void _GBMemoryDMAService(struct GB* gb) {
uint8_t b = GBLoad8(gb->cpu, gb->memory.dmaSource);
// TODO: Can DMA write OAM during modes 2-3?
gb->video.oam.raw[gb->memory.dmaDest] = b;
++gb->memory.dmaSource;
++gb->memory.dmaDest;
--gb->memory.dmaRemaining;
if (gb->memory.dmaRemaining) {
gb->memory.dmaNext += 4;
} else {
gb->memory.dmaNext = INT_MAX;
gb->cpu->memory.store8 = GBStore8;
gb->cpu->memory.load8 = GBLoad8;
}
}
void _GBMemoryDMAService(struct mTiming* timing, void* context, uint32_t cyclesLate) {
struct GB* gb = context;
int dmaRemaining = gb->memory.dmaRemaining;
gb->memory.dmaRemaining = 0;
uint8_t b = GBLoad8(gb->cpu, gb->memory.dmaSource);
// TODO: Can DMA write OAM during modes 2-3?
gb->video.oam.raw[gb->memory.dmaDest] = b;
gb->video.renderer->writeOAM(gb->video.renderer, gb->memory.dmaDest);
++gb->memory.dmaSource;
++gb->memory.dmaDest;
gb->memory.dmaRemaining = dmaRemaining - 1;
if (gb->memory.dmaRemaining) {
mTimingSchedule(timing, &gb->memory.dmaEvent, 4 - cyclesLate);
}
}
