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From: jason@hpcnoe.UUCP (Jason Zions)
Newsgroups: net.arch
Subject: Re: 68000 Memory Managment (Bechtolsheim patent) (SUID Patent)
Message-ID: <610003@hpcnoe.UUCP>
Date: Sun, 5-Oct-86 18:31:24 EDT
Article-I.D.: hpcnoe.610003
Posted: Sun Oct  5 18:31:24 1986
Date-Received: Fri, 10-Oct-86 01:18:47 EDT
References: <727@sauron.UUCP>
Organization: HP Colorado Networks Division
Lines: 28

Jerry Leichter says:

> I used TOPS-10 in 1969 or so; at the time it was already at Version 5 or
> thereabouts.  JACCT was already there; I don't know exactly when it was
> introduced.  TOPS-10 itself descended from earlier OS's for the PDP-15 (?),
> which, for all I know, already had JACCT or some analogue.

TOPS-10 didn't really descend from any OS; it was sort of written from
scratch with an interesting set of constraints. Someone from DEC wrote a book
discussing the design of the early versions of TOPS-10; fascinating reading.

If TOPS-10 were to descend from any DEC OS, it would be the one that ran on
the PDP-6, the predecessor to the PDP-10 (well, predecessor to the KA-10).
If memory serves, the PDP-15 was a pair of -11's hooked up in tandem (in the
same way a PDP-12 was a pair of PDP-8's in tandem). Exactly what the PDP-15
and PDP-12 were used for, I couldn't tell you.

(Here I am, correcting a correction. If someone corrects me, we may set a
record for levels of digression. This is net.arch, not net.ancient.history! )
--
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Jason Zions				Hewlett-Packard
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