abstract Rom

type InesHeader
    PrgRomSize::UInt8
    ChrRomSize::UInt8
    IgnoreMirror::Bool
    Trainer::Bool
    HasBatteryRam::Bool
    Mirror::Bool
    IsNES2Format::Bool
    Arcade2::Bool
    Arcade1::Bool
    PrgRamSize::UInt8
    TVSystem::Bool
    BusConflict::Bool
    PrgRam::Bool
    TVSystem2::UInt8
    Mapper::UInt8
end
type Ines <: Rom
    Header::InesHeader
    Rom::Array{UInt8,1}
    Ines(file::String) = begin
        rom = Mmap.mmap(file)
        PrgRomSize = rom[5]*16,
        ChrRomSize = rom[6]*8,
        IgnoreMirror = Bool(rom[7] & 0b00001000),
        Trainer = Bool(rom[7] & 0b00000100),
        HasBatteryRam = Bool(rom[7] & 0b00000010),
        Mirror = Bool(rom[7] & 0b00000001),
        IsNES2Format = if ((rom[8] & 0b00001100) >> 2) == 2
            true
        else
            false
        end,
        Arcade2 = Bool(rom[8] * 0b00000010),
        Arcade1 = Bool(rom[8] * 0b00000001),
        PrgRamSize = rom[9] * 8,
        TVSystem = Bool(rom[10] & 0x1),
        BusConflict = Bool(rom[11] & 0b00100000),
        PrgRam = Bool(rom[11] & 0b00010000),
        TVSystem2 = rom[11] & 0x3,
        Mapper = (rom[7] & 0b11110000) | (rom[8] & 0b00001111)
        contents = rom[17:end]
        new(InesHeader(PrgRomSize, ChrRomSize, IgnoreMirror, Trainer, HasBatteryRam, Mirror, IsNES2Format, Arcade2, Arcade1, PrgRamSize, TVSystem, BusConflict, PrgRam, TVSystem2, Mapper), contents)
    end
end
test_rom = Ines("/home/john/Code/ksy/specimens/ines/2600\ Bros\ (SMB1\ Hack).nes")