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DS Video: Add vblank DMAs

This commit is contained in:
Vicki Pfau 2017-03-19 09:23:23 -07:00
parent 2700736c78
commit 53778e8d92
3 changed files with 17 additions and 0 deletions
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1
include/mgba/internal/ds/dma.h
View File

@ -39,6 +39,7 @@ void DS9DMAWriteCNT(struct DSCommon* dscore, int dma, uint32_t value);
struct DSDMA;
void DSDMASchedule(struct DSCommon* dscore, int number, struct GBADMA* info);
void DSDMARunVblank(struct DSCommon* dscore, int32_t cycles);
void DSDMAUpdate(struct DSCommon* dscore);
CXX_GUARD_END

14
src/ds/dma.c
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@ -145,6 +145,20 @@ void _dmaEvent(struct mTiming* timing, void* context, uint32_t cyclesLate) {
}
}
void DSDMARunVblank(struct DSCommon* dscore, int32_t cycles) {
struct DSCoreMemory* memory = &dscore->memory;
struct GBADMA* dma;
int i;
for (i = 0; i < 4; ++i) {
dma = &memory->dma[i];
if (GBADMARegisterIsEnable(dma->reg) && GBADMARegisterGetTiming(dma->reg) == DMA_TIMING_VBLANK && !dma->nextCount) {
dma->when = mTimingCurrentTime(&dscore->timing) + 3 + cycles;
dma->nextCount = dma->count;
}
}
DSDMAUpdate(dscore);
}
void DSDMAUpdate(struct DSCommon* dscore) {
int i;
struct DSCoreMemory* memory = &dscore->memory;

2
src/ds/video.c
View File

@ -292,6 +292,7 @@ void _startHdraw7(struct mTiming* timing, void* context, uint32_t cyclesLate) {
switch (video->vcount) {
case DS_VIDEO_VERTICAL_PIXELS:
DSDMARunVblank(&video->p->ds7, -cyclesLate);
video->p->ds7.memory.io[DS_REG_DISPSTAT >> 1] = GBARegisterDISPSTATFillInVblank(dispstat);
if (GBARegisterDISPSTATIsVblankIRQ(dispstat)) {
DSRaiseIRQ(video->p->ds7.cpu, video->p->ds7.memory.io, DS_IRQ_VBLANK);
@ -349,6 +350,7 @@ void _startHdraw9(struct mTiming* timing, void* context, uint32_t cyclesLate) {
video->inCapture = DSRegisterDISPCAPCNTIsEnable(video->p->ds9.memory.io[DS9_REG_DISPCAPCNT_HI >> 1] << 16);
break;
case DS_VIDEO_VERTICAL_PIXELS:
DSDMARunVblank(&video->p->ds9, -cyclesLate);
video->p->ds9.memory.io[DS_REG_DISPSTAT >> 1] = GBARegisterDISPSTATFillInVblank(dispstat);
video->p->ds9.memory.io[DS9_REG_DISPCAPCNT_HI >> 1] = DSRegisterDISPCAPCNTClearEnable(video->p->ds9.memory.io[DS9_REG_DISPCAPCNT_HI >> 1] << 16) >> 16;
if (video->frameskipCounter <= 0) {