Great work!

[ebruneton]

I like your goal of a computer that can be fully understood by a single person. I understand the choice of Rust, but the Rust compiler itself (which uses LLVM) is too large in my opinion. My personal attempt towards this goal led a toy computer built on an Arduino Due, with a monotasking, self-hosted OS (kernel with 10 system calls and memory protection, a shell, a few command line utilities [ls, rm, cp, etc], a text editor, and a compiler for a toy programming language), in less than 3300 lines of code. See https://github.com/ebruneton/toypc.