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