public Builder(BuildSettings settings)
{
this.settings = settings;
chipSize = settings.BankSize / 2;
cartSize = 0;
}
static public byte[] Build(BuildSettings settings, byte[] image)
{
using (MemoryStream mem = new MemoryStream())
{
Encoding enc = Encoding.GetEncoding(437);
BinaryWriterEx writer = new BinaryWriterEx(mem);
// id
writer.Write(enc.GetBytes("C64 CARTRIDGE "));
// header length
writer.WriteS((Int32)0x00000040);
// cartridge version
writer.WriteS((Int16)0x0100);
// hardware type
writer.WriteS((Int16)settings.Type);
// exrom line
writer.Write((byte)(settings.Exrom ? 0x01 : 0x00));
// game line
writer.Write((byte)(settings.Game ? 0x01 : 0x00));
// reserved
writer.Write(new byte[6]);
// cartridge name
byte[] name = enc.GetBytes(settings.Name);
Array.Resize(ref name, 0x20);
writer.Write(name);
// cartridge contents
int bankIndex = 0;
int bankSize = settings.BankSize;
int chipSize = settings.BankSize / settings.ChipsPerBank;
int chipIndex = 0;
int chipAddress;
int remaining = image.Length;
int chipsPerBank = 0x4000 / chipSize;
int imageOffset = 0;
while (remaining > 0)
{
bankIndex = (chipIndex / chipsPerBank);
chipAddress = 0x8000 | ((chipIndex % chipsPerBank) * chipSize);
// id
writer.Write(enc.GetBytes("CHIP"));
// packet length
writer.WriteS((Int32)(chipSize + 0x10));
// chip type
writer.WriteS((Int16)0x0002);
// bank number
writer.WriteS((Int16)bankIndex);
// load address
writer.WriteS((Int16)chipAddress);
// image size
writer.WriteS((Int16)chipSize);
// image data
writer.Flush();
mem.Write(image, imageOffset, chipSize);
imageOffset += chipSize;
mem.Flush();
remaining -= chipSize;
chipIndex++;
}
return(mem.ToArray());
}
}
