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GB Cheats: Fix Game Genie codes that apply to ROM banks

This commit is contained in:
Jeffrey Pfau 2016-09-16 19:47:43 -07:00
parent 50466642ad
commit a71007267d
2 changed files with 16 additions and 5 deletions
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20
src/gb/cheats.c
View File

@ -6,6 +6,7 @@
#include "cheats.h"
#include "core/core.h"
#include "gb/gb.h"
#include "gb/memory.h"
#include "util/string.h"
@ -21,15 +22,24 @@ static void _patchROM(struct mCheatDevice* device, struct GBCheatSet* cheats) {
if (patch->applied) {
continue;
}
int segment = 0;
if (patch->checkByte) {
// TODO: All segments
int8_t value = GBView8(device->p->cpu, patch->address, 0);
if (value != patch->oldValue) {
struct GB* gb = device->p->board;
int maxSegment = (gb->memory.romSize + GB_SIZE_CART_BANK0 - 1) / GB_SIZE_CART_BANK0;
for (; segment < maxSegment; ++segment) {
int8_t value = GBView8(device->p->cpu, patch->address, segment);
if (value == patch->oldValue) {
break;
}
}
if (segment == maxSegment) {
continue;
}
}
GBPatch8(device->p->cpu, patch->address, patch->newValue, &patch->oldValue, 0);
// TODO: More than one segment
GBPatch8(device->p->cpu, patch->address, patch->newValue, &patch->oldValue, segment);
patch->applied = true;
patch->segment = segment;
}
}
@ -43,7 +53,7 @@ static void _unpatchROM(struct mCheatDevice* device, struct GBCheatSet* cheats)
if (!patch->applied) {
continue;
}
GBPatch8(device->p->cpu, patch->address, patch->oldValue, &patch->newValue, 0);
GBPatch8(device->p->cpu, patch->address, patch->oldValue, &patch->newValue, patch->segment);
patch->applied = false;
}
}

1
src/gb/cheats.h
View File

@ -22,6 +22,7 @@ struct GBCheatPatch {
uint16_t address;
int8_t newValue;
int8_t oldValue;
int segment;
bool applied;
bool checkByte;
};