private void ControllerView_ReadHeader(object sender, RoutedEventArgs e)
{
if (!_state.IsOpen)
{
return;
}
_header = _controller.ReadGameboyHeader();
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(_header)));
}
public async Task ReadROMAsync(CartridgeHeader header, StorageFolder saveLocation)
{
var contentBuffer = new List <byte>();
var currentAddress = 0x0000;
var targetAddress = 0x7FFF;
_serial.DiscardInBuffer();
_serial.DiscardOutBuffer();
SetMode(Constants.COMMAND_RESET);
SetMode(Constants.COMMAND_SET_START_ADDRESS, currentAddress);
SetMode(Constants.COMMAND_READ_ROM_RAM);
for (ushort bank = 1; bank < header.RomBanks; bank++)
{
if (header.RomBanks > 2)
{
// MBC2 and larger
if ((byte)header.Mapper >= 5)
{
SetBank(0x2100, bank);
if (bank >= 256)
{
// Handle high bit(s)
SetBank(0x3000, 1);
}
}
else
{
// Set the mode
SetBank(0x6000, 0);
// Set 0b01100000
SetBank(0x4000, (ushort)(bank >> 5));
// Set 0b00011111
SetBank(0x2000, (ushort)(bank & 0x1F));
}
}
if (bank > 1)
{
currentAddress = 0x4000;
}
SetMode(Constants.COMMAND_SET_START_ADDRESS, currentAddress);
SetMode(Constants.COMMAND_READ_ROM_RAM);
var currentBuffer = new byte[0xFFFF];
while (currentAddress < targetAddress)
{
try
{
var numberRead = _serial.Read(currentBuffer, currentAddress, 64);
currentAddress += numberRead;
if (currentAddress < targetAddress)
{
SetMode(Constants.COMMAND_CONTINUE);
}
}
catch (TimeoutException)
{
Debug.WriteLine("Bytes not ready!");
Thread.Sleep(500);
SetMode(Constants.COMMAND_SET_START_ADDRESS, (byte)currentAddress);
SetMode(Constants.COMMAND_READ_ROM_RAM);
continue;
}
catch (Exception ex)
{
Debug.WriteLine("Unable to complete read!");
}
}
if (bank > 1)
{
var segment = new ArraySegment <byte>(currentBuffer, 0x4000, 0x8000 - 0x4000);
contentBuffer.AddRange(segment);
}
else
{
contentBuffer.AddRange(currentBuffer);
}
}
try
{
var safeTitle = header.Title.Replace('\0', ' ');
var saveFile = await saveLocation.CreateFileAsync($"{safeTitle}.gb", CreationCollisionOption.ReplaceExisting);
using (var transaction = await saveFile.OpenTransactedWriteAsync())
using (var dataWriter = new DataWriter(transaction.Stream))
{
dataWriter.WriteBytes(contentBuffer.ToArray());
await dataWriter.StoreAsync();
await transaction.CommitAsync();
}
}
catch (Exception ex)
{
Debug.WriteLine("Unable to save file!");
}
SetMode(0);
}