AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper096.cs
2024-08-04 23:37:02 +08:00

76 lines
1.4 KiB
C#

////////////////////////////////
// Mapper096 Bandai 74161 //
//////////////////////////////////////////////////////////////////////////
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 Mapper096 : Mapper
{
BYTE[] reg = new byte[2];
public Mapper096(NES parent) : base(parent)
{
}
public override void Reset()
{
reg[0] = reg[1] = 0;
SetPROM_32K_Bank(0, 1, 2, 3);
SetBank();
SetVRAM_Mirror(VRAM_MIRROR4L);
}
//void Mapper096::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
SetPROM_32K_Bank(data & 0x03);
reg[0] = (byte)((data & 0x04) >> 2);
SetBank();
}
public override void PPU_Latch(ushort addr)
{
if ((addr & 0xF000) == 0x2000)
{
reg[1] = (byte)((addr >> 8) & 0x03);
SetBank();
}
}
void SetBank()
{
SetCRAM_4K_Bank(0, reg[0] * 4 + reg[1]);
SetCRAM_4K_Bank(4, reg[0] * 4 + 0x03);
}
//void Mapper096::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg[0];
p[1] = reg[1];
}
//void Mapper096::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg[0] = p[0];
reg[1] = p[1];
}
public override bool IsStateSave()
{
return true;
}
}
}