Found PDP-1 Eliza in Lisp

[Oscar Vermeulen]

It's a fascinating story, but Bernie Cossell (one of the IMP guys) turns out to have written the Lisp-only (no MAD) version of Eliza that became the most popular one.

It can be found here:

https://github.com/jeffshrager/elizagen.org/tree/master/1966_Cosell_BBNLISP/ptape

It seems it is two tapes with the Lisp Eliza on it, but they give me an error.

...So it is not immediately clear how to run it - or if there is a BBN Lisp tape we're missing.

I hope someone will dig in to this. Having Eliza run again on the PDP-1 would be a Big Thing!

Kind regards,

Oscar.

[Oscar Vermeulen]

This page describes how to load Lisp, and load Lisp source code in it:

https://obsolescence.dev/pdp1-lisp-introduction.html

[Oscar Vermeulen]

Investigating this a bit more, this Eliza is written for 1966 PDP-1 BBN Lisp, which AFAIK has not been preserved.

As per the README, the 

A Perl simulator is part of the repository,

#The intent is to be compatible with the version of LISP described in
# The BBN-LISP System, Daniel G. Bobrow et al, February, 1966, AFCRL-66-180
# [BBN66].

...so this is a much bigger project. Hopefully someone will dive in to this, at some point, though!