Thanks for the link - at the time I did a quick search and didn't find that or any other language with that name.

The 1KB target was for Baby 8 (the associated processor) binary code. That processor had a few quirks (like only indirect addressing outside the "zero page") and the language design partly reflected that. Seeing other people fit Lisp into less than 512 bytes made me think I had sacrificed too much functionality for size.

The incomplete Squeak code was just a quick test to see if the language made sense at all before wasting time doing the assembly version.