Williams Technical Articles

Over many years of collecting Williams video games and pinball machines, I have found a number of modifications that increase reliability, allow us to use alternative parts and increase compatibility with other games.

If you have a tech tip that you think I should add here get in touch via the form on the Contact page.

R8948 Stargate CPU Board with BS.BA Modification Example

Stargate CPU Board Modification

Upgrade your Stargate CPU board so that it will also work with later games.

Click to open Stargate CPU Board Modification

Decoder PROM Replacements

Replacement solutions for the hard-to-find Williams Decoder PROMs.

Click to open Decoder PROM Replacements

D8224 Sound Board RAM Jumpering

Jumper your Sound board to use the internal RAM on the 6802 CPU instead of the 6810 RAM.

Click to open D8224 Sound Board RAM Jumpering

D8224 Sound Board ROM Jumpering

An illustrated guide to jumpering your Sound board ROM and inputs for any game.

Click to open D8224 Sound Board ROM Jumpering

CPU Board Battery Modification

Convert your CPU board to use a CR2032 coin cell rather than 3x AA batteries.

Click to open CPU Board Battery Modification

CPU Board RAM Modification

Convert your CPU board to use 4164/41256 RAM rather than 24x 4116 RAM.

Click to open CPU Board RAM Modification