Williams System 11, 11A, 11B and 11C MPU Board

This completely redesigned board replaces Williams System 11, 11A, 11B, and 11C MPU/Driver Boards. Williams/Bally #D-10881-xxx, D-11932, & D-11883-xxx. You will need to swap over your two Game ROMS from your MPU board and the two Sound ROMs from the Soundboard. These can also be bought separately from us. All 6821s chips are provided, and the MPU comes with NVRAM installed, no batteries are needed! Benefits over the original Williams board: – Williams WPC type mounting holes for ease of install / uninstall. – No batteries required for memory retention (no acid damage, ever!) – Simplified driver design using logic level FETs – No custom parts used in this design (all parts can be purchased through usual suspects) – Major component designators carried over from original design so original schematics can be used. Game List: • Alley Cats (Shuffle) • Bad Cats • Banzai Run • Big Guns • Black Knight 2000 • *Bugs Bunny Birthday Ball • Comet • Cyclone • *Diner • *Dr. Dude (Non-WPC machines) • Earthshaker • Elvira and the Party Monsters • F14 Tomcat • Fire! • High Speed • *Game Show • Gold Mine (Shuffle) • Grand Lizard • Jokerz • Millionaire • Mousin’ Around • Pinbot • Police Force • *Pool Sharks • *Radical • *Riverboat Gambler • Road Kings • *Roller Games • Shuffle Inn (Shuffle) • Sorcerer • Space Shuttle • Space Station • Star Lite (very few machines were Sys 9) • Strike Zone (Shuffle) • Swords of Fury • Taxi • Tic Tac Strike (Shuffle) • Top Dawg (Shuffle) • Transporter • Whirlwind