LISP implementations on small machines

On 10/1/2019 7:23 PM, Mark Kahrs via cctalk wrote: When I was at UMR a couple of students wrote a Lisp interpreter for the Micro 1600 running the 1621 firmware.? It had the missing feature that there was no garbage collect, and would die when the cells storage ran out.? Very quickly. They then added paging to a 5mb dynex and used the entire space of the bottom platter, at 2.5mb and ran a lot longer with paging. And they then added a firmware assist to do a couple of operations if they were recognized, and it supposedly ran a bit faster, but with disk paging, hard to tell. I could try to dig up the source if anyone is interested and share it.? I've got an emulator which runs the OS and firmware for the 1621 and it's on my list of programs to resurrect and get running. FWIW, I had soaked up enough lisp from this and a version which ran in batch on the 360/50 MVT system that I knew it well enough to be dangerous on the Multics system at the University of Southwestern Louisiana, Lafayette, LA It of course ran maclisp.? The main thing that was fun to play with there was macsyma.? When Professor Jerry Saltzer visited the site was grateful to visit with him as he had a lot to do with the system and macsyma in particular. Forget Eliza and such, if you had macsyma in 1975, you'd swear you were talking to something out of this world.? I also remembered enough of my math to run it thru a lot of problems and it was able to figure them out, even with some trickery. There is a version for the Multics Emulator, but I don't think the version I could have saved in 1975 was saved.? I hope to get that running at some point (most likely after someone else gets it running, as macsyma isn't a program for the faint hearted to try to get running). thanks Jim