Williams / Bally WPC89 MPU Board A-12742-xx


4 in stock (can be backordered)


  1. Part Number MPU089

Williams / Bally WPC89 MPU Board

MPU089 This board is a plug and play replacement for the original  Bally / Williams WPC089  MPU processor board.  The original MPU board that this board replaces is Bally / Williams part number A-12742-xx (where xx is the game number).

Key Benefits Over Original / Replacement Boards

 Remote battery holder (no future acid damage).

 ZERO surface mount components.  This is not a throw away board.  We ONLY do Through-Hole Designs

 No custom components.

 Socketed through hole connector for RAM Chip.

 All new (not 20+ year old) components and PCB

 All of our components match the original schematic component designators, so you can troubleshoot with the original schematics or our schematics!


Most of our distributors offer this board without game ROM, ASIC and Microprocessor.  This is done to keep the price of the board as low as possible.  The Game ROM, ASIC and Microprocessors rarely go bad and are socketed so they can be moved from the original board to our board with minimum of effort. 

Warranty is void if not installed by professional pinball technician.

Game List

  • Addams Family
  • Addams Family Gold
  • Black Rose
  • Creature From the Black Lagoon
  • Demolition Man
  • Dr. Dude
  • Dr. Who
  • Dracula
  • Fish Tales
  • Funhouse
  • Getaway
  • Gilligan’s Island
  • Harley Davidson
  • Hurricane
  • Indiana Jones
  • Judge Dredd
  • Machine Bride of Pinbot, The
  • Party Zone
  • Popeye
  • Star Trek, The Next Generation
  • Slugfest
  • Terminator 2
  • The Machine, Bride of Pinbot
  • Twilight Zone
  • White Water