46 lines
941 B
C#
46 lines
941 B
C#
using System;
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using System.Diagnostics;
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namespace BizHawk.Emulation.Consoles.Nintendo.Boards
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{
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//generally mapper3
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public class CPROM : NES.NESBoardBase
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{
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byte[] cram;
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int chr;
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public CPROM()
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{
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}
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public override void Initialize(NES.RomInfo romInfo, NES nes)
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{
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base.Initialize(romInfo, nes);
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cram = new byte[16*1024];
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}
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public override void WritePRG(int addr, byte value)
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{
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value = HandleNormalPRGConflict(addr,value);
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chr = value&3;
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}
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public override byte ReadPPU(int addr)
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{
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if (addr < 0x1000)
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return cram[addr];
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else if(addr<0x2000)
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return cram[addr-0x1000 + (chr<<12)];
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else return base.ReadPPU(addr);
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}
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public override void WritePPU(int addr, byte value)
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{
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if (addr < 0x1000)
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cram[addr] = value;
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else if (addr < 0x2000)
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cram[addr - 0x1000 + (chr << 12)] = value;
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else base.WritePPU(addr,value);
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}
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}
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} |