NTSC, 62 , 100 , 100 
  audio, 140 , 141 , 158-159 
  blitter, 193 
  clock, 2 
  playfield, 49 , 52 , 57 , 58 
  serial baud rate, 255 
  sprites, 100 , 100 
  vertical blank, 219 
  video, 3 , 24 , 27 , 34 , 40-41 , 45 , 304