AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper134.cs

87 lines
2.6 KiB
C#
Raw Normal View History

2024-08-04 00:32:14 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper133 SACHEN CHEN //
//////////////////////////////////////////////////////////////////////////
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 Mapper134 : Mapper
{
BYTE cmd, prg, chr;
public Mapper134(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0);
// SetPROM_16K_Bank( 6, 0 );
// SetPROM_16K_Bank( 6, 1 );
SetVROM_8K_Bank(0);
}
//void Mapper134::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
switch (addr & 0x4101)
{
case 0x4100:
cmd = (byte)(data & 0x07);
break;
case 0x4101:
switch (cmd)
{
case 0:
prg = 0;
chr = 3;
break;
case 4:
chr &= 0x3;
chr |= (byte)((data & 0x07) << 2);
break;
case 5:
prg = (byte)(data & 0x07);
break;
case 6:
chr &= 0x1C;
chr |= (byte)(data & 0x3);
break;
case 7:
if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
break;
}
break;
}
SetPROM_32K_Bank(prg);
// SetPROM_16K_Bank( 4, (prg<<1)|0 );
// SetPROM_16K_Bank( 6, (prg<<1)|1 );
SetVROM_8K_Bank(chr);
CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
}
//void Mapper134::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = cmd;
p[1] = prg;
p[2] = chr;
}
//void Mapper134::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
cmd = p[0];
prg = p[1];
chr = p[2];
}
}
}