64 lines
1.4 KiB
C#
64 lines
1.4 KiB
C#
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using System;
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using System.IO;
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using System.Diagnostics;
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namespace BizHawk.Emulation.Consoles.Nintendo
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{
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/*
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Registers:
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---------------------------
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I do not know whether or not this mapper suffers from bus conflicts. Use caution!
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$8000-FFFF: [PPPP PPP.]
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[CCCC CCCC]
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P = Selects 32k PRG @ $8000
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C = Selects 8k CHR @ $0000
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This is very strange. Bits 1-7 seem to be used by both CHR and PRG.
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Games:
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Magic Dragon
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*/
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class Mapper107 : NES.NESBoardBase
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{
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int prg, chr;
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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//configure
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switch (Cart.board_type)
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{
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case "Mapper107":
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break;
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default:
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return false;
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}
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return true;
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}
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public override byte ReadPPU(int addr)
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{
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return VRAM[addr + (chr * 0x2000)];
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}
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public override byte ReadPRG(int addr)
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{
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return VROM[addr + (prg * 0x8000)];
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}
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public override void WriteWRAM(int addr, byte value)
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{
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chr = value;
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prg = addr >> 1;
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base.WriteWRAM(addr, value);
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}
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public override void SyncState(Serializer ser)
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{
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base.SyncState(ser);
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ser.Sync("prg", ref prg);
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ser.Sync("chr", ref chr);
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}
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}
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}
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