I've had a "grab bag" of chips in a box for months that I haven't had time to sort. Last night I got the bug, and while straightening pins and sorting, I found an AY-3-8500-1, one of the original "Pong on a Chip" chips. I found some schematics online quite easily. Condition of the chip is unknown, and I guess I'm going to have to build to find out, unless one of you has a suggestion for a quick health check? Patrick