static inline
void _psxRcntWcount( u32 index, u32 value )
{
if( value > 0xffff )
{
verboseLog( 1, "[RCNT %i] wcount > 0xffff: %x\n", index, value );
value &= 0xffff;
}
rcnts[index].cycleStart = psxRegs.cycle;
rcnts[index].cycleStart -= value * rcnts[index].rate;
// TODO: <=.
if( value < rcnts[index].target )
{
rcnts[index].cycle = rcnts[index].target * rcnts[index].rate;
rcnts[index].counterState = CountToTarget;
}
else
{
rcnts[index].cycle = 0xffff * rcnts[index].rate;
rcnts[index].counterState = CountToOverflow;
}
verboseLog( 5, "[RCNT %i] scount: %x\n", index, value );
}
static
void psxRcntReset( u32 index )
{
u32 count;
if( rcnts[index].counterState == CountToTarget )
{
if( rcnts[index].mode & RcCountToTarget )
{
count = psxRegs.cycle;
count -= rcnts[index].cycleStart;
count /= rcnts[index].rate;
count -= rcnts[index].target;
}
else
{
count = _psxRcntRcount( index );
}
_psxRcntWcount( index, count );
if( rcnts[index].mode & RcIrqOnTarget )
{
if( (rcnts[index].mode & RcIrqRegenerate) || (!rcnts[index].irqState) )
{
verboseLog( 3, "[RCNT %i] irq: %x\n", index, count );
setIrq( rcnts[index].irq );
rcnts[index].irqState = 1;
}
}
rcnts[index].mode |= RcCountEqTarget;
}
else if( rcnts[index].counterState == CountToOverflow )
{
count = psxRegs.cycle;
count -= rcnts[index].cycleStart;
count /= rcnts[index].rate;
count -= 0xffff;
_psxRcntWcount( index, count );
if( rcnts[index].mode & RcIrqOnOverflow )
{
if( (rcnts[index].mode & RcIrqRegenerate) || (!rcnts[index].irqState) )
{
verboseLog( 3, "[RCNT %i] irq: %x\n", index, count );
setIrq( rcnts[index].irq );
rcnts[index].irqState = 1;
}
}
rcnts[index].mode |= RcOverflow;
}
rcnts[index].mode |= RcUnknown10;
psxRcntSet();
}
void psxRcntWcount( u32 index, u32 value )
{
verboseLog( 2, "[RCNT %i] wcount: %x\n", index, value );
psxRcntUpdate();
_psxRcntWcount( index, value );
psxRcntSet();
}
void psxRcntWtarget( u32 index, u32 value )
{
verboseLog( 1, "[RCNT %i] wtarget: %x\n", index, value );
psxRcntUpdate();
rcnts[index].target = value;
_psxRcntWcount( index, _psxRcntRcount( index ) );
psxRcntSet();
}
void psxRcntWmode( u32 index, u32 value )
{
verboseLog( 1, "[RCNT %i] wmode: %x\n", index, value );
psxRcntUpdate();
rcnts[index].mode = value;
rcnts[index].irqState = 0;
switch( index )
{
case 0:
if( value & Rc0PixelClock )
{
rcnts[index].rate = 5;
}
else
{
rcnts[index].rate = 1;
}
break;
case 1:
if( value & Rc1HSyncClock )
{
rcnts[index].rate = (PSXCLK / (FrameRate[Config.PsxType] * HSyncTotal[Config.PsxType]));
}
else
{
rcnts[index].rate = 1;
}
break;
case 2:
if( value & Rc2OneEighthClock )
{
rcnts[index].rate = 8;
}
else
{
rcnts[index].rate = 1;
}
// TODO: wcount must work.
if( value & Rc2Disable )
{
rcnts[index].rate = 0xffffffff;
}
break;
}
_psxRcntWcount( index, 0 );
psxRcntSet();
}
u32 psxRcntRmode( u32 index )
{
u16 mode;
psxRcntUpdate();
mode = rcnts[index].mode;
rcnts[index].mode &= 0xe7ff;
verboseLog( 2, "[RCNT %i] rmode: %x\n", index, mode );
return mode;
}
u32 psxRcntRcount( u32 index )
{
u32 count;
psxRcntUpdate();
count = _psxRcntRcount( index );
// Parasite Eve 2 fix - artificial clock jitter based on BIAS
// TODO: any other games depend on getting excepted value from RCNT?
if( Config.HackFix && index == 2 && rcnts[index].counterState == CountToTarget && (Config.RCntFix || ((rcnts[index].mode & 0x2FF) == JITTER_FLAGS)) )
{
/*
*The problem is that...
*
*We generate too many cycles during PSX HW hardware operations.
*
*OR
*
*We simply count too many cycles here for RCNTs.
*
*OR
*
*RCNT implementation here is only 99% compatible. Assumed this since easities to fix (only PE2 known to be affected).
*/
static u32 clast = 0xffff;
static u32 cylast = 0;
u32 count1 = count;
count /= BIAS;
verboseLog( 4, "[RCNT %i] rcountpe2: %x %x %x (%u)\n", index, count, count1, clast, (psxRegs.cycle-cylast));
cylast=psxRegs.cycle;
clast=count;
}
verboseLog( 2, "[RCNT %i] rcount: %x\n", index, count );
return count;
}
static inline
u32 _psxRcntRcount( u32 index )
{
u32 count = psxRegs.cycle;
count -= rcnts[index].cycleStart;
if (rcnts[index].rate > 1)
count /= rcnts[index].rate;
#ifdef DEBUG
if( count > 0x10000 )
verboseLog( 1, "[RCNT %i] rcount > 0x10000: %x\n", index, count );
#endif
count &= 0xffff;
return count;
}
static inline
u32 _psxRcntRcount( u32 index )
{
u32 count;
count = psxRegs.cycle;
count -= rcnts[index].cycleStart;
count /= rcnts[index].rate;
if( count > 0xffff )
{
verboseLog( 1, "[RCNT %i] rcount > 0xffff: %x\n", index, count );
count &= 0xffff;
}
return count;
}
u32 psxRcntRcount( u32 index )
{
u32 count;
psxRcntUpdate();
count = _psxRcntRcount( index );
// Parasite Eve 2 fix.
if( Config.RCntFix )
{
if( index == 2 )
{
if( rcnts[index].counterState == CountToTarget )
{
count /= BIAS;
}
}
}
verboseLog( 2, "[RCNT %i] rcount: %x\n", index, count );
return count;
}
u32 psxRcntRtarget( u32 index )
{
verboseLog( 2, "[RCNT %i] rtarget: %x\n", index, rcnts[index].target );
return rcnts[index].target;
}
static
void psxRcntReset( u32 index )
{
u32 rcycles;
rcnts[index].mode |= RcUnknown10;
if( rcnts[index].counterState == CountToTarget )
{
rcycles = psxRegs.cycle - rcnts[index].cycleStart;
if( rcnts[index].mode & RcCountToTarget )
{
rcycles -= rcnts[index].target * rcnts[index].rate;
rcnts[index].cycleStart = psxRegs.cycle - rcycles;
}
else
{
rcnts[index].cycle = 0x10000 * rcnts[index].rate;
rcnts[index].counterState = CountToOverflow;
}
if( rcnts[index].mode & RcIrqOnTarget )
{
if( (rcnts[index].mode & RcIrqRegenerate) || (!rcnts[index].irqState) )
{
verboseLog( 3, "[RCNT %i] irq\n", index );
setIrq( rcnts[index].irq );
rcnts[index].irqState = 1;
}
}
rcnts[index].mode |= RcCountEqTarget;
if( rcycles < 0x10000 * rcnts[index].rate )
return;
}
if( rcnts[index].counterState == CountToOverflow )
{
rcycles = psxRegs.cycle - rcnts[index].cycleStart;
rcycles -= 0x10000 * rcnts[index].rate;
rcnts[index].cycleStart = psxRegs.cycle - rcycles;
if( rcycles < rcnts[index].target * rcnts[index].rate )
{
rcnts[index].cycle = rcnts[index].target * rcnts[index].rate;
rcnts[index].counterState = CountToTarget;
}
if( rcnts[index].mode & RcIrqOnOverflow )
{
if( (rcnts[index].mode & RcIrqRegenerate) || (!rcnts[index].irqState) )
{
verboseLog( 3, "[RCNT %i] irq\n", index );
setIrq( rcnts[index].irq );
rcnts[index].irqState = 1;
}
}
rcnts[index].mode |= RcOverflow;
}
}