91 lines
1.9 KiB
C#
91 lines
1.9 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper075 Konami VRC1/Jaleco D65005 //
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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 Mapper075 : Mapper
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{
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BYTE[] reg = new byte[2];
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public Mapper075(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, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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if (VROM_8K_SIZE != 0)
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{
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SetVROM_8K_Bank(0);
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}
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reg[0] = 0;
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reg[1] = 1;
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}
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//void Mapper075::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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switch (addr & 0xF000)
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{
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case 0x8000:
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SetPROM_8K_Bank(4, data);
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break;
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case 0x9000:
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if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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reg[0] = (byte)((reg[0] & 0x0F) | ((data & 0x02) << 3));
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reg[1] = (byte)((reg[1] & 0x0F) | ((data & 0x04) << 2));
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SetVROM_4K_Bank(0, reg[0]);
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SetVROM_4K_Bank(4, reg[1]);
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break;
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case 0xA000:
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SetPROM_8K_Bank(5, data);
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break;
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case 0xC000:
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SetPROM_8K_Bank(6, data);
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break;
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case 0xE000:
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reg[0] = (byte)((reg[0] & 0x10) | (data & 0x0F));
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SetVROM_4K_Bank(0, reg[0]);
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break;
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case 0xF000:
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reg[1] = (byte)((reg[1] & 0x10) | (data & 0x0F));
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SetVROM_4K_Bank(4, reg[1]);
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break;
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}
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}
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//void Mapper075::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg[0];
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p[1] = reg[1];
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}
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//void Mapper075::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg[0] = p[0];
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reg[1] = 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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