/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="rom"></param>
public Nes(byte[] rom)
{
this.Cartridge = NesCartridge.Load(rom);
this.Controller = new NesGameController();
this.Ppu = new Ppu.NesPpu(this.Cartridge.GetCopyChrRom1(), this.Cartridge.GetCopyChrRom2(), this.Cartridge.IsHMirror, this.Cartridge.IsVMirror, x => this.Image = x);
this.MemoryMap = new Cpu.NesCpuMemoryMap(this.Cartridge.GetCopyPgRom1(), this.Cartridge.GetCopyPgRom2(), this.Ppu,this.Controller);
this.Cpu = new Cpu.NesCpu(this.MemoryMap, this.Ppu);
}
/// <summary>
/// カートリッジ情報を取得
/// </summary>
/// <param name="rom"></param>
/// <returns></returns>
public static NesCartridge Load(byte[] rom)
{
var cartridge = new NesCartridge();
var header = rom.Take(16).ToArray();
if (!(header[0] ==78 && header[1] == 69 && header[2] == 83))
{
throw new ArgumentException();
}
var programRomPageCount = header[4];
var characterRomPageCount = header[5];
var isHMirror = (header[6] & (byte)0x01) == 0;
var isVMirror = (header[6] & (byte)0x01) != 0;
cartridge.IsHMirror = isHMirror;
cartridge.IsVMirror = isVMirror;
if (programRomPageCount == 1)
{
cartridge.ProgramRom1 = rom.Skip(16).Take(16384).ToArray();
cartridge.ProgramRom2 = cartridge.ProgramRom1;
}
else
{
var roms = rom.Skip(16).Buffer(16384).Take(2).ToArray();
cartridge.ProgramRom1 = roms[0];
cartridge.ProgramRom2 = roms[1];
}
{
var roms = rom.Skip(programRomPageCount * 16384 + 16).Buffer(4096).Take(2).ToArray();
cartridge.CharacterRom1 = roms[0];
cartridge.CharacterRom2 = roms[1];
}
return cartridge;
}
