forked from sin365/AxibugEmuOnline
79 lines
2.1 KiB
C#
79 lines
2.1 KiB
C#
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper022 Konami VRC2 type A //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
using static VirtualNes.MMU;
|
|
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
}
|