🚀 go-pugleaf

In article <1991Jun5.231450.25856@digi.lonestar.org> crichmon@digi.lonestar.org (Charles Richmond) writes:
>A friend of mine in college told me about the Sigma 9 computer
>that he used at his previous university.  He said it was great
>for interactive use.  I believe that the computer was designed
>by Scientific Data Systems (SDS).  Later this company sold
>out to Xerox and became Xerox Data Systems (XDS).  I would
>like to know more about the hardware and software of the Sigma 9
>and perhaps its sibling, the Sigma 7.  
>

There's a fairly good description of the XDS-940 in "Timesharing Systems Design
Concepts" by Richard W. Watson, published in 1970 by McGraw-Hill.  Quoting
from the blurb on the cover flap:

"Special features include: the detailed coverage of principal aspects of
operating system design; the use of examples from two computer systems, XDS-940
and GE-645 Multics, for the bulk of its illustrations; and a cogent discussion
of the difficult, and often misunderstood, concept of segmentation."

An oldy but a goody!

	Bob Bentley
 	Intel Corp., M/S JF1-58			E-mail: rmb@ichips.intel.com 
 	5200 N.E. Elam Young Parkway		Phone:  (503) 696-4728          
 	Hillsboro, Oregon 97124			Fax:    (503) 696-4515