all repos — mgba @ 1589b26ade442d1779ac339ca1e1b56b17fede27

mGBA Game Boy Advance Emulator

GB Video: Register LYC during Vblank
Jeffrey Pfau jeffrey@endrift.com
Wed, 27 Jan 2016 23:00:23 -0800
commit

1589b26ade442d1779ac339ca1e1b56b17fede27

parent

b9e6ac954d606130f968878138163e304fdaa4c4

1 files changed, 5 insertions(+), 1 deletions(-)

jump to
M src/gb/video.c → src/gb/video.c 
@@ -85,11 +85,11 @@ if (video->nextEvent != INT_MAX) {
 			video->nextMode -= video->eventDiff;
 		}
 		if (video->nextMode <= 0) {
+			int lyc = video->p->memory.io[REG_LYC];
 			switch (video->mode) {
 			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);

@@ -115,6 +115,10 @@ GBUpdateIRQs(video->p);
 				break;
 			case 1:
 				++video->ly;
+				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_TOTAL_PIXELS) {
 					video->ly = 0;
 					video->renderer->drawScanline(video->renderer, video->ly);