That sounds like it would have been very interesting! Back in the 70's it wasn't an uncommon "hobby project" to build a very simple "CPU" using TTL parts. Whi

That sounds like it would have been very interesting! Back in the 70's it wasn't an uncommon "hobby project" to build a very simple "CPU" using TTL parts. While the computational utility was obviously limited it was a great learning exercise. I remember working out the logic of "JK" flip-flops and the like. At one time I'd acquired some ancient vacuum tube versions of said flip-flops. Wish I'd kept them, they'd be a great curiosity today, a collector's item of sorts. Should evoke some good memories looking through the catalogs of current versions of those venerable products. Won't be surprising if they'll be around for a long time into the future.