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There's also Chuck Moore, who created Forth, used it to create a bunch of operating systems the most notable of which is colorForth, then implemented chip design and simulation in colorForth and used it to design chips that run Forth (and his chips were produced and even used in at least one commercial product).

https://colorforth.github.io/

Twice.

Well there is nand2tetris.org and probably others.

Wirth and his systems are a treasure of the CS universe.

I also rather like Wirth's Lola hardware language and RISC CPU. Great stuff.

>Lola hardware language

Huh - hadn't come across this before but very nice HDL