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From: mark@hubcap.clemson.edu (Mark Smotherman)
Newsgroups: comp.arch
Subject: Plessey 250
Message-ID: <11649@hubcap.clemson.edu>
Date: 15 Nov 90 21:16:11 GMT
References: <1990Nov15.183201.23217@bellcore.bellcore.com>
Organization: Clemson University, Clemson, SC
Lines: 29

From article <1990Nov15.183201.23217@bellcore.bellcore.com>, by mo@messy.bellcore.com (Michael O'Dell):
> I've seen this machine referenced many times, but I've never seen
> a description of the machine and its operating system.  Is there such
> a description available??


Plessey System 250 (1972) - capability protection [19,26,27,33,40].
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[19] D.C. Cosserat, "A Capability Oriented Multi-Processor System for
Real-Time Applications," in Proc. Intl. Conf. Computer Communications,
Washington, DC, 1972, pp. 282-289.

[26] D.M. England, "Architectural Features of System 250," in
Operating Systems: Intl. Computer State of the Art Report, Vol. 14.
Maindenhead, England: Infotech, 1972, pp. 395-427.

[27] D.M. England, "Operating System of System 250," in
Proc. Intl. Switching Symp., Cambridge, MA, June 1972, pp. 525-529.

[33] D. Halton, "Hardware of the System 250 for Communication Control," in
Proc. Intl. Switching Symp., Cambridge, MA, June 1972, pp. 530-536.

[40] H.M. Levy, "The Plessey System 250," chapter 4 of
Capability-Based Computer Systems.  Bedford, MA: Digital Press, 1984.
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If someone comes across more references, I'd like to get them, too.
-- 
Mark Smotherman, Comp. Sci. Dept., Clemson University, Clemson, SC 29634
INTERNET: mark@hubcap.clemson.edu    UUCP: gatech!hubcap!mark