139 lines
4.1 KiB
C#
139 lines
4.1 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper191 SACHEN Super Cartridge Xin1 (Ver.1-9) //
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// SACHEN Q-BOY Support //
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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 Mapper191 : Mapper
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{
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BYTE[] reg = new BYTE[8];
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BYTE prg0, prg1;
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BYTE chr0, chr1, chr2, chr3;
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BYTE highbank;
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public Mapper191(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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for (INT i = 0; i < 8; i++)
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{
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reg[i] = 0x00;
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}
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prg0 = 0;
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// prg1 = 1;
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SetBank_CPU();
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chr0 = 0;
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chr1 = 0;
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chr2 = 0;
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chr3 = 0;
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highbank = 0;
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SetBank_PPU();
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}
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//void Mapper191::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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switch (addr)
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{
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case 0x4100:
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reg[0] = data;
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break;
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case 0x4101:
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reg[1] = data;
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switch (reg[0])
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{
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case 0:
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chr0 = (byte)(data & 7);
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SetBank_PPU();
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break;
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case 1:
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chr1 = (byte)(data & 7);
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SetBank_PPU();
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break;
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case 2:
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chr2 = (byte)(data & 7);
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SetBank_PPU();
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break;
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case 3:
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chr3 = (byte)(data & 7);
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SetBank_PPU();
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break;
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case 4:
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highbank = (byte)(data & 7);
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SetBank_PPU();
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break;
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case 5:
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prg0 = (byte)(data & 7);
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SetBank_CPU();
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break;
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case 7:
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if ((data & 0x02) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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break;
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}
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break;
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}
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}
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void SetBank_CPU()
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{
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SetPROM_32K_Bank(prg0);
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}
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void SetBank_PPU()
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{
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if (VROM_1K_SIZE != 0)
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{
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SetVROM_1K_Bank(0, (((highbank << 3) + chr0) << 2) + 0);
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SetVROM_1K_Bank(1, (((highbank << 3) + chr0) << 2) + 1);
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SetVROM_1K_Bank(2, (((highbank << 3) + chr1) << 2) + 2);
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SetVROM_1K_Bank(3, (((highbank << 3) + chr1) << 2) + 3);
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SetVROM_1K_Bank(4, (((highbank << 3) + chr2) << 2) + 0);
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SetVROM_1K_Bank(5, (((highbank << 3) + chr2) << 2) + 1);
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SetVROM_1K_Bank(6, (((highbank << 3) + chr3) << 2) + 2);
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SetVROM_1K_Bank(7, (((highbank << 3) + chr3) << 2) + 3);
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}
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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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//void Mapper191::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = prg0;
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p[1] = chr0;
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p[2] = chr1;
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p[3] = chr2;
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p[4] = chr3;
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p[5] = highbank;
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}
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//void Mapper191::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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prg0 = p[0];
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chr0 = p[1];
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chr1 = p[2];
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chr2 = p[3];
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chr3 = p[4];
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highbank = p[5];
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}
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}
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}
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