AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper022.cpp

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//////////////////////////////////////////////////////////////////////////
// Mapper022 Konami VRC2 type A //
//////////////////////////////////////////////////////////////////////////
void Mapper022::Reset()
{
SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
}
void Mapper022::Write( WORD 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;
}
}