AxibugEmuOnline/References/VirtuaNESex_src_191105/NES/Mapper/Mapper134.cpp
2024-08-05 17:58:53 +08:00

63 lines
1.2 KiB
C++

//////////////////////////////////////////////////////////////////////////
// Mapper133 SACHEN CHEN //
//////////////////////////////////////////////////////////////////////////
void Mapper134::Reset()
{
SetPROM_32K_Bank( 0 );
// SetPROM_16K_Bank( 6, 0 );
// SetPROM_16K_Bank( 6, 1 );
SetVROM_8K_Bank( 0 );
}
void Mapper134::WriteLow( WORD addr, BYTE data )
{
switch( addr & 0x4101 ) {
case 0x4100:
cmd = data & 0x07;
break;
case 0x4101:
switch( cmd ) {
case 0:
prg = 0;
chr = 3;
break;
case 4:
chr &= 0x3;
chr |= (data & 0x07) << 2;
break;
case 5:
prg = data & 0x07;
break;
case 6:
chr &= 0x1C;
chr |= data & 0x3;
break;
case 7:
if( data & 0x01 ) SetVRAM_Mirror( VRAM_HMIRROR );
else SetVRAM_Mirror( VRAM_VMIRROR );
break;
}
break;
}
SetPROM_32K_Bank( prg );
// SetPROM_16K_Bank( 4, (prg<<1)|0 );
// SetPROM_16K_Bank( 6, (prg<<1)|1 );
SetVROM_8K_Bank( chr );
CPU_MEM_BANK[addr>>13][addr&0x1FFF] = data;
}
void Mapper134::SaveState( LPBYTE p )
{
p[ 0] = cmd;
p[ 1] = prg;
p[ 2] = chr;
}
void Mapper134::LoadState( LPBYTE p )
{
cmd = p[ 0];
prg = p[ 1];
chr = p[ 2];
}