I went back and looked it up:
I'd guess they used something _like_ this, to build the CPUs, hardened for space of course.
Not a member of The Register?
Create a new account
Remember me on this computer?
The Register - Independent news and views for the tech community. Part of Situation Publishing
Join our daily or weekly newsletters, subscribe to a specific section or set News alerts
Biting the hand that feeds IT © 1998–2019