bool GBASDLInitAudio(struct GBASDLAudio* context, struct GBAThread* threadContext) {
if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
GBALog(0, GBA_LOG_ERROR, "Could not initialize SDL sound system");
return false;
}
context->desiredSpec.freq = 44100;
context->desiredSpec.format = AUDIO_S16SYS;
context->desiredSpec.channels = 2;
context->desiredSpec.samples = context->samples;
context->desiredSpec.callback = _GBASDLAudioCallback;
context->desiredSpec.userdata = context;
#if RESAMPLE_LIBRARY == RESAMPLE_NN
context->drift = 0.f;
#endif
if (SDL_OpenAudio(&context->desiredSpec, &context->obtainedSpec) < 0) {
GBALog(0, GBA_LOG_ERROR, "Could not open SDL sound system");
return false;
}
context->thread = threadContext;
context->samples = context->obtainedSpec.samples;
float ratio = GBAAudioCalculateRatio(0x8000, threadContext->fpsTarget, 44100);
threadContext->audioBuffers = context->samples / ratio;
if (context->samples > threadContext->audioBuffers) {
threadContext->audioBuffers = context->samples * 2;
}
SDL_PauseAudio(0);
return true;
}
bool GBASDLInitAudio(struct GBASDLAudio* context, struct GBAThread* threadContext) {
if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
GBALog(0, GBA_LOG_ERROR, "Could not initialize SDL sound system: %s", SDL_GetError());
return false;
}
context->desiredSpec.freq = 44100;
context->desiredSpec.format = AUDIO_S16SYS;
context->desiredSpec.channels = 2;
context->desiredSpec.samples = context->samples;
context->desiredSpec.callback = _GBASDLAudioCallback;
context->desiredSpec.userdata = context;
#if RESAMPLE_LIBRARY == RESAMPLE_NN
context->drift = 0.f;
#endif
#if SDL_VERSION_ATLEAST(2, 0, 0)
context->deviceId = SDL_OpenAudioDevice(0, 0, &context->desiredSpec, &context->obtainedSpec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
if (context->deviceId == 0) {
#else
if (SDL_OpenAudio(&context->desiredSpec, &context->obtainedSpec) < 0) {
#endif
GBALog(0, GBA_LOG_ERROR, "Could not open SDL sound system");
return false;
}
context->thread = threadContext;
context->samples = context->obtainedSpec.samples;
float ratio = GBAAudioCalculateRatio(0x8000, threadContext->fpsTarget, 44100);
threadContext->audioBuffers = context->samples / ratio;
if (context->samples > threadContext->audioBuffers) {
threadContext->audioBuffers = context->samples * 2;
}
#if SDL_VERSION_ATLEAST(2, 0, 0)
SDL_PauseAudioDevice(context->deviceId, 0);
#else
SDL_PauseAudio(0);
#endif
return true;
}
void GBASDLDeinitAudio(struct GBASDLAudio* context) {
UNUSED(context);
#if SDL_VERSION_ATLEAST(2, 0, 0)
SDL_PauseAudioDevice(context->deviceId, 1);
SDL_CloseAudioDevice(context->deviceId);
#else
SDL_PauseAudio(1);
SDL_CloseAudio();
#endif
SDL_QuitSubSystem(SDL_INIT_AUDIO);
}
static uint16_t GBASIOLockstepNodeWriteRegister(struct GBASIODriver* driver, uint32_t address, uint16_t value) {
struct GBASIOLockstepNode* node = (struct GBASIOLockstepNode*) driver;
if (address == REG_SIOCNT) {
GBALog(node->d.p->p, GBA_LOG_SIO, "Lockstep %i: SIOCNT <- %04x", node->id, value);
if (value & 0x0080) {
if (!node->id) {
GBALog(node->d.p->p, GBA_LOG_SIO, "Lockstep %i: Transfer initiated", node->id);
MutexLock(&node->p->mutex);
node->p->transferActive = true;
node->p->transferCycles = GBASIOCyclesPerTransfer[node->d.p->multiplayerControl.baud][node->p->attached - 1];
node->multiSend = node->d.p->p->memory.io[REG_SIOMLT_SEND >> 1];
MutexUnlock(&node->p->mutex);
} else {
bool GBASaveState(struct GBAThread* threadContext, struct VDir* dir, int slot, bool screenshot) {
struct VFile* vf = GBAGetState(threadContext->gba, dir, slot, true);
if (!vf) {
return false;
}
bool success = GBASaveStateNamed(threadContext->gba, vf, screenshot);
vf->close(vf);
if (success) {
GBALog(threadContext->gba, GBA_LOG_STATUS, "State %i saved", slot);
} else {
GBALog(threadContext->gba, GBA_LOG_STATUS, "State %i failed to save", slot);
}
return success;
}
bool GBALoadState(struct GBAThread* threadContext, struct VDir* dir, int slot) {
struct VFile* vf = GBAGetState(threadContext->gba, dir, slot, false);
if (!vf) {
return false;
}
threadContext->rewindBufferSize = 0;
bool success = GBALoadStateNamed(threadContext->gba, vf);
vf->close(vf);
if (success) {
GBALog(threadContext->gba, GBA_LOG_STATUS, "State %i loaded", slot);
} else {
GBALog(threadContext->gba, GBA_LOG_STATUS, "State %i failed to load", slot);
}
return success;
}
uint16_t GBARRQueryInput(struct GBARRContext* rr) {
if (!GBARRIsPlaying(rr)) {
return 0;
}
if (rr->peekedTag == TAG_INPUT) {
_readTag(rr, rr->movieStream);
}
rr->inputThisFrame = true;
if (rr->currentInput == INVALID_INPUT) {
GBALog(0, GBA_LOG_WARN, "[RR] Stream did not specify input");
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Input replay: %03X", rr->currentInput);
return rr->currentInput;
}
uint16_t GBAMGMQueryInput(struct GBARRContext* rr) {
if (!rr->isPlaying(rr)) {
return 0;
}
struct GBAMGMContext* mgm = (struct GBAMGMContext*) rr;
if (mgm->peekedTag == TAG_INPUT) {
_readTag(mgm, mgm->movieStream);
}
mgm->inputThisFrame = true;
if (mgm->currentInput == INVALID_INPUT) {
GBALog(0, GBA_LOG_WARN, "[RR] Stream did not specify input");
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Input replay: %03X", mgm->currentInput);
return mgm->currentInput;
}
bool _loadStream(struct GBAMGMContext* mgm, uint32_t streamId) {
if (mgm->movieStream && !mgm->movieStream->close(mgm->movieStream)) {
return false;
}
mgm->movieStream = 0;
mgm->streamId = streamId;
mgm->currentInput = INVALID_INPUT;
char buffer[14];
snprintf(buffer, sizeof(buffer), "%u" BINARY_EXT, streamId);
if (mgm->d.isRecording(&mgm->d)) {
int flags = O_CREAT | O_RDWR;
if (streamId > mgm->maxStreamId) {
flags |= O_TRUNC;
}
mgm->movieStream = mgm->streamDir->openFile(mgm->streamDir, buffer, flags);
} else if (mgm->d.isPlaying(&mgm->d)) {
mgm->movieStream = mgm->streamDir->openFile(mgm->streamDir, buffer, O_RDONLY);
mgm->peekedTag = TAG_INVALID;
if (!mgm->movieStream || !_verifyMagic(mgm, mgm->movieStream) || !_seekTag(mgm, mgm->movieStream, TAG_BEGIN)) {
mgm->d.stopPlaying(&mgm->d);
}
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Loading segment: %u", streamId);
mgm->d.frames = 0;
mgm->d.lagFrames = 0;
return true;
}
bool GBARRLoadStream(struct GBARRContext* rr, uint32_t streamId) {
if (rr->movieStream && !rr->movieStream->close(rr->movieStream)) {
return false;
}
rr->movieStream = 0;
rr->streamId = streamId;
rr->currentInput = INVALID_INPUT;
char buffer[14];
snprintf(buffer, sizeof(buffer), "%u" BINARY_EXT, streamId);
if (GBARRIsRecording(rr)) {
int flags = O_CREAT | O_RDWR;
if (streamId > rr->maxStreamId) {
flags |= O_TRUNC;
}
rr->movieStream = rr->streamDir->openFile(rr->streamDir, buffer, flags);
} else if (GBARRIsPlaying(rr)) {
rr->movieStream = rr->streamDir->openFile(rr->streamDir, buffer, O_RDONLY);
rr->peekedTag = TAG_INVALID;
if (!rr->movieStream || !_verifyMagic(rr, rr->movieStream) || !_seekTag(rr, rr->movieStream, TAG_BEGIN)) {
GBARRStopPlaying(rr);
}
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Loading segment: %u", streamId);
rr->frames = 0;
rr->lagFrames = 0;
return true;
}
bool GBASIOLockstepNodeInit(struct GBASIODriver* driver) {
struct GBASIOLockstepNode* node = (struct GBASIOLockstepNode*) driver;
node->nextEvent = LOCKSTEP_INCREMENT;
node->d.p->multiplayerControl.slave = node->id > 0;
GBALog(node->d.p->p, GBA_LOG_SIO, "Lockstep %i: Node init", node->id);
return true;
}
void _rtcProcessByte(struct GBACartridgeHardware* hw) {
--hw->rtc.bytesRemaining;
if (!hw->rtc.commandActive) {
union RTCCommandData command;
command.packed = hw->rtc.bits;
if (command.magic == 0x06) {
hw->rtc.command = command;
hw->rtc.bytesRemaining = RTC_BYTES[hw->rtc.command.command];
hw->rtc.commandActive = hw->rtc.bytesRemaining > 0;
switch (command.command) {
case RTC_RESET:
hw->rtc.control.packed = 0;
break;
case RTC_DATETIME:
case RTC_TIME:
_rtcUpdateClock(hw);
break;
case RTC_FORCE_IRQ:
case RTC_CONTROL:
break;
}
} else {
GBALog(hw->p, GBA_LOG_WARN, "Invalid RTC command byte: %02X", hw->rtc.bits);
}
} else {
switch (hw->rtc.command.command) {
case RTC_CONTROL:
hw->rtc.control.packed = hw->rtc.bits;
break;
case RTC_FORCE_IRQ:
GBALog(hw->p, GBA_LOG_STUB, "Unimplemented RTC command %u", hw->rtc.command.command);
break;
case RTC_RESET:
case RTC_DATETIME:
case RTC_TIME:
break;
}
}
hw->rtc.bits = 0;
hw->rtc.bitsRead = 0;
if (!hw->rtc.bytesRemaining) {
hw->rtc.commandActive = 0;
hw->rtc.command.reading = 0;
}
}
void GBATakeScreenshot(struct GBA* gba, struct VDir* dir) {
#ifdef USE_PNG
unsigned stride;
const void* pixels = 0;
struct VFile* vf = VDirOptionalOpenIncrementFile(dir, gba->activeFile, "screenshot", "-", ".png", O_CREAT | O_TRUNC | O_WRONLY);
bool success = false;
if (vf) {
gba->video.renderer->getPixels(gba->video.renderer, &stride, &pixels);
png_structp png = PNGWriteOpen(vf);
png_infop info = PNGWriteHeader(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
success = PNGWritePixels(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, stride, pixels);
PNGWriteClose(png, info);
vf->close(vf);
}
if (success) {
GBALog(gba, GBA_LOG_STATUS, "Screenshot saved");
return;
}
#endif
GBALog(gba, GBA_LOG_STATUS, "Failed to take screenshot");
}
void GBARRLogInput(struct GBARRContext* rr, uint16_t keys) {
if (!GBARRIsRecording(rr)) {
return;
}
if (keys != rr->currentInput) {
_emitTag(rr, rr->movieStream, TAG_INPUT);
rr->movieStream->write(rr->movieStream, &keys, sizeof(keys));
rr->currentInput = keys;
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Input log: %03X", rr->currentInput);
rr->inputThisFrame = true;
}
void GBAMGMNextFrame(struct GBARRContext* rr) {
if (!rr->isRecording(rr) && !rr->isPlaying(rr)) {
return;
}
struct GBAMGMContext* mgm = (struct GBAMGMContext*) rr;
if (rr->isPlaying(rr)) {
while (mgm->peekedTag == TAG_INPUT) {
_readTag(mgm, mgm->movieStream);
GBALog(0, GBA_LOG_WARN, "[RR] Desync detected!");
}
if (mgm->peekedTag == TAG_LAG) {
GBALog(0, GBA_LOG_DEBUG, "[RR] Lag frame marked in stream");
if (mgm->inputThisFrame) {
GBALog(0, GBA_LOG_WARN, "[RR] Lag frame in stream does not match movie");
}
}
}
++mgm->d.frames;
GBALog(0, GBA_LOG_DEBUG, "[RR] Frame: %u", mgm->d.frames);
if (!mgm->inputThisFrame) {
++mgm->d.lagFrames;
GBALog(0, GBA_LOG_DEBUG, "[RR] Lag frame: %u", mgm->d.lagFrames);
}
if (rr->isRecording(rr)) {
if (!mgm->inputThisFrame) {
_emitTag(mgm, mgm->movieStream, TAG_LAG);
}
_emitTag(mgm, mgm->movieStream, TAG_FRAME);
mgm->inputThisFrame = false;
} else {
if (!_seekTag(mgm, mgm->movieStream, TAG_FRAME)) {
_streamEndReached(mgm);
}
}
}
void GBAMGMLogInput(struct GBARRContext* rr, uint16_t keys) {
if (!rr->isRecording(rr)) {
return;
}
struct GBAMGMContext* mgm = (struct GBAMGMContext*) rr;
if (keys != mgm->currentInput) {
_emitTag(mgm, mgm->movieStream, TAG_INPUT);
mgm->movieStream->write(mgm->movieStream, &keys, sizeof(keys));
mgm->currentInput = keys;
}
GBALog(0, GBA_LOG_DEBUG, "[RR] Input log: %03X", mgm->currentInput);
mgm->inputThisFrame = true;
}
bool _incrementStream(struct GBAMGMContext* mgm, bool recursive) {
uint32_t newStreamId = mgm->maxStreamId + 1;
uint32_t oldStreamId = mgm->streamId;
if (mgm->d.isRecording(&mgm->d) && mgm->movieStream) {
if (!_markStreamNext(mgm, newStreamId, recursive)) {
return false;
}
}
if (!_loadStream(mgm, newStreamId)) {
return false;
}
GBALog(0, GBA_LOG_DEBUG, "[RR] New segment: %u", newStreamId);
_emitMagic(mgm, mgm->movieStream);
mgm->maxStreamId = newStreamId;
_emitTag(mgm, mgm->movieStream, TAG_PREVIOUSLY);
mgm->movieStream->write(mgm->movieStream, &oldStreamId, sizeof(oldStreamId));
_emitTag(mgm, mgm->movieStream, TAG_BEGIN);
mgm->metadataFile->seek(mgm->metadataFile, mgm->maxStreamIdOffset, SEEK_SET);
mgm->metadataFile->write(mgm->metadataFile, &mgm->maxStreamId, sizeof(mgm->maxStreamId));
mgm->previously = oldStreamId;
return true;
}
bool GBARRIncrementStream(struct GBARRContext* rr, bool recursive) {
uint32_t newStreamId = rr->maxStreamId + 1;
uint32_t oldStreamId = rr->streamId;
if (GBARRIsRecording(rr) && rr->movieStream) {
if (!_markStreamNext(rr, newStreamId, recursive)) {
return false;
}
}
if (!GBARRLoadStream(rr, newStreamId)) {
return false;
}
GBALog(0, GBA_LOG_DEBUG, "[RR] New segment: %u", newStreamId);
_emitMagic(rr, rr->movieStream);
rr->maxStreamId = newStreamId;
_emitTag(rr, rr->movieStream, TAG_PREVIOUSLY);
rr->movieStream->write(rr->movieStream, &oldStreamId, sizeof(oldStreamId));
_emitTag(rr, rr->movieStream, TAG_BEGIN);
rr->metadataFile->seek(rr->metadataFile, rr->maxStreamIdOffset, SEEK_SET);
rr->metadataFile->write(rr->metadataFile, &rr->maxStreamId, sizeof(rr->maxStreamId));
rr->previously = oldStreamId;
return true;
}
void GBAHardwareGPIOWrite(struct GBACartridgeHardware* hw, uint32_t address, uint16_t value) {
switch (address) {
case GPIO_REG_DATA:
hw->pinState &= ~hw->direction;
hw->pinState |= value;
_readPins(hw);
break;
case GPIO_REG_DIRECTION:
hw->direction = value;
break;
case GPIO_REG_CONTROL:
hw->readWrite = value;
break;
default:
GBALog(hw->p, GBA_LOG_WARN, "Invalid GPIO address");
}
if (hw->readWrite) {
uint16_t old = hw->gpioBase[0];
old &= ~hw->direction;
hw->gpioBase[0] = old | hw->pinState;
} else {
hw->gpioBase[0] = 0;
}
}
bool GBADeserialize(struct GBA* gba, const struct GBASerializedState* state) {
bool error = false;
if (state->versionMagic != GBA_SAVESTATE_MAGIC) {
GBALog(gba, GBA_LOG_WARN, "Invalid or too new savestate");
error = true;
}
if (state->biosChecksum != gba->biosChecksum) {
GBALog(gba, GBA_LOG_WARN, "Savestate created using a different version of the BIOS");
if (state->cpu.gprs[ARM_PC] < SIZE_BIOS && state->cpu.gprs[ARM_PC] >= 0x20) {
error = true;
}
}
if (gba->memory.rom && (state->id != ((struct GBACartridge*) gba->memory.rom)->id || memcmp(state->title, ((struct GBACartridge*) gba->memory.rom)->title, sizeof(state->title)))) {
GBALog(gba, GBA_LOG_WARN, "Savestate is for a different game");
error = true;
} else if (!gba->memory.rom && state->id != 0) {
GBALog(gba, GBA_LOG_WARN, "Savestate is for a game, but no game loaded");
error = true;
}
if (state->romCrc32 != gba->romCrc32) {
GBALog(gba, GBA_LOG_WARN, "Savestate is for a different version of the game");
}
if (state->cpu.cycles < 0) {
GBALog(gba, GBA_LOG_WARN, "Savestate is corrupted: CPU cycles are negative");
error = true;
}
if (state->cpu.cycles >= (int32_t) GBA_ARM7TDMI_FREQUENCY) {
GBALog(gba, GBA_LOG_WARN, "Savestate is corrupted: CPU cycles are too high");
error = true;
}
if (state->video.eventDiff < 0) {
GBALog(gba, GBA_LOG_WARN, "Savestate is corrupted: video eventDiff is negative");
error = true;
}
int region = (state->cpu.gprs[ARM_PC] >> BASE_OFFSET);
if ((region == REGION_CART0 || region == REGION_CART1 || region == REGION_CART2) && ((state->cpu.gprs[ARM_PC] - WORD_SIZE_ARM) & SIZE_CART0) >= gba->memory.romSize - WORD_SIZE_ARM) {
GBALog(gba, GBA_LOG_WARN, "Savestate created using a differently sized version of the ROM");
error = true;
}
if (error) {
return false;
}
memcpy(gba->cpu->gprs, state->cpu.gprs, sizeof(gba->cpu->gprs));
gba->cpu->cpsr = state->cpu.cpsr;
gba->cpu->spsr = state->cpu.spsr;
gba->cpu->cycles = state->cpu.cycles;
gba->cpu->nextEvent = state->cpu.nextEvent;
memcpy(gba->cpu->bankedRegisters, state->cpu.bankedRegisters, 6 * 7 * sizeof(int32_t));
memcpy(gba->cpu->bankedSPSRs, state->cpu.bankedSPSRs, 6 * sizeof(int32_t));
gba->cpu->privilegeMode = gba->cpu->cpsr.priv;
gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
if (state->biosPrefetch) {
gba->memory.biosPrefetch = state->biosPrefetch;
}
if (gba->cpu->cpsr.t) {
gba->cpu->executionMode = MODE_THUMB;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
gba->cpu->prefetch[0] = state->cpuPrefetch[0] & 0xFFFF;
gba->cpu->prefetch[1] = state->cpuPrefetch[1] & 0xFFFF;
} else {
// Maintain backwards compat
LOAD_16(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_16(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
} else {
gba->cpu->executionMode = MODE_ARM;
if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
gba->cpu->prefetch[0] = state->cpuPrefetch[0];
gba->cpu->prefetch[1] = state->cpuPrefetch[1];
} else {
// Maintain backwards compat
LOAD_32(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
LOAD_32(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
}
}
GBAMemoryDeserialize(&gba->memory, state);
GBAIODeserialize(gba, state);
GBAVideoDeserialize(&gba->video, state);
GBAAudioDeserialize(&gba->audio, state);
GBASavedataDeserialize(&gba->memory.savedata, state, false);
if (gba->rr) {
gba->rr->stateLoaded(gba->rr, state);
}
return true;
}
bool GBACheatAddCodeBreaker(struct GBACheatSet* cheats, uint32_t op1, uint16_t op2) {
char line[14] = "XXXXXXXX XXXX";
snprintf(line, sizeof(line), "%08X %04X", op1, op2);
GBACheatRegisterLine(cheats, line);
enum GBACodeBreakerType type = op1 >> 28;
struct GBACheat* cheat = 0;
if (cheats->incompleteCheat) {
cheats->incompleteCheat->repeat = op1 & 0xFFFF;
cheats->incompleteCheat->addressOffset = op2;
cheats->incompleteCheat->operandOffset = 0;
cheats->incompleteCheat = 0;
return true;
}
switch (type) {
case CB_GAME_ID:
// TODO: Run checksum
return true;
case CB_HOOK:
if (cheats->hook) {
return false;
}
cheats->hook = malloc(sizeof(*cheats->hook));
cheats->hook->address = BASE_CART0 | (op1 & (SIZE_CART0 - 1));
cheats->hook->mode = MODE_THUMB;
cheats->hook->refs = 1;
cheats->hook->reentries = 0;
return true;
case CB_OR_2:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_OR;
cheat->width = 2;
break;
case CB_ASSIGN_1:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_ASSIGN;
cheat->width = 1;
break;
case CB_FILL:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_ASSIGN;
cheat->width = 2;
cheats->incompleteCheat = cheat;
break;
case CB_FILL_8:
GBALog(0, GBA_LOG_STUB, "[Cheat] CodeBreaker code %08X %04X not supported", op1, op2);
return false;
case CB_AND_2:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_AND;
cheat->width = 2;
break;
case CB_IF_EQ:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_EQ;
cheat->width = 2;
break;
case CB_ASSIGN_2:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_ASSIGN;
cheat->width = 2;
break;
case CB_ENCRYPT:
GBALog(0, GBA_LOG_STUB, "[Cheat] CodeBreaker encryption not supported");
return false;
case CB_IF_NE:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_NE;
cheat->width = 2;
break;
case CB_IF_GT:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_GT;
cheat->width = 2;
break;
case CB_IF_LT:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_LT;
cheat->width = 2;
break;
case CB_IF_SPECIAL:
switch (op1 & 0x0FFFFFFF) {
case 0x20:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_AND;
cheat->width = 2;
cheat->address = BASE_IO | REG_JOYSTAT;
cheat->operand = op2;
cheat->repeat = 1;
return true;
default:
GBALog(0, GBA_LOG_STUB, "[Cheat] CodeBreaker code %08X %04X not supported", op1, op2);
return false;
}
case CB_ADD_2:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_ADD;
cheat->width = 2;
break;
case CB_IF_AND:
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_AND;
cheat->width = 2;
break;
}
cheat->address = op1 & 0x0FFFFFFF;
cheat->operand = op2;
cheat->repeat = 1;
cheat->negativeRepeat = 0;
return true;
}
void _rtcReadPins(struct GBACartridgeHardware* hw) {
// Transfer sequence:
// P: 0 | 1 | 2 | 3
// == Initiate
// > HI | - | LO | -
// > HI | - | HI | -
// == Transfer bit (x8)
// > LO | x | HI | -
// > HI | - | HI | -
// < ?? | x | ?? | -
// == Terminate
// > - | - | LO | -
switch (hw->rtc.transferStep) {
case 0:
if ((hw->pinState & 5) == 1) {
hw->rtc.transferStep = 1;
}
break;
case 1:
if ((hw->pinState & 5) == 5) {
hw->rtc.transferStep = 2;
}
break;
case 2:
if (!hw->p0) {
hw->rtc.bits &= ~(1 << hw->rtc.bitsRead);
hw->rtc.bits |= hw->p1 << hw->rtc.bitsRead;
} else {
if (hw->p2) {
// GPIO direction should always != reading
if (hw->dir1) {
if (hw->rtc.command.reading) {
GBALog(hw->p, GBA_LOG_GAME_ERROR, "Attempting to write to RTC while in read mode");
}
++hw->rtc.bitsRead;
if (hw->rtc.bitsRead == 8) {
_rtcProcessByte(hw);
}
} else {
_outputPins(hw, 5 | (_rtcOutput(hw) << 1));
++hw->rtc.bitsRead;
if (hw->rtc.bitsRead == 8) {
--hw->rtc.bytesRemaining;
if (hw->rtc.bytesRemaining <= 0) {
hw->rtc.commandActive = 0;
hw->rtc.command.reading = 0;
}
hw->rtc.bitsRead = 0;
}
}
} else {
hw->rtc.bitsRead = 0;
hw->rtc.bytesRemaining = 0;
hw->rtc.commandActive = 0;
hw->rtc.command.reading = 0;
hw->rtc.transferStep = 0;
}
}
break;
}
}