54 lines
1.1 KiB
C#
54 lines
1.1 KiB
C#
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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public class Mapper191 : MMC3Board_Base
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{
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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//analyze board type
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switch (Cart.board_type)
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{
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case "MAPPER191":
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break;
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default:
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return false;
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}
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throw new InvalidOperationException("THIS MAPPER ISNT TESTED! WHAT GAME USES IT? PLEASE REPORT!");
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//this board has 2k of chr ram
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Cart.vram_size = 2;
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BaseSetup();
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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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if (addr > 0x2000) return base.ReadPPU(addr);
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int bank_1k = Get_CHRBank_1K(addr);
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if (bank_1k.Bit(7))
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{
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//this is referencing chr ram
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return VRAM[addr & 0x7FF];
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}
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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 > 0x2000) base.WritePPU(addr,value);
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int bank_1k = Get_CHRBank_1K(addr);
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if (bank_1k.Bit(7))
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{
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//this is referencing chr ram
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VRAM[addr & 0x7FF] = value;
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}
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else base.WritePPU(addr, value);
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}
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}
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} |