On Fri, Feb 10, 2023 at 10:34 AM Dan Cross <crossd@gmail.com> wrote:

> If I recall correctly (and it's been a while...) csup, CVSup, et al
> were based on `sup`, which was a file distribution tool somewhat like
> `rdist`, which came from CMU. csup/cvsup was optimized for moving
> source code deltas (a la CVS repositories) around. I recall a
> graphical client written in Modula-3?
>
Right -- ??maybe?? Bob Baron or one of the Mach guys did it  - used the DEC
Modula-3 IIRC.

>
> The SUPDUP protocol used by ITS hosts was a "Display Protocol" based
> on TELNET: https://www.rfc-editor.org/rfc/rfc734

Exactly - popular with the LISP hackers.  I started to implement it in the
CMU Distributed Front-End years ago but never finished it - I don't know if
it was ever completed.
ᐧ