Williams System 9 - 11

Note: This page is a work in progress. Please help get it to a completed state by adding any useful information to it.

1 Introduction

Put system info here

Williams System 9 Board Set

2 Games

2.1 System 9

• Space Shuttle
• Sorcerer
• Comet

2.2 System 11

• Grand Lizard
• High Speed
• Road Kings
• Gold Mine (Shuffle Alley)

2.3 System 11a

• Pinbot
• Millionaire
• F-14 Tomcat
• Fire!
• Fire! Champagne Edition

2.4 System 11b

• Big Guns
• Space Station
• Cyclone
• Banzai Run
• Swords of Fury
• Taxi
• Jokerz!
• Earthshaker
• Black Knight 2000
• Police Force
• Elvira and the Party Monsters
• Bad Cats
• Mousin' Around!
• Whirlwind

2.5 System 11c

• The Bally Game Show
• Pool Sharks
• Rollergames
• Diner
• Radical!
• Dr. Dude
• Riverboat Gambler
• Bugs Bunny's Birthday Ball

3 Technical Info

The System 11 Board Set

4 Problems and Fixes

4.1 Power Driver Issues

This may not apply to some, as MPU might have been part of it.

4.3 Power Supply Issues

Replacement power supply

If using the Rottendog WDP011A power supply for Williams Cyclone or Big Guns, you may have to move the +12v jumper from the bottom jump to the top. If your machine has GI but doesn't boot (only the 5v light on the CPU is lit) and is one of these two games, that is the most likely reason.

4.4 Display Driver Board

Possibly doesn't apply to some, can't think of an example.

4.5 Audio

System 11 games are known to have some amount of hum. An easy thing to test is to make sure all boards are secured tightly with all screws. This will insure the boards have a proper ground.

Another cause of hum could by an inconsistent +5 volts from the power driver board. An indicator of this being the cause of your hum would be the game occasionally resetting as well. Replacing caps C8 and C10 on the power board may fix this issue.

5 Repair Logs

Did you do a repair? Log it here as a possible solution for others.