AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper235.cs

118 lines
3.8 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper235 150-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 Mapper235 : Mapper
{
public Mapper235(NES parent) : base(parent)
{
}
public override void Reset()
{
for (INT i = 0; i < 0x2000; i++)
{
DRAM[i] = 0xFF;
}
SetPROM_32K_Bank(0);
}
//void Mapper235::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
{
BYTE prg = (byte)(((addr & 0x0300) >> 3) | (addr & 0x001F));
BYTE bus = 0;
if (PROM_8K_SIZE == 64 * 2)
{
// 100-in-1
switch (addr & 0x0300)
{
case 0x0000: break;
case 0x0100: bus = 1; break;
case 0x0200: bus = 1; break;
case 0x0300: bus = 1; break;
}
}
else if (PROM_8K_SIZE == 128 * 2)
{
// 150-in-1
switch (addr & 0x0300)
{
case 0x0000: break;
case 0x0100: bus = 1; break;
case 0x0200: prg = (byte)((prg & 0x1F) | 0x20); break;
case 0x0300: bus = 1; break;
}
}
else if (PROM_8K_SIZE == 192 * 2)
{
// 150-in-1
switch (addr & 0x0300)
{
case 0x0000: break;
case 0x0100: bus = 1; break;
case 0x0200: prg = (byte)((prg & 0x1F) | 0x20); break;
case 0x0300: prg = (byte)((prg & 0x1F) | 0x40); break;
}
}
else if (PROM_8K_SIZE == 256 * 2)
{
}
if ((addr & 0x0800) != 0)
{
if ((addr & 0x1000) != 0)
{
SetPROM_8K_Bank(4, prg * 4 + 2);
SetPROM_8K_Bank(5, prg * 4 + 3);
SetPROM_8K_Bank(6, prg * 4 + 2);
SetPROM_8K_Bank(7, prg * 4 + 3);
}
else
{
SetPROM_8K_Bank(4, prg * 4 + 0);
SetPROM_8K_Bank(5, prg * 4 + 1);
SetPROM_8K_Bank(6, prg * 4 + 0);
SetPROM_8K_Bank(7, prg * 4 + 1);
}
}
else
{
SetPROM_32K_Bank(prg);
}
if (bus != 0)
{
SetPROM_Bank(4, DRAM, BANKTYPE_ROM);
SetPROM_Bank(5, DRAM, BANKTYPE_ROM);
SetPROM_Bank(6, DRAM, BANKTYPE_ROM);
SetPROM_Bank(7, DRAM, BANKTYPE_ROM);
}
if ((addr & 0x0400) != 0)
{
SetVRAM_Mirror(VRAM_MIRROR4L);
}
else if ((addr & 0x2000) != 0)
{
SetVRAM_Mirror(VRAM_HMIRROR);
}
else
{
SetVRAM_Mirror(VRAM_VMIRROR);
}
}
}
}
}