// ---------------------------------
static public Cart Load(byte[] crtFile)
{
Cart result = null;
MemoryStream mem = new MemoryStream(crtFile);
BinaryReader reader = new BinaryReader(mem);
if (new string(reader.ReadChars(16)) == "C64 CARTRIDGE ")
{
List<int> chipAddress = new List<int>();
List<int> chipBank = new List<int>();
List<byte[]> chipData = new List<byte[]>();
List<int> chipType = new List<int>();
int headerLength = ReadCRTInt(reader);
int version = ReadCRTShort(reader);
int mapper = ReadCRTShort(reader);
bool exrom = (reader.ReadByte() != 0);
bool game = (reader.ReadByte() != 0);
// reserved
reader.ReadBytes(6);
// cartridge name
reader.ReadBytes(0x20);
// skip extra header bytes
if (headerLength > 0x40)
{
reader.ReadBytes(headerLength - 0x40);
}
// read chips
while (reader.PeekChar() >= 0)
{
if (new string(reader.ReadChars(4)) == "CHIP")
{
int chipLength = ReadCRTInt(reader);
chipType.Add(ReadCRTShort(reader));
chipBank.Add(ReadCRTShort(reader));
chipAddress.Add(ReadCRTShort(reader));
int chipDataLength = ReadCRTShort(reader);
chipData.Add(reader.ReadBytes(chipDataLength));
chipLength -= (chipDataLength + 0x10);
if (chipLength > 0)
reader.ReadBytes(chipLength);
}
}
if (chipData.Count > 0)
{
switch (mapper)
{
case 0x0000:
result = new Mapper0000(chipAddress, chipBank, chipData, game, exrom);
break;
case 0x0005:
result = new Mapper0005(chipAddress, chipBank, chipData);
break;
case 0x000B:
result = new Mapper000B(chipAddress, chipBank, chipData);
break;
case 0x000F:
result = new Mapper000F(chipAddress, chipBank, chipData);
break;
case 0x0011:
result = new Mapper0011(chipAddress, chipBank, chipData);
break;
case 0x0012:
result = new Mapper0012(chipAddress, chipBank, chipData);
break;
case 0x0013:
result = new Mapper0013(chipAddress, chipBank, chipData);
break;
case 0x0020:
result = new Mapper0020(chipAddress, chipBank, chipData);
break;
default:
throw new Exception("This cartridge file uses an unrecognized mapper: " + mapper);
}
result.HardReset();
}
}
return result;
}
// ---------------------------------
static public Cart Load(byte[] crtFile)
{
Cart result = null;
MemoryStream mem = new MemoryStream(crtFile);
BinaryReader reader = new BinaryReader(mem);
if (new string(reader.ReadChars(16)) == "C64 CARTRIDGE ")
{
List <int> chipAddress = new List <int>();
List <int> chipBank = new List <int>();
List <byte[]> chipData = new List <byte[]>();
List <int> chipType = new List <int>();
int headerLength = ReadCRTInt(reader);
int version = ReadCRTShort(reader);
int mapper = ReadCRTShort(reader);
bool exrom = (reader.ReadByte() != 0);
bool game = (reader.ReadByte() != 0);
// reserved
reader.ReadBytes(6);
// cartridge name
reader.ReadBytes(0x20);
// skip extra header bytes
if (headerLength > 0x40)
{
reader.ReadBytes(headerLength - 0x40);
}
// read chips
while (reader.PeekChar() >= 0)
{
if (new string(reader.ReadChars(4)) == "CHIP")
{
int chipLength = ReadCRTInt(reader);
chipType.Add(ReadCRTShort(reader));
chipBank.Add(ReadCRTShort(reader));
chipAddress.Add(ReadCRTShort(reader));
int chipDataLength = ReadCRTShort(reader);
chipData.Add(reader.ReadBytes(chipDataLength));
chipLength -= (chipDataLength + 0x10);
if (chipLength > 0)
{
reader.ReadBytes(chipLength);
}
}
}
if (chipData.Count > 0)
{
switch (mapper)
{
case 0x0000:
result = new Mapper0000(chipAddress, chipBank, chipData, game, exrom);
break;
case 0x0005:
result = new Mapper0005(chipAddress, chipBank, chipData);
break;
case 0x000B:
result = new Mapper000B(chipAddress, chipBank, chipData);
break;
case 0x000F:
result = new Mapper000F(chipAddress, chipBank, chipData);
break;
case 0x0011:
result = new Mapper0011(chipAddress, chipBank, chipData);
break;
case 0x0012:
result = new Mapper0012(chipAddress, chipBank, chipData);
break;
case 0x0013:
result = new Mapper0013(chipAddress, chipBank, chipData);
break;
case 0x0020:
result = new Mapper0020(chipAddress, chipBank, chipData);
break;
default:
throw new Exception("This cartridge file uses an unrecognized mapper: " + mapper);
}
result.HardReset();
}
}
return(result);
}
