110 lines
2.6 KiB
C#
110 lines
2.6 KiB
C#
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//////////////////////////////////////////////////////////////////////////
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// Mapper051 11-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 Mapper051 : Mapper
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{
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int mode, bank;
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public Mapper051(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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bank = 0;
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mode = 1;
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SetBank_CPU();
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SetCRAM_8K_Bank(0);
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}
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//void Mapper051::WriteLow(WORD addr, BYTE data)
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public override void WriteLow(ushort addr, byte data)
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{
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if (addr >= 0x6000)
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{
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mode = ((data & 0x10) >> 3) | ((data & 0x02) >> 1);
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SetBank_CPU();
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}
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}
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//void Mapper051::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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bank = (data & 0x0f) << 2;
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if (0xC000 <= addr && addr <= 0xDFFF)
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{
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mode = (mode & 0x01) | ((data & 0x10) >> 3);
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}
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SetBank_CPU();
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}
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void SetBank_CPU()
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{
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switch (mode)
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{
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case 0:
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SetVRAM_Mirror(VRAM_VMIRROR);
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SetPROM_8K_Bank(3, (bank | 0x2c | 3));
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SetPROM_8K_Bank(4, (bank | 0x00 | 0));
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SetPROM_8K_Bank(5, (bank | 0x00 | 1));
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SetPROM_8K_Bank(6, (bank | 0x0c | 2));
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SetPROM_8K_Bank(7, (bank | 0x0c | 3));
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break;
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case 1:
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SetVRAM_Mirror(VRAM_VMIRROR);
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SetPROM_8K_Bank(3, (bank | 0x20 | 3));
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SetPROM_8K_Bank(4, (bank | 0x00 | 0));
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SetPROM_8K_Bank(5, (bank | 0x00 | 1));
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SetPROM_8K_Bank(6, (bank | 0x00 | 2));
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SetPROM_8K_Bank(7, (bank | 0x00 | 3));
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break;
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case 2:
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SetVRAM_Mirror(VRAM_VMIRROR);
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SetPROM_8K_Bank(3, (bank | 0x2e | 3));
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SetPROM_8K_Bank(4, (bank | 0x02 | 0));
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SetPROM_8K_Bank(5, (bank | 0x02 | 1));
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SetPROM_8K_Bank(6, (bank | 0x0e | 2));
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SetPROM_8K_Bank(7, (bank | 0x0e | 3));
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break;
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case 3:
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SetVRAM_Mirror(VRAM_HMIRROR);
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SetPROM_8K_Bank(3, (bank | 0x20 | 3));
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SetPROM_8K_Bank(4, (bank | 0x00 | 0));
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SetPROM_8K_Bank(5, (bank | 0x00 | 1));
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SetPROM_8K_Bank(6, (bank | 0x00 | 2));
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SetPROM_8K_Bank(7, (bank | 0x00 | 3));
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break;
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}
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}
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//void Mapper051::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = (byte)mode;
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p[1] = (byte)bank;
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}
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//void Mapper051::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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mode = p[0];
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bank = p[1];
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}
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public override bool IsStateSave()
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{
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return true;
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}
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}
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}
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