public static Cartridge FromFile(string path)
{
var cartridge = new Cartridge();
var rom = new ROM();
if (!File.Exists(path))
{
return(null);
}
var reader = File.OpenRead(path);
rom.nesTitle = reader.Nextbytes(4);
rom.numPRGPages = (byte)reader.ReadByte();
rom.numCHRPages = (byte)reader.ReadByte();
rom.flags6 = (byte)reader.ReadByte();
rom.flags7 = (byte)reader.ReadByte();
rom.endOfHeader = reader.Nextbytes(8);
//Check the third bit to check if the ROM has a trainer
if (Bit.Test(rom.flags6, 3))
{
//if the trainer is there, then it's 512 bytes long. Always.
rom.trainer = reader.Nextbytes(ROM.TrainerSize);
}
rom.prgROM = reader.Nextbytes((int)rom.numPRGPages * ROM.PrgPageSize);
rom.chrROM = reader.Nextbytes((int)rom.numCHRPages * ROM.ChrPageSize);
cartridge.Rom = rom;
cartridge.mapper = cartridge.GetMapperInstance(rom.mapper);
return(cartridge);
}
public bool LoadCartridge(string fileName)
{
var c = Cartridge.FromFile(fileName);
if (c == null)
{
return(false);
}
Bus.Cartridge = c;
return(true);
}
