static int ReadOrigSnapshot(STREAM snap)
{
char buffer [_MAX_PATH];
char rom_filename [_MAX_PATH];
int result;
int i;
int j;
int version;
int len = strlen(ORIG_SNAPSHOT_MAGIC) + 1 + 4 + 1;
if (READ_STREAM(buffer, len, snap) != len)
return (WRONG_FORMAT);
if (strncmp(buffer, ORIG_SNAPSHOT_MAGIC, strlen(ORIG_SNAPSHOT_MAGIC)) != 0)
return (WRONG_FORMAT);
if ((version = atoi(&buffer [strlen(SNAPSHOT_MAGIC) + 1])) > ORIG_SNAPSHOT_VERSION)
return (WRONG_VERSION);
if ((result = ReadBlock("NAM:", rom_filename, _MAX_PATH, snap)) != SUCCESS)
return (result);
if ((result = ReadBlock("HiR:", buffer, 0x41, snap)) != SUCCESS)
return (result);
if (strcasecmp(rom_filename, Memory.ROMFilename) != 0 &&
strcasecmp(S9xBasename(rom_filename), S9xBasename(Memory.ROMFilename)) != 0)
{
S9xMessage(S9X_WARNING, S9X_FREEZE_ROM_NAME,
"Current loaded ROM image doesn't match that required by freeze-game file.");
}
S9xReset();
S9xSetSoundMute(TRUE);
if ((result = ReadBlock("CPU:", &OrigCPU, sizeof(OrigCPU), snap)) != SUCCESS)
return (result);
OrigCPU.FastROMSpeed = OrigCPU.FastROMSpeed_old;
Memory.FixROMSpeed();
if (version == 3)
{
OrigCPU.Cycles = OrigCPU.Cycles_old;
OrigCPU.NextEvent = OrigCPU.NextEvent_old;
OrigCPU.V_Counter = OrigCPU.V_Counter_old;
OrigCPU.MemSpeed = OrigCPU.MemSpeed_old;
OrigCPU.MemSpeedx2 = OrigCPU.MemSpeedx2_old;
OrigCPU.FastROMSpeed = OrigCPU.FastROMSpeed_old;
}
CPU.Flags = OrigCPU.Flags;
CPU.BranchSkip = OrigCPU.BranchSkip;
CPU.NMIActive = OrigCPU.NMIActive;
CPU.IRQActive = OrigCPU.IRQActive;
CPU.WaitingForInterrupt = OrigCPU.WaitingForInterrupt;
CPU.WhichEvent = OrigCPU.WhichEvent;
CPU.Cycles = OrigCPU.Cycles;
CPU.NextEvent = OrigCPU.NextEvent;
CPU.V_Counter = OrigCPU.V_Counter;
CPU.MemSpeed = OrigCPU.MemSpeed;
CPU.MemSpeedx2 = OrigCPU.MemSpeedx2;
CPU.FastROMSpeed = OrigCPU.FastROMSpeed;
if ((result = ReadBlock("REG:", &OrigRegisters, sizeof(OrigRegisters), snap)) != SUCCESS)
return (result);
Registers = *(struct SRegisters*) &OrigRegisters;
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 + IAPU.PC;
S9xAPUUnpackStatus();
if (APUCheckDirectPage())
IAPU.DirectPage = IAPU.RAM + 0x100;
else
IAPU.DirectPage = IAPU.RAM;
Settings.APUEnabled = TRUE;
CPU.APU_APUExecuting = TRUE;
}
else
{
Settings.APUEnabled = FALSE;
CPU.APU_APUExecuting = FALSE;
S9xSetSoundMute(TRUE);
}
S9xFixSoundAfterSnapshotLoad();
ICPU.ShiftedPB = Registers.PB << 16;
ICPU.ShiftedDB = Registers.DB << 16;
S9xSetPCBase(ICPU.ShiftedPB + Registers.PC, &CPU);
S9xUnpackStatus();
S9xFixCycles(&Registers, &ICPU);
S9xReschedule();
return (SUCCESS);
}
void S9xSoftResetCPU ()
{
Registers.PBPC = 0;
Registers.PB = 0;
Registers.PCw = S9xGetWord (0xFFFC);
OpenBus = Registers.PCh;
Registers.D.W = 0;
Registers.DB = 0;
Registers.SH = 1;
Registers.SL -= 3;
Registers.XH = 0;
Registers.YH = 0;
ICPU.ShiftedPB = 0;
ICPU.ShiftedDB = 0;
SetFlags (MemoryFlag | IndexFlag | IRQ | Emulation);
ClearFlags (Decimal);
CPU.Flags = CPU.Flags & (DEBUG_MODE_FLAG | TRACE_FLAG);
CPU.BranchSkip = FALSE;
CPU.NMIActive = FALSE;
CPU.IRQActive = FALSE;
CPU.WaitingForInterrupt = FALSE;
CPU.InDMA = FALSE;
CPU.InHDMA = FALSE;
CPU.InDMAorHDMA = FALSE;
CPU.InWRAMDMAorHDMA = FALSE;
CPU.HDMARanInDMA = 0;
CPU.PCBase = NULL;
CPU.PBPCAtOpcodeStart = 0xffffffff;
CPU.WaitAddress = 0xffffffff;
CPU.WaitCounter = 0;
CPU.Cycles = 182; // Or 188. This is the cycle count just after the jump to the Reset Vector.
CPU.PrevCycles = -1;
CPU.V_Counter = 0;
CPU.MemSpeed = SLOW_ONE_CYCLE;
CPU.MemSpeedx2 = SLOW_ONE_CYCLE * 2;
CPU.FastROMSpeed = SLOW_ONE_CYCLE;
CPU.AutoSaveTimer = 0;
CPU.SRAMModified = FALSE;
CPU.BRKTriggered = FALSE;
CPU.IRQPending = 0;
Timings.InterlaceField = FALSE;
Timings.H_Max = Timings.H_Max_Master;
Timings.V_Max = Timings.V_Max_Master;
Timings.NMITriggerPos = 0xffff;
if (Model->_5A22 == 2)
Timings.WRAMRefreshPos = SNES_WRAM_REFRESH_HC_v2;
else
Timings.WRAMRefreshPos = SNES_WRAM_REFRESH_HC_v1;
CPU.WhichEvent = HC_RENDER_EVENT;
CPU.NextEvent = Timings.RenderPos;
S9xSetPCBase (Registers.PBPC);
ICPU.S9xOpcodes = S9xOpcodesE1;
ICPU.S9xOpLengths = S9xOpLengthsM1X1;
ICPU.CPUExecuting = TRUE;
S9xUnpackStatus();
}
