AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper227.cs

75 lines
2.2 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper227 1200-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 Mapper227 : Mapper
{
public Mapper227(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, 0, 1);
}
//void Mapper227::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
BYTE bank = (byte)(((addr & 0x0100) >> 4) | ((addr & 0x0078) >> 3));
if ((addr & 0x0001) != 0)
{
SetPROM_32K_Bank(bank);
}
else
{
if ((addr & 0x0004) != 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);
}
}
if (!((addr & 0x0080) != 0))
{
if ((addr & 0x0200) != 0)
{
SetPROM_8K_Bank(6, (bank & 0x1C) * 4 + 14);
SetPROM_8K_Bank(7, (bank & 0x1C) * 4 + 15);
}
else
{
SetPROM_8K_Bank(6, (bank & 0x1C) * 4 + 0);
SetPROM_8K_Bank(7, (bank & 0x1C) * 4 + 1);
}
}
if ((addr & 0x0002) != 0)
{
SetVRAM_Mirror(VRAM_HMIRROR);
}
else
{
SetVRAM_Mirror(VRAM_VMIRROR);
}
}
}
}