One emulator is availible here: http://klh10.trailing-edge.com/ http://klh10.trailing-edge.com/ A tutorial on getting TOPS-20 here: http://gunkies.org/wiki/Runn

One emulator is availible here: http://klh10.trailing-edge.com/ http://klh10.trailing-edge.com/ A tutorial on getting TOPS-20 here: http://gunkies.org/wiki/Running_TOPS-20_V4.1_under_SIMH http://gunkies.org/wiki/Running_TOPS-20_V4.1_under_SIMH (Or ITS: http://gunkies.org/wiki/ITS http://gunkies.org/wiki/ITS) If those don't provide MacLisp (I think the TOPS-20 image should), then you might be able to find it (or a link that sets you on the right track) here: http://www.softwarepreservation.org/projects/LISP/maclisp_family/ http://www.softwarepreservation.org/projects/LISP/maclisp_fa... A manual for MacLISP is here, by the way: http://www.maclisp.info/pitmanual/meta-index.html http://www.maclisp.info/pitmanual/meta-index.html Some assorted software for the PDP-10 is here (Including TECO!): http://pdp-10.trailing-edge.com/ http://pdp-10.trailing-edge.com/ The reason I have posted this as a comment, rather than via email is because too often have I been looking for solutions to a problem, only to discover a solution was found and emailed to someone else -- denying myself and others access to the solution!