AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper191.cs
2024-08-03 23:15:19 +08:00

139 lines
4.1 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper191 SACHEN Super Cartridge Xin1 (Ver.1-9) //
// SACHEN Q-BOY Support //
//////////////////////////////////////////////////////////////////////////
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 Mapper191 : Mapper
{
BYTE[] reg = new BYTE[8];
BYTE prg0, prg1;
BYTE chr0, chr1, chr2, chr3;
BYTE highbank;
public Mapper191(NES parent) : base(parent)
{
}
public override void Reset()
{
for (INT i = 0; i < 8; i++)
{
reg[i] = 0x00;
}
prg0 = 0;
// prg1 = 1;
SetBank_CPU();
chr0 = 0;
chr1 = 0;
chr2 = 0;
chr3 = 0;
highbank = 0;
SetBank_PPU();
}
//void Mapper191::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
switch (addr)
{
case 0x4100:
reg[0] = data;
break;
case 0x4101:
reg[1] = data;
switch (reg[0])
{
case 0:
chr0 = (byte)(data & 7);
SetBank_PPU();
break;
case 1:
chr1 = (byte)(data & 7);
SetBank_PPU();
break;
case 2:
chr2 = (byte)(data & 7);
SetBank_PPU();
break;
case 3:
chr3 = (byte)(data & 7);
SetBank_PPU();
break;
case 4:
highbank = (byte)(data & 7);
SetBank_PPU();
break;
case 5:
prg0 = (byte)(data & 7);
SetBank_CPU();
break;
case 7:
if ((data & 0x02) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
break;
}
break;
}
}
void SetBank_CPU()
{
SetPROM_32K_Bank(prg0);
}
void SetBank_PPU()
{
if (VROM_1K_SIZE != 0)
{
SetVROM_1K_Bank(0, (((highbank << 3) + chr0) << 2) + 0);
SetVROM_1K_Bank(1, (((highbank << 3) + chr0) << 2) + 1);
SetVROM_1K_Bank(2, (((highbank << 3) + chr1) << 2) + 2);
SetVROM_1K_Bank(3, (((highbank << 3) + chr1) << 2) + 3);
SetVROM_1K_Bank(4, (((highbank << 3) + chr2) << 2) + 0);
SetVROM_1K_Bank(5, (((highbank << 3) + chr2) << 2) + 1);
SetVROM_1K_Bank(6, (((highbank << 3) + chr3) << 2) + 2);
SetVROM_1K_Bank(7, (((highbank << 3) + chr3) << 2) + 3);
}
}
public override bool IsStateSave()
{
return true;
}
//void Mapper191::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = prg0;
p[1] = chr0;
p[2] = chr1;
p[3] = chr2;
p[4] = chr3;
p[5] = highbank;
}
//void Mapper191::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
prg0 = p[0];
chr0 = p[1];
chr1 = p[2];
chr2 = p[3];
chr3 = p[4];
highbank = p[5];
}
}
}