AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper022.cs
2024-08-05 01:33:07 +08:00

82 lines
1.6 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper022 Konami VRC2 type A //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper022 : Mapper
{
public Mapper022(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
}
//void Mapper022::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
switch (addr)
{
case 0x8000:
SetPROM_8K_Bank(4, data);
break;
case 0x9000:
data &= 0x03;
if (data == 0) SetVRAM_Mirror(VRAM_VMIRROR);
else if (data == 1) SetVRAM_Mirror(VRAM_HMIRROR);
else if (data == 2) SetVRAM_Mirror(VRAM_MIRROR4H);
else SetVRAM_Mirror(VRAM_MIRROR4L);
break;
case 0xA000:
SetPROM_8K_Bank(5, data);
break;
case 0xB000:
SetVROM_1K_Bank(0, data >> 1);
break;
case 0xB001:
SetVROM_1K_Bank(1, data >> 1);
break;
case 0xC000:
SetVROM_1K_Bank(2, data >> 1);
break;
case 0xC001:
SetVROM_1K_Bank(3, data >> 1);
break;
case 0xD000:
SetVROM_1K_Bank(4, data >> 1);
break;
case 0xD001:
SetVROM_1K_Bank(5, data >> 1);
break;
case 0xE000:
SetVROM_1K_Bank(6, data >> 1);
break;
case 0xE001:
SetVROM_1K_Bank(7, data >> 1);
break;
}
}
}
}