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GB Video: Only trigger STAT write IRQs when screen is on (fixes #912)

This commit is contained in:
Vicki Pfau 2017-10-18 09:19:10 -07:00
parent c94aff135f
commit 523aaf1497
2 changed files with 5 additions and 1 deletions
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1
CHANGES
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@ -20,6 +20,7 @@ Bugfixes:
- GBA Video: Force align 256-color tiles
- GBA DMA: ROM reads are forced to increment
- GB Video: Fix loading states while in mode 3
- GB Video: Only trigger STAT write IRQs when screen is on (fixes mgba.io/i/912)
Misc:
- GBA Timer: Use global cycles for timers
- GBA: Extend oddly-sized ROMs to full address space (fixes mgba.io/i/722)

5
src/gb/video.c
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@ -455,7 +455,10 @@ void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
GBRegisterSTAT oldStat = video->stat;
video->stat = (video->stat & 0x7) | (value & 0x78);
if (video->p->model < GB_MODEL_CGB && !_statIRQAsserted(video, oldStat) && video->mode < 3) {
if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
return;
}
if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
// TODO: variable for the IRQ line value?
video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
GBUpdateIRQs(video->p);