public static CartridgeDevice Load(byte[] crtFile)
{
using (var mem = new MemoryStream(crtFile))
{
var reader = new BinaryReader(mem);
if (new string(reader.ReadChars(16)) != "C64 CARTRIDGE ")
{
return null;
}
var chipAddress = new List<int>();
var chipBank = new List<int>();
var chipData = new List<int[]>();
var chipType = new List<int>();
var headerLength = ReadCRTInt(reader);
var version = ReadCRTShort(reader);
var mapper = ReadCRTShort(reader);
var exrom = reader.ReadByte() != 0;
var 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")
{
break;
}
var chipLength = ReadCRTInt(reader);
chipType.Add(ReadCRTShort(reader));
chipBank.Add(ReadCRTShort(reader));
chipAddress.Add(ReadCRTShort(reader));
var chipDataLength = ReadCRTShort(reader);
chipData.Add(reader.ReadBytes(chipDataLength).Select(x => (int)x).ToArray());
chipLength -= chipDataLength + 0x10;
if (chipLength > 0)
reader.ReadBytes(chipLength);
}
if (chipData.Count <= 0)
{
return null;
}
CartridgeDevice result;
switch (mapper)
{
case 0x0000: // Standard Cartridge
result = new Mapper0000(chipAddress, chipData, game, exrom);
break;
case 0x0001: // Action Replay (4.2 and up)
result = new Mapper0001(chipAddress, chipBank, chipData);
break;
case 0x0005: // Ocean
result = new Mapper0005(chipAddress, chipBank, chipData);
break;
case 0x000A: // Epyx FastLoad
result = new Mapper000A(chipData);
break;
case 0x000B: // Westermann Learning
result = new Mapper000B(chipAddress, chipData);
break;
case 0x000F: // C64 Game System / System 3
result = new Mapper000F(chipAddress, chipBank, chipData);
break;
case 0x0011: // Dinamic
result = new Mapper0011(chipAddress, chipBank, chipData);
break;
case 0x0012: // Zaxxon / Super Zaxxon
result = new Mapper0012(chipAddress, chipBank, chipData);
break;
case 0x0013: // Domark
result = new Mapper0013(chipAddress, chipBank, chipData);
break;
case 0x0020: // EasyFlash
result = new Mapper0020(chipAddress, chipBank, chipData);
break;
case 0x002B: // Prophet 64
result = new Mapper002B(chipAddress, chipBank, chipData);
break;
default:
throw new Exception("This cartridge file uses an unrecognized mapper: " + mapper);
}
result.HardReset();
return result;
}
}
// ---------------------------------
public static CartridgeDevice Load(byte[] crtFile)
{
var mem = new MemoryStream(crtFile);
var reader = new BinaryReader(mem);
if (new string(reader.ReadChars(16)) != "C64 CARTRIDGE ")
{
return null;
}
var chipAddress = new List<int>();
var chipBank = new List<int>();
var chipData = new List<int[]>();
var chipType = new List<int>();
var headerLength = ReadCRTInt(reader);
var version = ReadCRTShort(reader);
var mapper = ReadCRTShort(reader);
var exrom = reader.ReadByte() != 0;
var 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")
{
break;
}
var chipLength = ReadCRTInt(reader);
chipType.Add(ReadCRTShort(reader));
chipBank.Add(ReadCRTShort(reader));
chipAddress.Add(ReadCRTShort(reader));
var chipDataLength = ReadCRTShort(reader);
chipData.Add(reader.ReadBytes(chipDataLength).Select(x => (int)x).ToArray());
chipLength -= chipDataLength + 0x10;
if (chipLength > 0)
reader.ReadBytes(chipLength);
}
if (chipData.Count <= 0)
{
return null;
}
CartridgeDevice result;
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;
}