Like aftbit, I also learned about excess-3. It's amazing to see what was done to save a few gates back when "a few gates" wasn't just a 74-series chip, but an e

Like aftbit, I also learned about excess-3. It's amazing to see what was done to save a few gates back when "a few gates" wasn't just a 74-series chip, but an entire handmade board. But before that, the unidisc blew my mind. I had to do some further research and then send to a half-dozen friends before finishing Ken's article. Halfway assumed it was a fake photo until digging a bit further. Couldn't have looked much more like a giant 3.5" floppy if it tried.