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GB: Fix maximum cartridge size with MBC5

This commit is contained in:
Jeffrey Pfau 2016-02-21 11:38:36 -08:00
parent ceac601e60
commit cbc3be7571
3 changed files with 16 additions and 8 deletions
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8
src/gb/gb.c
View File

@ -114,7 +114,7 @@ void GBUnloadROM(struct GB* gb) {
if (gb->yankedRomSize) {
gb->yankedRomSize = 0;
}
mappedMemoryFree(gb->memory.rom, 0x400000);
mappedMemoryFree(gb->memory.rom, GB_SIZE_CART_MAX);
}
gb->memory.rom = 0;
@ -140,10 +140,10 @@ void GBApplyPatch(struct GB* gb, struct Patch* patch) {
if (!patchedSize) {
return;
}
if (patchedSize > 0x400000) {
patchedSize = 0x400000;
if (patchedSize > GB_SIZE_CART_MAX) {
patchedSize = GB_SIZE_CART_MAX;
}
gb->memory.rom = anonymousMemoryMap(0x400000);
gb->memory.rom = anonymousMemoryMap(GB_SIZE_CART_MAX);
if (!patch->applyPatch(patch, gb->pristineRom, gb->pristineRomSize, gb->memory.rom, patchedSize)) {
mappedMemoryFree(gb->memory.rom, patchedSize);
gb->memory.rom = gb->pristineRom;

15
src/gb/memory.c
View File

@ -514,9 +514,10 @@ void _GBMBC3(struct GBMemory* memory, uint16_t address, uint8_t value) {
}
void _GBMBC5(struct GBMemory* memory, uint16_t address, uint8_t value) {
int bank = value;
switch (address >> 13) {
int bank;
switch (address >> 12) {
case 0x0:
case 0x1:
switch (value) {
case 0:
memory->sramAccess = false;
@ -531,10 +532,16 @@ void _GBMBC5(struct GBMemory* memory, uint16_t address, uint8_t value) {
break;
}
break;
case 0x1:
case 0x2:
bank = (memory->currentBank & 0x100) | value;
_switchBank(memory, bank);
break;
case 0x2:
case 0x3:
bank = (memory->currentBank & 0xFF) | ((value & 1) << 8);
_switchBank(memory, bank);
break;
case 0x4:
case 0x5:
if (memory->mbcType == GB_MBC5_RUMBLE) {
memory->rumble->setRumble(memory->rumble, (value >> 3) & 1);
value &= ~8;

1
src/gb/memory.h
View File

@ -44,6 +44,7 @@ enum {
enum {
GB_SIZE_CART_BANK0 = 0x4000,
GB_SIZE_CART_MAX = 0x800000,
GB_SIZE_VRAM = 0x4000,
GB_SIZE_VRAM_BANK0 = 0x2000,
GB_SIZE_EXTERNAL_RAM = 0x2000,