AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper233.cs

60 lines
1.7 KiB
C#
Raw Normal View History

2024-08-03 22:26:53 +08:00
//////////////////////////////////////////////////////////////////////////
// Mapper233 42-in-1 //
//////////////////////////////////////////////////////////////////////////using static VirtualNes.MMU;
using static VirtualNes.MMU;
using BYTE = System.Byte;
namespace VirtualNes.Core
{
public class Mapper233 : Mapper
{
public Mapper233(NES parent) : base(parent)
{
}
public override void Reset()
{
SetPROM_32K_Bank(0, 1, 2, 3);
}
//void Mapper233::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
if ((data & 0x20) != 0)
{
SetPROM_8K_Bank(4, (data & 0x1F) * 2 + 0);
SetPROM_8K_Bank(5, (data & 0x1F) * 2 + 1);
SetPROM_8K_Bank(6, (data & 0x1F) * 2 + 0);
SetPROM_8K_Bank(7, (data & 0x1F) * 2 + 1);
}
else
{
BYTE bank = (byte)((data & 0x1E) >> 1);
SetPROM_8K_Bank(4, bank * 4 + 0);
SetPROM_8K_Bank(5, bank * 4 + 1);
SetPROM_8K_Bank(6, bank * 4 + 2);
SetPROM_8K_Bank(7, bank * 4 + 3);
}
if ((data & 0xC0) == 0x00)
{
SetVRAM_Mirror(0, 0, 0, 1);
}
else if ((data & 0xC0) == 0x40)
{
SetVRAM_Mirror(VRAM_VMIRROR);
}
else if ((data & 0xC0) == 0x80)
{
SetVRAM_Mirror(VRAM_HMIRROR);
}
else
{
SetVRAM_Mirror(VRAM_MIRROR4H);
}
}
}
}