62 lines
1.1 KiB
C#
62 lines
1.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Nintendo.NES
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{
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public sealed class Mapper188 : NES.NESBoardBase
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{
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// config
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int prg_16k_mask;
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// state
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int prg;
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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switch (Cart.board_type)
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{
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case "MAPPER188":
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AssertVram(8);
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AssertChr(0);
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AssertPrg(128, 256);
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Cart.wram_size = 0;
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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(Cart.pad_h, Cart.pad_v);
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prg_16k_mask = Cart.prg_size / 16 - 1;
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return true;
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}
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public override void WritePRG(int addr, byte value)
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{
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prg = value;
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}
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public override void SyncState(Serializer ser)
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{
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ser.Sync("prg", ref prg);
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base.SyncState(ser);
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}
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public override byte ReadPRG(int addr)
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{
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int bank = prg;
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if (addr >= 0x4000)
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bank = 15;
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bank ^= 8; // bad dumps?
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bank &= prg_16k_mask;
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return ROM[addr & 0x3fff | bank << 14];
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}
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public override byte ReadWRAM(int addr)
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{
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return 3;
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}
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}
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}
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