void writeByte(struct gameboy * gameboy, uint16_t address, uint8_t data)
{
//0000-8000 is read only
if (address < CARTRIDGE_SIZE){
handleBankWrite(gameboy, address, data);
}
//anything written to echo RAM should be written to work RAM.
else if ((address >= ECHO_RAM_START_UPPER) && (address < ECHO_RAM_END_UPPER)){
gameboy->memory.mem[address] = data;
gameboy->memory.mem[address - ECHO_OFFSET] = data;
}
else if ((address >= ECHO_RAM_START_LOWER) && (address < ECHO_RAM_END_LOWER)){
gameboy->memory.mem[address] = data;
gameboy->memory.mem[address + ECHO_OFFSET] = data;
}
else if ((address >= RESTRICTED_START) && (address < RESTRICTED_END)){
//printf("sp: %x\n", gameboy->cpu.sp);
//printf("WriteMemory: address %x is within restricted memory %x - %x\n", address, RESTRICTED_START, RESTRICTED_END);
// fprintf(stderr, "WriteMemory: address %x is within restricted memory %x - %x\n", address, RESTRICTED_START, RESTRICTED_END);
//printDebugTrace(gameboy);
}
else if (address == TMC){
//the game is trying to change the timer controller
int currentFreq = getTimerFrequency(gameboy);
gameboy->memory.mem[TMC] = data;
int newFreq = getTimerFrequency(gameboy);
if (newFreq != currentFreq){
initialiseTimerCounter(gameboy);
}
}
else if (address == DIV_REG){
//any writes to the divider register resets it to 0
gameboy->memory.mem[DIV_REG] = 0;
}
else if (address == DMA_ADDRESS){
doDMATransfer(gameboy, data);
}
else if (address == CONTROL_REG){
gameboy->screen.control = data;
}
else if (address == CURRENT_SCANLINE){
//printf("resetting scanline\n");
gameboy->screen.currentScanline = 0;
}
else if (address == STATUS_REG){
gameboy->screen.status = data;
}
else {
gameboy->memory.mem[address] = data;
}
}
double CStatisticTimer::GetTime()
{
uint64 total = mTotal;
if (mRunning)
total += getTimer()-mStart;
return (double)((int64)(total/getTimerFrequency()));
}
uint64 CStatisticTimer::GetFraction(uint32 fraction)
{
uint64 total = mTotal;
if (mRunning)
total += getTimer()-mStart;
if (fraction == 0)
return total;
else
return total/(getTimerFrequency()/fraction);
}
