Anyone heard of the S1 Operating System

[Christian Corti]

On Thu, 27 Feb 2020, wrcooke at wrcooke.net wrote:
> Reading through the April 85 issue of Byte, I came across a reference to the "S1 Operating System."  In Jerry Pournelle's column on pg 361 he talks about this mysterious OS.  Here is a small excerpt:
> Robert Knight. formerly of
> Princeton's computer laboratories. is
> an old fan of my books and columns
> as well as the creator of SI. which he
> had running on an IBM Instruments
> CS9000
>
> Anyway, my Googling turned up nothing on the OS, although I did find a 
> Robert Knight at Princeton, but no information on stuff he's done.  I 
> will likely email him to ask about it, but wanted to ask here first if 
> anyone knows anything about it.

It seems that I have a full set of floppies for the CS/9000, like
"CS9000 REAL-TIME EXECUTIVE OPERATING SYSTEM VERSION 1.1", FORTRAN, BASIC, 
Assembler, Demos, Full Screen Editor.

Christian