I saw my favourite words.
"Schematics are available"

https://tumbleweed.nu/lm-3/schematics.html

LM-3 --- MIT CADR schematics

So somehow I've ended up on a bit of a rabbit hole.

Schematics for the MIT CADR LISP machine are available, and in fact there's already an FPGA implementation!

https://tumbleweed.nu/r/uhdl/doc/trunk/README.md

uhdl: Documentation

@DosFox oooh  

might have to dig out my xilinx kit

@6a62 I have an Arty S7 *somewhere* that was pulled out of a prototype printer.

I may as well 👀👀👀