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GB Video: Implement LYC

This commit is contained in:
Jeffrey Pfau 2016-01-21 19:43:40 -08:00
parent 25627bf6a3
commit 47364e4769
1 changed files with 6 additions and 2 deletions
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8
src/gb/video.c
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@ -88,13 +88,17 @@ int32_t GBVideoProcessEvents(struct GBVideo* video, int32_t cycles) {
case 0:
++video->ly;
video->p->memory.io[REG_LY] = video->ly;
int lyc = video->p->memory.io[REG_LYC];
video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
if (GBRegisterSTATIsLYCIRQ(video->stat) && lyc == video->ly) {
video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
}
if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
video->renderer->drawScanline(video->renderer, video->ly);
video->nextMode = GB_VIDEO_MODE_2_LENGTH;
video->mode = 2;
if (GBRegisterSTATIsOAMIRQ(video->stat)) {
video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
GBUpdateIRQs(video->p);
}
} else {
video->nextMode = GB_VIDEO_HORIZONTAL_LENGTH;
@ -105,8 +109,8 @@ int32_t GBVideoProcessEvents(struct GBVideo* video, int32_t cycles) {
video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
}
video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
GBUpdateIRQs(video->p);
}
GBUpdateIRQs(video->p);
break;
case 1:
++video->ly;