AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper135.cs
2024-08-04 00:32:14 +08:00

114 lines
3.6 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper135 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 Mapper135 : Mapper
{
BYTE cmd;
BYTE chr0l, chr1l, chr0h, chr1h, chrch;
public Mapper135(NES parent) : base(parent)
{
}
public override void Reset()
{
cmd = 0;
chr0l = chr1l = chr0h = chr1h = chrch = 0;
SetPROM_32K_Bank(0);
SetBank_PPU();
}
//void Mapper135::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:
chr0l = (byte)(data & 0x07);
SetBank_PPU();
break;
case 1:
chr0h = (byte)(data & 0x07);
SetBank_PPU();
break;
case 2:
chr1l = (byte)(data & 0x07);
SetBank_PPU();
break;
case 3:
chr1h = (byte)(data & 0x07);
SetBank_PPU();
break;
case 4:
chrch = (byte)(data & 0x07);
SetBank_PPU();
break;
case 5:
SetPROM_32K_Bank((byte)(data & 0x07));
break;
case 6:
break;
case 7:
switch ((data >> 1) & 0x03)
{
case 0: SetVRAM_Mirror(VRAM_MIRROR4L); break;
case 1: SetVRAM_Mirror(VRAM_HMIRROR); break;
case 2: SetVRAM_Mirror(VRAM_VMIRROR); break;
case 3: SetVRAM_Mirror(VRAM_MIRROR4L); break;
}
break;
}
break;
}
CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
}
void SetBank_PPU()
{
SetVROM_2K_Bank(0, 0 | (chr0l << 1) | (chrch << 4));
SetVROM_2K_Bank(2, 1 | (chr0h << 1) | (chrch << 4));
SetVROM_2K_Bank(4, 0 | (chr1l << 1) | (chrch << 4));
SetVROM_2K_Bank(6, 1 | (chr1h << 1) | (chrch << 4));
}
//void Mapper135::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = cmd;
p[1] = chr0l;
p[2] = chr0h;
p[3] = chr1l;
p[4] = chr1h;
p[5] = chrch;
}
//void Mapper135::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
cmd = p[0];
chr0l = p[1];
chr0h = p[2];
chr0l = p[3];
chr0h = p[4];
chrch = p[5];
}
}
}