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From: JEllsworth@HI-MULTICS.ARPA
Newsgroups: mod.computers.vax
Subject: SID
Message-ID: <860902161016.047588@HI-MULTICS.ARPA>
Date: Tue, 2-Sep-86 12:10:00 EDT
Article-I.D.: HI-MULTI.860902161016.047588
Posted: Tue Sep  2 12:10:00 1986
Date-Received: Tue, 2-Sep-86 23:41:03 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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I've been informed that the low 16 bits from the SID are what should be
looked at when determining the "unique system ID"

The format is:

     0-15  unique sid
    16-22  CPU top rev level
    23     RIght or Left CPU
    24-31  CPU type


So it seems we have some code that is looking at more than the the
low-order bits....