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melonDS
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fix to timers (ZXDS no longer runs slow as shit)

This commit is contained in:
Arisotura 2020-10-27 05:03:17 +01:00
parent 81964a0f89
commit d2cd3eadbe
2 changed files with 23 additions and 9 deletions
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2
src/DSi_Camera.cpp
View File

@ -320,7 +320,7 @@ u32 DSi_Camera::Read32(u32 addr)
{
case 0x04004204:
{
return 0;
return 0xFC00801F;
if (!(Cnt & (1<<15))) return 0; // CHECKME
u32 ret = *(u32*)&FrameBuffer[TransferPos];
TransferPos += 4;

30
src/NDS.cpp
View File

@ -1470,7 +1470,7 @@ void HandleTimerOverflow(u32 tid)
{
Timer* timer = &Timers[tid];
timer->Counter += timer->Reload << 16;
timer->Counter += (timer->Reload << 10);
if (timer->Cnt & (1<<6))
SetIRQ(tid >> 2, IRQ_Timer0 + (tid & 0x3));
@ -1486,11 +1486,11 @@ void HandleTimerOverflow(u32 tid)
if ((timer->Cnt & 0x84) != 0x84)
break;
timer->Counter += 0x10000;
if (timer->Counter >> 16)
timer->Counter += (1 << 10);
if (!(timer->Counter >> 26))
break;
timer->Counter = timer->Reload << 16;
timer->Counter = timer->Reload << 10;
if (timer->Cnt & (1<<6))
SetIRQ(tid >> 2, IRQ_Timer0 + (tid & 0x3));
@ -1505,8 +1505,13 @@ void RunTimer(u32 tid, s32 cycles)
u32 oldcount = timer->Counter;
timer->Counter += (cycles << timer->CycleShift);
if (timer->Counter < oldcount)
//if (timer->Counter < oldcount)
// HandleTimerOverflow(tid);
while (timer->Counter >> 26)
{
timer->Counter -= (1 << 26);
HandleTimerOverflow(tid);
}
}
void RunTimers(u32 cpu)
@ -1623,7 +1628,7 @@ u16 TimerGetCounter(u32 timer)
RunTimers(timer>>2);
u32 ret = Timers[timer].Counter;
return ret >> 16;
return ret >> 10;
}
void TimerStart(u32 id, u16 cnt)
@ -1633,11 +1638,11 @@ void TimerStart(u32 id, u16 cnt)
u16 newstart = cnt & (1<<7);
timer->Cnt = cnt;
timer->CycleShift = 16 - TimerPrescaler[cnt & 0x03];
timer->CycleShift = 10 - TimerPrescaler[cnt & 0x03];
if ((!curstart) && newstart)
{
timer->Counter = timer->Reload << 16;
timer->Counter = timer->Reload << 10;
/*if ((cnt & 0x84) == 0x80)
{
@ -1799,6 +1804,15 @@ void StartSqrt()
void debug(u32 param)
{
if (param==1312)
{
u32 timer = 0x10000 - (Timers[3].Counter >> 16);
timer *= 16;
timer += (0x10000 - (Timers[2].Counter >> 16));
printf("TIMER=%d (%04X/%04X)\n", timer, (Timers[2].Counter >> 16), (Timers[3].Counter >> 16));
return;
}
printf("ARM9 PC=%08X LR=%08X %08X\n", ARM9->R[15], ARM9->R[14], ARM9->R_IRQ[1]);
printf("ARM7 PC=%08X LR=%08X %08X\n", ARM7->R[15], ARM7->R[14], ARM7->R_IRQ[1]);