BPLCON0, 87 , 229 , 298 , 300 
  enabling color, 63 
  in dual-playfield mode, 72 
  in hold-and-modify mode, 87 
  in interlacing, 51 
  in resolution mode, 49 
  in the Enhanced Chip Set, 300 
  selecting bitplanes, 48 
  setting bits, 48 
  with light pen, 239