
It uses a 1B1165/2 MPU, five 1B11150/0 (8 Digit) Display boards, a 1B11136/0 Sound board, a 1B1166 driver board, and a 1B11167/0 Power Supply board. The sound board uses the TMS5200 speech chip which was also used by Bally on their "Squawk and Talk" sound board.
Images via IPDB.org