OrigDMA), snap)) != SUCCESS)
	return (result);

    for (i = 0; i < 8; i++)
    {
	DMA[i].TransferDirection = OrigDMA[i].TransferDirection;
	DMA[i].AAddressFixed = OrigDMA[i].AAddressFixed;
	DMA[i].AAddressDecrement = OrigDMA[i].AAddressDecrement;
	DMA[i].TransferMode = OrigDMA[i].TransferMode;
	DMA[i].ABank = OrigDMA[i].ABank;
	DMA[i].AAddress = OrigDMA[i].AAddress;
	DMA[i].Address = OrigDMA[i].Address;
	DMA[i].BAddress = OrigDMA[i].BAddress;
	DMA[i].TransferBytes = OrigDMA[i].TransferBytes;
	DMA[i].HDMAIndirectAddressing = OrigDMA[i].HDMAIndirectAddressing;
	DMA[i].IndirectAddress = OrigDMA[i].IndirectAddress;
	DMA[i].IndirectBank = OrigDMA[i].IndirectBank;
	DMA[i].Repeat = OrigDMA[i].Repeat;
	DMA[i].LineCount = OrigDMA[i].LineCount;
	DMA[i].FirstLine = OrigDMA[i].FirstLine;
    }

    if ((result = ReadBlock ("VRA:", Memory.VRAM, 0x10000, snap)) != SUCCESS)
	return (result);
    if ((result = ReadBlock ("RAM:", Memory.RAM, 0x20000, snap)) != SUCCESS)
	return (result);
    if ((result = ReadBlock ("SRA:", ::SRAM, 0x10000, snap)) != SUCCESS)
	return (result);
    if ((result = ReadBlock ("FIL:", Memory.FillRAM, 0x8000, snap)) != SUCCESS)
	return (result);
    if (ReadBlock ("APU:", &OrigAPU, sizeof (OrigAPU), snap) == SUCCESS)
    {
	APU = *(struct SAPU *) &OrigAPU;

	if ((result = ReadBlock ("ARE:", &OrigAPURegisters,
				 sizeof (OrigAPURegisters), snap)) != SUCCESS)
	    return (result);
	APURegisters = *(struct SAPURegisters *) &OrigAPURegisters;
	if ((result = ReadBlock ("ARA:", IAPU.RAM, 0x10000, snap)) != SUCCESS)
	    return (result);
	if ((result = ReadBlock ("SOU:", &OrigSoundData,
				 sizeof (SOrigSoundData), snap)) != SUCCESS)
	    return (result);

	SoundData.master_volume_left = OrigSoundData.master_volume_left;
	SoundData.master_volume_right = OrigSoundData.master_volume_right;
	SoundData.echo_volume_left = OrigSoundData.echo_volume_left;
	SoundData.echo_volume_right = OrigSoundData.echo_volume_right; 
	SoundData.echo_enable = OrigSoundData.echo_enable;
	SoundData.echo_feedback = OrigSoundData.echo_feedback;
	SoundData.echo_ptr = OrigSoundData.echo_ptr;
	SoundData.echo_buffer_size = OrigSoundData.echo_buffer_size;
	SoundData.echo_write_enabled = OrigSoundData.echo_write_enabled;
	SoundData.echo_channel_enable = OrigSoundData.echo_channel_enable;
	SoundData.pitch_mod = OrigSoundData.pitch_mod;

	for (i = 0; i < 3; i++)
	    SoundData.dummy [i] = OrigSoundData.dummy [i];
	for (i = 0; i < NUM_CHANNELS; i++)
	{
	    SoundData.channels [i].state = OrigSoundData.channels [i].state;
	    SoundData.channels [i].type = OrigSoundData.channels [i].type;
	    SoundData.channels [i].volume_left = OrigSoundData.channels [i].volume_left;
	    SoundData.channels [i].volume_right = OrigSoundData.channels [i].volume_right;
	    SoundData.channels [i].hertz = OrigSoundData.channels [i].frequency;
	    SoundData.channels [i].count = OrigSoundData.channels [i].count;
	    SoundData.channels [i].loop = OrigSoundData.channels [i].loop;
	    SoundData.channels [i].envx = OrigSoundData.channels [i].envx;
	    SoundData.channels [i].left_vol_level = OrigSoundData.channels [i].left_vol_level;
	    SoundData.channels [i].right_vol_level = OrigSoundData.channels [i].right_vol_level;
	    SoundData.channels [i].envx_target = OrigSoundData.channels [i].envx_target;
	    SoundData.channels [i].env_error = OrigSoundData.channels [i].env_error;
	    SoundData.channels [i].erate = OrigSoundData.channels [i].erate;
	    SoundData.channels [i].direction = OrigSoundData.channels [i].direction;
	    SoundData.channels [i].attack_rate = OrigSoundData.channels [i].attack_rate;
	    SoundData.channels [i].decay_rate = OrigSoundData.channels [i].decay_rate;
	    SoundData.channels [i].sustain_rate = OrigSoundData.channels [i].sustain_rate;
	    SoundData.channels [i].release_rate = OrigSoundData.channels [i].release_rate;
	    SoundData.channels [i].sustain_level = OrigSoundData.channels [i].sustain_level;
	    SoundData.channels [i].sample = OrigSoundData.channels [i].sample;
	    for (j = 0; j < 16; j++)
		SoundData.channels [i].decoded [j] = OrigSoundData.channels [i].decoded [j];

	    for (j = 0; j < 2; j++)
		SoundData.channels [i].previous [j] = OrigSoundData.channels [i].previous [j];

	    SoundData.channels [i].sample_number = OrigSoundData.channels [i].sample_number;
	    SoundData.channels [i].last_block = OrigSoundData.channels [i].last_block;
	    SoundData.channels [i].needs_decode = OrigSoundData.channels [i].needs_decode;
	    SoundData.channels [i].block_pointer = OrigSoundData.channels [i].block_pointer;
	    SoundData.channels [i].sample_pointer = OrigSoundData.channels [i].sample_pointer;
	    SoundData.channels [i].mode = OrigSoundData.channels [i].mode;
	}

	S9xSetSoundMute (FALSE);
	IAPU.PC = IAPU.RAM + APURegisters.PC;
	S9xAPUUnpackStatus ();
	if (APUCheckDirectPage ())
	    IAPU.DirectPage = IAPU.RAM + 0x100;
	else
	    IAPU.DirectPage = IAPU.RAM;
	Settings.APUEnabled = TRUE;
	IAPU.APUExecuting = TRUE;
    }
    else
    {
	Settings.APUEnabled = FALSE;
	IAPU.APUExecuting = FALSE;
	S9xSetSoundMute (TRUE);
    }
    S9xFixSoundAfterSnapshotLoad ();
    ICPU.ShiftedPB = Registers.PB << 16;
    ICPU.ShiftedDB = Registers.DB << 16;
    S9xSetPCBase (ICPU.ShiftedPB + Registers.PC);
    S9xUnpackStatus ();
    S9xFixCycles ();
    S9xReschedule ();

    return (SUCCESS);
}