void GBReset(struct LR35902Core* cpu) {
struct GB* gb = (struct GB*) cpu->master;
GBDetectModel(gb);
if (gb->biosVf) {
if (!GBIsBIOS(gb->biosVf)) {
gb->biosVf->close(gb->biosVf);
gb->biosVf = NULL;
} else {
gb->biosVf->seek(gb->biosVf, 0, SEEK_SET);
gb->memory.romBase = malloc(GB_SIZE_CART_BANK0);
ssize_t size = gb->biosVf->read(gb->biosVf, gb->memory.romBase, GB_SIZE_CART_BANK0);
memcpy(&gb->memory.romBase[size], &gb->memory.rom[size], GB_SIZE_CART_BANK0 - size);
if (size > 0x100) {
memcpy(&gb->memory.romBase[0x100], &gb->memory.rom[0x100], sizeof(struct GBCartridge));
}
cpu->a = 0;
cpu->f.packed = 0;
cpu->c = 0;
cpu->e = 0;
cpu->h = 0;
cpu->l = 0;
cpu->sp = 0;
cpu->pc = 0;
}
}
cpu->b = 0;
cpu->d = 0;
if (!gb->biosVf) {
switch (gb->model) {
case GB_MODEL_DMG:
// TODO: SGB
case GB_MODEL_SGB:
case GB_MODEL_AUTODETECT: // Silence warnings
gb->model = GB_MODEL_DMG;
cpu->a = 1;
cpu->f.packed = 0xB0;
cpu->c = 0x13;
cpu->e = 0xD8;
cpu->h = 1;
cpu->l = 0x4D;
break;
case GB_MODEL_AGB:
cpu->b = 1;
// Fall through
case GB_MODEL_CGB:
cpu->a = 0x11;
cpu->f.packed = 0x80;
cpu->c = 0;
cpu->e = 0x08;
cpu->h = 0;
cpu->l = 0x7C;
break;
}
cpu->sp = 0xFFFE;
cpu->pc = 0x100;
}
gb->eiPending = INT_MAX;
gb->doubleSpeed = 0;
cpu->memory.setActiveRegion(cpu, cpu->pc);
if (gb->yankedRomSize) {
gb->memory.romSize = gb->yankedRomSize;
gb->yankedRomSize = 0;
}
GBMemoryReset(gb);
GBVideoReset(&gb->video);
GBTimerReset(&gb->timer);
GBAudioReset(&gb->audio);
GBIOReset(gb);
GBSIOReset(&gb->sio);
GBSavedataUnmask(gb);
}
bool retro_load_game(const struct retro_game_info* game) {
struct VFile* rom;
if (game->data) {
data = anonymousMemoryMap(game->size);
dataSize = game->size;
memcpy(data, game->data, game->size);
rom = VFileFromMemory(data, game->size);
} else {
data = 0;
rom = VFileOpen(game->path, O_RDONLY);
}
if (!rom) {
return false;
}
core = mCoreFindVF(rom);
if (!core) {
rom->close(rom);
mappedMemoryFree(data, game->size);
return false;
}
mCoreInitConfig(core, NULL);
core->init(core);
core->setAVStream(core, &stream);
size_t size = 256 * 224 * BYTES_PER_PIXEL;
outputBuffer = malloc(size);
memset(outputBuffer, 0xFF, size);
core->setVideoBuffer(core, outputBuffer, 256);
core->setAudioBufferSize(core, SAMPLES);
blip_set_rates(core->getAudioChannel(core, 0), core->frequency(core), 32768);
blip_set_rates(core->getAudioChannel(core, 1), core->frequency(core), 32768);
core->setPeripheral(core, mPERIPH_RUMBLE, &rumble);
savedata = anonymousMemoryMap(SIZE_CART_FLASH1M);
struct VFile* save = VFileFromMemory(savedata, SIZE_CART_FLASH1M);
_reloadSettings();
core->loadROM(core, rom);
core->loadSave(core, save);
const char* sysDir = 0;
const char* biosName = 0;
char biosPath[PATH_MAX];
environCallback(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &sysDir);
#ifdef M_CORE_GBA
if (core->platform(core) == PLATFORM_GBA) {
core->setPeripheral(core, mPERIPH_GBA_LUMINANCE, &lux);
biosName = "gba_bios.bin";
}
#endif
#ifdef M_CORE_GB
if (core->platform(core) == PLATFORM_GB) {
memset(&cam, 0, sizeof(cam));
cam.height = GBCAM_HEIGHT;
cam.width = GBCAM_WIDTH;
cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
cam.frame_raw_framebuffer = _updateCamera;
core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
struct GB* gb = core->board;
if (modelName) {
gb->model = GBNameToModel(modelName);
} else {
GBDetectModel(gb);
}
switch (gb->model) {
case GB_MODEL_AGB:
case GB_MODEL_CGB:
biosName = "gbc_bios.bin";
break;
case GB_MODEL_SGB:
biosName = "sgb_bios.bin";
break;
case GB_MODEL_DMG:
default:
biosName = "gb_bios.bin";
break;
}
}
#endif
if (core->opts.useBios && sysDir && biosName) {
snprintf(biosPath, sizeof(biosPath), "%s%s%s", sysDir, PATH_SEP, biosName);
struct VFile* bios = VFileOpen(biosPath, O_RDONLY);
if (bios) {
core->loadBIOS(core, bios, 0);
}
}
core->reset(core);
_setupMaps(core);
return true;
}
