This CPU is built out of about 800 Soviet reed relays, RES64, RES55, and RES-43 relays, if you want some part numbers. These relays are mounted on logic cards connected to a backplane.

This led to a wide word width but made it simple to see when a relay got stuck since each number had two parts and only one relay was on in each part for any number. The video isn’t just a home ...