56 lines
1.2 KiB
C#
56 lines
1.2 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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namespace BizHawk.Emulation.Consoles.Nintendo
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{
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// mmc3 multi, PAL, "Super Mario Bros. / Tetris / Nintendo World Cup"
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public class Mapper037 : MMC3Board_Base
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{
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int exreg;
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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 "MAPPER037":
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case "PAL-ZZ":
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break;
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default:
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return false;
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}
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AssertPrg(256);
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AssertChr(256);
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BaseSetup();
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//mmc3.MMC3Type = ??
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exreg = 0;
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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("exreg", ref exreg);
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base.SyncState(ser);
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}
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public override void WriteWRAM(int addr, byte value)
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{
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if (!mmc3.wram_enable || mmc3.wram_write_protect)
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return;
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exreg = value & 7;
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mmc3.Sync(); // unneeded?
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}
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protected override int Get_CHRBank_1K(int addr)
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{
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return base.Get_CHRBank_1K(addr) | (exreg << 5 & 0x80);
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}
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protected override int Get_PRGBank_8K(int addr)
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{
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return (exreg << 2 & 0x10) | ((exreg & 3) == 3 ? 8 : 0) | (base.Get_PRGBank_8K(addr) & (exreg << 1 | 7));
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}
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}
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}
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