AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper232.cpp

<EFBFBD><EFBFBD>//////////////////////////////////////////////////////////////////////////
// Mapper232  Quattro Games                                             //
//////////////////////////////////////////////////////////////////////////
void	Mapper232::Reset()
{
	SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );

	reg[0] = 0x0C;
	reg[1] = 0x00;
}

void	Mapper232::WriteLow( WORD addr, BYTE data )
{
	if( addr >= 0x6000 ) {
		Write( addr, data );
	}
}

void	Mapper232::Write( WORD addr, BYTE data )
{
//	if( addr == 0x9000 ) {
//		reg[0] = (data & 0x18)>>1;
//	} else if( addr >= 0xA000 && addr <= 0xFFFF ) {
//		reg[1] = data & 0x03;
//	}
	if( addr <= 0x9FFF ) {
		reg[0] = (data & 0x18)>>1;
	} else {
		reg[1] = data & 0x03;
	}

	SetPROM_8K_Bank( 4, (reg[0]|reg[1])*2+0 );
	SetPROM_8K_Bank( 5, (reg[0]|reg[1])*2+1 );
	SetPROM_8K_Bank( 6, (reg[0]|0x03)*2+0 );
	SetPROM_8K_Bank( 7, (reg[0]|0x03)*2+1 );
}

void	Mapper232::SaveState( LPBYTE p )
{
	p[ 0] = reg[0];
	p[ 1] = reg[1];
}

void	Mapper232::LoadState( LPBYTE p )
{
	reg[0] = p[ 0];
	reg[1] = p[ 1];
}