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Reroll IRQ edge case fix

This commit is contained in:
OV2 2012-06-04 21:31:27 +02:00
parent 679db377c7
commit a08f4fb531
1 changed files with 3 additions and 4 deletions
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7
cpuexec.h
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@ -278,10 +278,9 @@ static inline void S9xCheckInterrupts (void)
if (CPU.IRQLine && thisIRQ) if (CPU.IRQLine && thisIRQ)
CPU.IRQTransition = TRUE; CPU.IRQTransition = TRUE;
int32 htimepos = PPU.HTimerEnabled ? PPU.HTimerPosition : 10; if (PPU.HTimerEnabled)
if (thisIRQ)
{ {
int32 htimepos = PPU.HTimerPosition;
if (CPU.Cycles >= Timings.H_Max && htimepos < CPU.PrevCycles) if (CPU.Cycles >= Timings.H_Max && htimepos < CPU.PrevCycles)
htimepos += Timings.H_Max; htimepos += Timings.H_Max;
@ -292,7 +291,7 @@ static inline void S9xCheckInterrupts (void)
if (PPU.VTimerEnabled) if (PPU.VTimerEnabled)
{ {
int32 vcounter = CPU.V_Counter; int32 vcounter = CPU.V_Counter;
if (htimepos >= Timings.H_Max) if (CPU.Cycles >= Timings.H_Max && (!PPU.HTimerEnabled || PPU.HTimerPosition < CPU.PrevCycles))
vcounter++; vcounter++;
if (vcounter != PPU.VTimerPosition) if (vcounter != PPU.VTimerPosition)