Processor board in base of drawer
U309
  Signetics
  82S181
  label:
    MAP
    0.4A
U706/ROM0L is:
  Texas Instruments
  TMS2532JL-45
  DBP8140
  label:
    CC
    0.6L
U710 is:
  Hitachi
  HN462532G
  label:
    CC
    0.6H