If we're willing to extend the discussion to microcomputer Lisps targeting machine language, I'll repost an old comment https://news.ycombinator.com/item?id=20019592 :

> There were various Z80 and MOS 6502 microcomputer Lisp implementations written back in the '80s, some commercially released at the time, some readily accessible nowadays. https://www.wisdomandwonder.com/link/3787/how-small-can-a-sc.... https://groups.google.com/forum/#!topic/comp.lang.scheme/Z_2....

> (There's one that I'm horribly, horribly overdue to get back to the authors about archiving on the Internet, actually. Anyone who's based in North America and happens to have the hardware and the expertise to recover data from both 5.25" and 8" floppies in some CP/M format?)