[froderick]

I wrote a bespoke scheme interpreter, then a virtual machine, a bytecode serialization format and a fun standard library. All in C. Totally useless for real work, not unique in any way, but really fun and great for learning. Sometimes useless shit is the best.

[john-tells-all]

I love that kind of stuff!

In college I wrote an assembler, interpreter, and simulator for an 8-bit chip, the 8048. Got a four-credit "A" :-D

Later I read the C code for a Scheme interpreter -- Scheme 9 in Empty Space -- highly recommended! I bought the book. https://t3x.org/s9book/index.html