Williams house numbers for the 6800-family chips
Chips may carry Williams or Motorola house numbers instead of 6800-family names: 6800 CPU is 5A-8987 (Motorola SC44216P), 6821 PIA is 5A-8972 (SC44067P), 6810 RAM is 5A-9003 and 6808 CPU is 5A-9150.
Systems
Related tips
- CPU chip types: 6800 on System 3/4, 6802 or 6808 on System 6/7
- Chips a System 7 CPU board needs to run the Williams test ROM
- Remove an old chip socket
- Chips that commonly fail on System 3-7 boards
- Which RAM chips go at IC13 and IC16
- Williams CPU boards only self-test when asked
- Memory protect chips to check after the 5101
- Obsolete chips on System 3 to 7 CPU boards
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)