63 lines
1.8 KiB
C#
63 lines
1.8 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper233 42-in-1 //
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//////////////////////////////////////////////////////////////////////////using static VirtualNes.MMU;
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using static VirtualNes.Core.CPU;
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using static VirtualNes.MMU;
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using INT = System.Int32;
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using BYTE = System.Byte;
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using System;
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namespace VirtualNes.Core
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{
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public class Mapper233 : Mapper
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{
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public Mapper233(NES parent) : base(parent)
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{
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}
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public override void Reset()
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{
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SetPROM_32K_Bank(0, 1, 2, 3);
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}
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//void Mapper233::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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if ((data & 0x20) != 0)
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{
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SetPROM_8K_Bank(4, (data & 0x1F) * 2 + 0);
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SetPROM_8K_Bank(5, (data & 0x1F) * 2 + 1);
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SetPROM_8K_Bank(6, (data & 0x1F) * 2 + 0);
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SetPROM_8K_Bank(7, (data & 0x1F) * 2 + 1);
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}
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else
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{
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BYTE bank = (byte)((data & 0x1E) >> 1);
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SetPROM_8K_Bank(4, bank * 4 + 0);
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SetPROM_8K_Bank(5, bank * 4 + 1);
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SetPROM_8K_Bank(6, bank * 4 + 2);
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SetPROM_8K_Bank(7, bank * 4 + 3);
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}
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if ((data & 0xC0) == 0x00)
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{
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SetVRAM_Mirror(0, 0, 0, 1);
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}
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else if ((data & 0xC0) == 0x40)
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{
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SetVRAM_Mirror(VRAM_VMIRROR);
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}
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else if ((data & 0xC0) == 0x80)
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{
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SetVRAM_Mirror(VRAM_HMIRROR);
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}
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else
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{
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SetVRAM_Mirror(VRAM_MIRROR4H);
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}
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}
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}
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}
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