static void SPCPlayDefrost(void)
{
uint16 savedswitch;
short i;
savedswitch = so.stereo_switch;
S9xResetAPU();
S9xSetSoundMute(true);
memcpy(&APU, StoredAPU, sizeof(SAPU));
memcpy(&APURegisters, StoredAPURegisters, sizeof(SAPURegisters));
memcpy(&SoundData, StoredSoundData, sizeof(SSoundData));
memcpy(IAPU.RAM, StoredIAPURAM, 0x10000);
if (!mbxFinished)
{
for (i = 0; i < 4; i++)
APU.OutPorts[i] = IAPU.RAM[0xf4 + i];
for (i = 0; i < 3; i++)
{
if (IAPU.RAM[0xfa + i] == 0)
APU.TimerTarget[i] = 0x100;
else
APU.TimerTarget[i] = IAPU.RAM[0xfa + i];
}
S9xSetAPUControl(IAPU.RAM[0xf1] & 0xcf); // Don't reset I/O ports
}
S9xSetSoundMute(false);
IAPU.PC = IAPU.RAM + APURegisters.PC;
S9xAPUUnpackStatus();
if (APUCheckDirectPage())
IAPU.DirectPage = IAPU.RAM + 0x100;
else
IAPU.DirectPage = IAPU.RAM;
IAPU.APUExecuting = true;
IAPU.NextAPUTimerPos = oldNextAPUTimerPos;
IAPU.APUTimerCounter = oldAPUTimerCounter;
CPU.Cycles = oldCPUCycles;
S9xFixSoundAfterSnapshotLoad(SNAPSHOT_VERSION);
so.stereo_switch = savedswitch;
}
void S9xAPUSetByte(uint8 val, uint32 Address) {
Address &= 0xffff;
if (Address <= 0xff && Address >= 0xf0) {
if (Address == 0xf3)
S9xSetAPUDSP(val);
else
if (Address >= 0xf4 && Address <= 0xf7)
APU.OutPorts [Address - 0xf4] = val;
else
if (Address == 0xf1)
S9xSetAPUControl(val);
else
if (Address < 0xfd) {
IAPU.RAM [Address] = val;
if (Address >= 0xfa) {
if (val == 0)
APU.TimerTarget [Address - 0xfa] = 0x100;
else
APU.TimerTarget [Address - 0xfa] = val;
}
}
} else {
#if 0
if (Address >= 0x2500 && Address <= 0x2504)
printf("%06d %04x <- %02x\n", ICPU.Scanline, Address, val);
if (Address == 0x26c6) {
extern FILE *apu_trace;
extern FILE *trace;
APU.Flags |= TRACE_FLAG;
CPU.Flags |= TRACE_FLAG;
if (apu_trace == NULL)
apu_trace = fopen("aputrace.log", "wb");
if (trace == NULL)
trace = fopen("trace.log", "wb");
printf("TRACING SWITCHED ON\n");
}
#endif
if (Address < 0xffc0)
IAPU.RAM [Address] = val;
else {
APU.ExtraRAM [Address - 0xffc0] = val;
if (!APU.ShowROM)
IAPU.RAM [Address] = val;
}
}
}
void S9xAPUSetByteZ(uint8 val, uint8 Address) {
if (Address >= 0xf0 && IAPU.DirectPage == IAPU.RAM) {
if (Address == 0xf3)
S9xSetAPUDSP(val);
else
if (Address >= 0xf4 && Address <= 0xf7)
APU.OutPorts [Address - 0xf4] = val;
else
if (Address == 0xf1)
S9xSetAPUControl(val);
else
if (Address < 0xfd) {
IAPU.RAM [Address] = val;
if (Address >= 0xfa) {
if (val == 0)
APU.TimerTarget [Address - 0xfa] = 0x100;
else
APU.TimerTarget [Address - 0xfa] = val;
}
}
} else
IAPU.DirectPage [Address] = val;
}
/* Restore SPC state
---------------------------------------------------------------- */
static void RestoreSPC()
{
int i;
APURegisters.PC = BackupAPURegisters.PC;
APURegisters.YA.B.A = BackupAPURegisters.YA.B.A;
APURegisters.X = BackupAPURegisters.X;
APURegisters.YA.B.Y = BackupAPURegisters.YA.B.Y;
APURegisters.P = BackupAPURegisters.P;
APURegisters.S = BackupAPURegisters.S;
memcpy (IAPU.RAM, BackupAPURAM, 65536);
memcpy (APU.ExtraRAM, BackupAPUExtraRAM, 64);
memcpy (APU.DSP, BackupDSPRAM, 128);
for (i = 0; i < 4; i ++)
{
APU.OutPorts[i] = IAPU.RAM[0xf4 + i];
}
IAPU.TimerErrorCounter = 0;
for (i = 0; i < 3; i ++)
{
if (IAPU.RAM[0xfa + i] == 0)
APU.TimerTarget[i] = 0x100;
else
APU.TimerTarget[i] = IAPU.RAM[0xfa + i];
}
S9xSetAPUControl (IAPU.RAM[0xf1]);
/* from snaporig.cpp (ReadOrigSnapshot) */
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;
S9xFixSoundAfterSnapshotLoad ();
S9xSetFrequencyModulationEnable (APU.DSP[APU_PMON]);
S9xSetMasterVolume (APU.DSP[APU_MVOL_LEFT], APU.DSP[APU_MVOL_RIGHT]);
S9xSetEchoVolume (APU.DSP[APU_EVOL_LEFT], APU.DSP[APU_EVOL_RIGHT]);
uint8 mask = 1;
int type;
for (i = 0; i < 8; i++, mask <<= 1) {
// unused // Channel *ch = &SoundData.channels[i];
S9xFixEnvelope (i,
APU.DSP[APU_GAIN + (i << 4)],
APU.DSP[APU_ADSR1 + (i << 4)],
APU.DSP[APU_ADSR2 + (i << 4)]);
S9xSetSoundVolume (i,
APU.DSP[APU_VOL_LEFT + (i << 4)],
APU.DSP[APU_VOL_RIGHT + (i << 4)]);
S9xSetSoundFrequency (i, ((APU.DSP[APU_P_LOW + (i << 4)]
+ (APU.DSP[APU_P_HIGH + (i << 4)] << 8))
& FREQUENCY_MASK) * 8);
if (APU.DSP [APU_NON] & mask)
type = SOUND_NOISE;
else
type = SOUND_SAMPLE;
S9xSetSoundType (i, type);
if ((APU.DSP[APU_KON] & mask) != 0)
{
APU.KeyedChannels |= mask;
S9xPlaySample (i);
}
}
#if 0
unsigned char temp=IAPU.RAM[0xf2];
for(i=0;i<128;i++){
IAPU.RAM[0xf2]=i;
S9xSetAPUDSP(APU.DSP[i]);
}
IAPU.RAM[0xf2]=temp;
#endif
}