public void Write(ushort PC, byte data)
{
//RAM Enabled and ROM Bank Number
if (PC >= 0x0000 && PC <= 0x3FFF)
{
byte bit8 = (byte)(GameBoyCPU.getBitFromWord(8, PC));
if (bit8 != 1)
{
byte mask = (byte)(data & 0x0F);
bool prevRamState = ramEnable;
ramEnable = (mask == 0x0A) ? true : false;
//Went from true to false
if (prevRamState && !ramEnable && battery)
{
save();
}
}
else
{
bank1 = (byte)(data & 0x0F);
if (bank1 == 0)
{
bank1 = 1;
}
}
}
else if (PC >= 0xA000 && PC <= 0xBFFF)
{
if (ramEnable)
{
byte newData = (byte)(data & 0x0F);
int offset = PC - 0xA000;
ramMemory[offset % 512] = data;
}
}
}
public bool WriteToMemory(ushort address, byte data)
{
if (address >= 0x0000 && address <= 0x7FFF)
{
gbCart.Write(address, data);
}
else if (address >= 0x8000 && address <= 0x9FFF)
{
gbGraphic.Write(address, data);
}
else if (address == GameBoyTimer.DIV)
{
uint rate = (byte)(memory[GameBoyTimer.TAC] & 0x3);
byte divValue = memory[GameBoyTimer.DIV];
//Failing Edge detector... don't know if this is correct
if (rate == 0 && GameBoyCPU.getBitFromWord(9, gbTimer.TIMACycleCount) == 1)
{
gbTimer.IncrementTIMACheck();
}
else if (rate == 1 && GameBoyCPU.getBitFromWord(3, gbTimer.TIMACycleCount) == 1)
{
gbTimer.IncrementTIMACheck();
}
else if (rate == 2 && GameBoyCPU.getBitFromWord(5, gbTimer.TIMACycleCount) == 1)
{
gbTimer.IncrementTIMACheck();
}
else if (rate == 3 && GameBoyCPU.getBitFromWord(7, gbTimer.TIMACycleCount) == 1)
{
gbTimer.IncrementTIMACheck();
}
memory[GameBoyTimer.DIV] = 0;
gbTimer.resetTimer();
}
else if (address == GameBoyTimer.TIMA)
{
//if(!gbTimer.isReloadingTIMA()) {
memory[GameBoyTimer.TIMA] = data;
//}
}
else if (address >= 0xA000 && address <= 0xBFFF)
{
gbCart.Write(address, data);
}
else if (address == GameBoyGraphic.LYAddr)
{
memory[address] = 0;
gbGraphic.resetWindowLine();
}
else if (address >= 0xC000 && address <= 0xFDFF)
{
workRam.Write(address, data);
}
else if (address == DMA)
{
DMATransfer(data);
}
else if ((address == 0xFF4F || (address >= 0xFF51 && address <= 0xFF55) ||
(address >= 0xFF68 && address <= 0xFF6B)) & GameBoyCartiridge.IsGameBoyColor)
{
gbGraphic.Write(address, data);
}
else if (address >= 0xFF01 && address <= 0xFF02)
{
Debug.Log("Link Port");
}
else if (address >= 0xFF10 && address <= 0xFF3F)
{
gbAudio.Write(address, data);
}
else if (address == GameBoyGraphic.STATAddr)
{
memory[address] = (byte)((memory[address] & 0x7) | (data & 0xF8));
}
else if (address == 0xFF70 && GameBoyCartiridge.IsGameBoyColor)
{
workRam.Write(address, data);
}
else if (address == KEY1)
{
data = (byte)(data & 0x7f);
memory[address] = data;
}
else
{
memory[address] = data;
}
return(true);
}