YouTube user Richard Lewis built a working replica of the Digi-Comp II mechanical computer in the sandbox video game Terraria.
The replica makes extensive use of the so-called “Hoik glitch” in the game, that allows for rapid, controlled player movement, much like gravity guides the balls downward in the original.
More information about the version in Terraria is posted on the video page.
Makes you wonder- can one build a Universal Turing Machine out of digicomp-like components?
I’m sure that you could, and I’d love to see it. There are some features in the DCII that hint at it, such as when doing the complement operation and the accumulator is switched back and forth between being an adder and inverter.
That’s my thinking too. If I were to try it, I’d read this book first:
http://www.amazon.com/Collision-Based-Computing-Andrew-Adamatzky/dp/1852335408