7 Jan
2025
7 Jan
'25
5:53 p.m.
G. Branden Robinson wrote:
What model of PDP-11 was v1 Unix developed and run on
at the CSRC?
For what it's worth, there is a roff.s in the PDP-7 sources.
The command list:
https://github.com/DoctorWkt/pdp7-unix/blob/master/src/cmd/roff.s#L189
What model did the CSRC acquire next? Specifically,
which one did
(n)roff make possible?
The first was an 11/20, initially, I seem to recall running without
any MMU (I remember a story that it was customary to yell out "a.out"
in the terminal room before running a newly compiled binary to give
everyone a chance to save their files).
I believe the step up was to the high-end 11/45, which I believe came
out before the 11/40 (a mid-range system with MMU but not separate
Instruction & Data spaces).
See https://gunkies.org/wiki/PDP-11