The Kenbak-1 apparently predates the Altair and is the earliest “personal” microcomputer in existence. To use it you flipped a bunch of switches and watched the lights. A PS3 this definitely wasn’t.A tinkerer named Mark Wilson recently rebuilt a mini version of the Kenbak using an Arduino board, timing chip, and some memory, allowing him to add realtime clock functions and storage to what amounts to a very smart Lite-Brite.