using BizHawk.Common; namespace BizHawk.Emulation.Cores.Nintendo.NES { internal sealed class Mapper120 : NesBoardBase { //Used by Tobidase Daisakusen (FDS Conversion). Undocumented by Disch docs, this implementation is based on FCEUX byte prg_reg; public override bool Configure(EDetectionOrigin origin) { switch (Cart.BoardType) { case "MAPPER120": break; default: return false; } SetMirrorType(EMirrorType.Vertical); return true; } public override void SyncState(Serializer ser) { ser.Sync(nameof(prg_reg), ref prg_reg); base.SyncState(ser); } public override void WriteExp(int addr, byte value) { if (addr == 0x01FF) { prg_reg = (byte)(value & 0x07); } } public override byte ReadWram(int addr) { return Rom[((prg_reg & 7) * 0x2000) + (addr & 0x1FFF)]; } public override byte ReadPrg(int addr) { return Rom[0x10000 + addr]; } } }