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Dev tools · August 17, 2022

CA

Crabs All the Way Down – Running Rust on Logic Gates

Made an ARM Thumb CPU from scratch in a digital circuit simulator for fun and decided to push the joke a little further and run real stuff on it, like a Web server, a Scheme interpreter, a MIDI player, and a VT100 emulator. This is basically a how-did-we-get-here blogpost, it's my second one of this kind, I'd love any feedback you might have.

In plain words

Crabs All the Way Down documents a project where an ARM Thumb CPU was built from scratch using a digital circuit simulator, then pushed further by running real applications on it including a web server, Scheme interpreter, MIDI player, and VT100 emulator. The project serves as a technical deep-dive blog post exploring how these components were integrated together, aimed at developers interested in CPU design and low-level systems programming.

written from the facts on this page · September 2026

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