77 lines
2.2 KiB
C#
77 lines
2.2 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper230 22-in-1 //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using static VirtualNes.Core.CPU;
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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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using Codice.CM.Client.Differences;
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namespace VirtualNes.Core
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{
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public class Mapper230 : Mapper
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{
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BYTE rom_sw;
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public Mapper230(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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if (rom_sw != 0)
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{
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rom_sw = 0;
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}
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else
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{
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rom_sw = 1;
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}
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if (rom_sw != 0)
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{
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SetPROM_32K_Bank(0, 1, 14, 15);
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}
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else
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{
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SetPROM_32K_Bank(16, 17, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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}
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}
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//void Mapper230::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 (rom_sw != 0)
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{
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SetPROM_8K_Bank(4, (data & 0x07) * 2 + 0);
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SetPROM_8K_Bank(5, (data & 0x07) * 2 + 1);
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}
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else
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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 + 16);
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SetPROM_8K_Bank(5, (data & 0x1F) * 2 + 17);
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SetPROM_8K_Bank(6, (data & 0x1F) * 2 + 16);
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SetPROM_8K_Bank(7, (data & 0x1F) * 2 + 17);
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}
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else
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{
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SetPROM_8K_Bank(4, (data & 0x1E) * 2 + 16);
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SetPROM_8K_Bank(5, (data & 0x1E) * 2 + 17);
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SetPROM_8K_Bank(6, (data & 0x1E) * 2 + 18);
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SetPROM_8K_Bank(7, (data & 0x1E) * 2 + 19);
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}
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if ((data & 0x40) != 0)
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{
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SetVRAM_Mirror(VRAM_VMIRROR);
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}
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else
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{
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SetVRAM_Mirror(VRAM_HMIRROR);
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}
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}
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}
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}
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}
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