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GB: Save support

This commit is contained in:
Jeffrey Pfau 2016-01-22 20:22:34 -08:00
parent 52875a082e
commit 497fc2ade3
3 changed files with 15 additions and 5 deletions
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15
src/gb/gb.c
View File

@ -44,6 +44,7 @@ static void GBInit(struct LR35902Core* cpu, struct LR35902Component* component)
gb->timer.p = gb;
gb->romVf = 0;
gb->sramVf = 0;
gb->pristineRom = 0;
gb->pristineRomSize = 0;
@ -72,6 +73,12 @@ bool GBLoadROM(struct GB* gb, struct VFile* vf, struct VFile* sav, const char* f
gb->activeFile = fname;
gb->memory.romSize = gb->pristineRomSize;
gb->romCrc32 = doCrc32(gb->memory.rom, gb->memory.romSize);
gb->sramVf = sav;
if (sav) {
gb->memory.sram = sav->map(sav, 0x8000, MAP_WRITE);
} else {
gb->memory.sram = anonymousMemoryMap(0x8000);
}
return true;
// TODO: error check
}
@ -93,6 +100,13 @@ void GBUnloadROM(struct GB* gb) {
gb->pristineRom = 0;
gb->romVf = 0;
}
if (gb->sramVf) {
gb->sramVf->unmap(gb->sramVf, gb->memory.sram, 0x8000);
} else if (gb->memory.sram) {
mappedMemoryFree(gb->memory.sram, 0x8000);
}
gb->memory.sram = 0;
}
void GBDestroy(struct GB* gb) {
@ -209,7 +223,6 @@ void GBSetInterrupts(struct LR35902Core* cpu, bool enable) {
}
void GBHalt(struct LR35902Core* cpu) {
struct GB* gb = (struct GB*) cpu->master;
cpu->cycles = cpu->nextEvent;
cpu->halted = true;
}

1
src/gb/gb.h
View File

@ -50,6 +50,7 @@ struct GB {
size_t yankedRomSize;
uint32_t romCrc32;
struct VFile* romVf;
struct VFile* sramVf;
const char* activeFile;
};

4
src/gb/memory.c
View File

@ -57,9 +57,6 @@ void GBMemoryDeinit(struct GB* gb) {
if (gb->memory.rom) {
mappedMemoryFree(gb->memory.rom, gb->memory.romSize);
}
if (gb->memory.sram) {
mappedMemoryFree(gb->memory.sram, 0x8000);
}
}
void GBMemoryReset(struct GB* gb) {
@ -70,7 +67,6 @@ void GBMemoryReset(struct GB* gb) {
gb->memory.wramBank = &gb->memory.wram[GB_SIZE_WORKING_RAM_BANK0];
gb->memory.romBank = &gb->memory.rom[GB_SIZE_CART_BANK0];
gb->memory.currentBank = 1;
gb->memory.sram = anonymousMemoryMap(0x8000); // TODO: Persist
gb->memory.sramCurrentBank = 0;
memset(&gb->video.oam, 0, sizeof(gb->video.oam));