AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper226.cs

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2024-08-03 22:26:53 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper226 76-in-1 //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using System;
using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper226 : Mapper
{
BYTE[] reg = new byte[2];
public Mapper226(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0);
reg[0] = 0;
reg[1] = 0;
}
//void Mapper226::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
if ((addr & 0x001) != 0)
{
reg[1] = data;
}
else
{
reg[0] = data;
}
if ((reg[0] & 0x40) != 0)
{
SetVRAM_Mirror(VRAM_VMIRROR);
}
else
{
SetVRAM_Mirror(VRAM_HMIRROR);
}
BYTE bank = (byte)(((reg[0] & 0x1E) >> 1) | ((reg[0] & 0x80) >> 3) | ((reg[1] & 0x01) << 5));
if ((reg[0] & 0x20) != 0)
{
if ((reg[0] & 0x01) != 0)
{
SetPROM_8K_Bank(4, bank * 4 + 2);
SetPROM_8K_Bank(5, bank * 4 + 3);
SetPROM_8K_Bank(6, bank * 4 + 2);
SetPROM_8K_Bank(7, bank * 4 + 3);
}
else
{
SetPROM_8K_Bank(4, bank * 4 + 0);
SetPROM_8K_Bank(5, bank * 4 + 1);
SetPROM_8K_Bank(6, bank * 4 + 0);
SetPROM_8K_Bank(7, bank * 4 + 1);
}
}
else
{
SetPROM_8K_Bank(4, bank * 4 + 0);
SetPROM_8K_Bank(5, bank * 4 + 1);
SetPROM_8K_Bank(6, bank * 4 + 2);
SetPROM_8K_Bank(7, bank * 4 + 3);
}
}
public override bool IsStateSave()
{
return true;
}
//void Mapper226::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg[0];
p[1] = reg[1];
}
//void Mapper226::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg[0] = p[0];
reg[1] = p[1];
}
}
}