Lisp Machine System 100.0, via usim! The new release works amazingly well.

download: https://tumbleweed.nu/r/bug-lispm/forumpost/7475d8a3db
manual: http://www.bitsavers.org/pdf/mit/cadr/chinual_4thEd_Jul81.pdf

boot with:

cd usim; make; cd -
./usim/usim -c usim-100-0.ini

#lispm