public int Read(int addr)
{
switch (addr & 0xFC00)
{
case 0x1800:
return(Via0.Read(addr));
case 0x1C00:
return(Via1.Read(addr));
}
if ((addr & 0x8000) != 0)
{
return(DriveRom.Read(addr & 0x3FFF));
}
if ((addr & 0x1F00) < 0x800)
{
return(_ram[addr & 0x7FF]);
}
return((addr >> 8) & 0xFF);
}