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GB: Delay EI

This commit is contained in:
Jeffrey Pfau 2016-01-26 20:56:39 -08:00
parent 81f8ad27d5
commit bac417d270
2 changed files with 19 additions and 2 deletions
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19
src/gb/gb.c
View File

@ -52,6 +52,8 @@ static void GBInit(struct LR35902Core* cpu, struct LR35902Component* component)
gb->pristineRom = 0;
gb->pristineRomSize = 0;
gb->yankedRomSize = 0;
gb->eiPending = false;
}
bool GBLoadROM(struct GB* gb, struct VFile* vf, struct VFile* sav, const char* fname) {
@ -198,6 +200,12 @@ void GBProcessEvents(struct LR35902Core* cpu) {
int32_t nextEvent = INT_MAX;
int32_t testEvent;
if (gb->eiPending) {
gb->memory.ime = true;
GBUpdateIRQs(gb);
gb->eiPending = false;
}
testEvent = GBVideoProcessEvents(&gb->video, cycles);
if (testEvent < nextEvent) {
nextEvent = testEvent;
@ -224,8 +232,15 @@ void GBProcessEvents(struct LR35902Core* cpu) {
void GBSetInterrupts(struct LR35902Core* cpu, bool enable) {
struct GB* gb = (struct GB*) cpu->master;
gb->memory.ime = enable;
GBUpdateIRQs(gb);
if (!enable) {
gb->memory.ime = enable;
GBUpdateIRQs(gb);
} else {
if (cpu->nextEvent > 4) {
cpu->nextEvent = 4;
}
gb->eiPending = true;
}
}
void GBHalt(struct LR35902Core* cpu) {

2
src/gb/gb.h
View File

@ -57,6 +57,8 @@ struct GB {
struct VFile* sramVf;
const char* activeFile;
bool eiPending;
};
struct GBCartridge {