EPROM types used for System 3 to 7 game code

Replacement game code for these systems goes into 2716 or 2532 EPROMs (files ending .716 and .532). Firepower is the exception: its combined game code needs a 2732 (.732). Some of the factory ROM images that Williams published were wrong, so use images known to work.

Systems

• Williams System 3
• Williams System 4
• Williams System 6 / 6A
• Williams System 7

Related tips

• System 7 SW1 diagnostic codes
• What System 7 codes often turn out to mean
• Flipper ROM color codes by system
• Set System 6 jumpers J3/J4 for a single game EPROM at IC14
• Convert a System 3 CPU board to a single 2716 game EPROM at IC14
• CPU chip types: 6800 on System 3/4, 6802 or 6808 on System 6/7
• System 7 EPROM layout: Hyperball/Defender/Star Light vs other games
• Identifying a System 3 to 7 CPU board

Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)