From: wkt@tuhs.org (Warren Toomey)
Subject: [TUHS] Strange Birth of Unix
Date: Fri, 2 Dec 2011 07:41:16 +1000 [thread overview]
Message-ID: <20111201214116.GA13412@minnie.tuhs.org> (raw)
All,
My IEEE Spectrum article finally got published and you can read it
on-line here: http://spectrum.ieee.org/computing/software/the-strange-birth-and-long-life-of-unix/0
I've had a few e-mails about it. This one has a few more snippets about
early Unix history (from Rey Bonachea):
It was with great pleasure and a bit of nostalgia that I read your IEEE
article below. Thank you very much for writing it. One aspect that did
not get mention, and that perhaps you may or may not be aware of, was
the pseudo real time applications of Unix.
In 1972 I joined Bell Labs in Holmdel NJ working on a project by the name
of Switching Control Center System. At the beginning I was just a brand
new member of the technical staff working on circuit design for
interfaces to the PDP11/20. This project was meant to centralize the data
streams from the maintenance channel of switching machine. Then, in a
multi-user environment , would analyze the incoming data streams and raise
alarms as appropriate. It also provided a whole suite of analysis tools to
allow switch maintenance personnel to trouble shoot the electronic
switches.
Because the switches could not buffer messages or be slowed by flow
control, the Unix system had to catch messages in real time and put it
away on disk for later analysis. Due to the near real time requirements, a
number of features were added to Unix such as semaphores. The Unix based
Switching Control Center System (SCCS) software was trialed in New
Brunswick NJ in 1973 and later that year was released as the first
commercial application of the Unix OS.
I learned to program on that PDP 11/20 computer running Unix and
eventually wrote many applications for the SCCS, initially in assembly
language and then in C as we were also the first project to use C
commercially.
Cheers,
Warren
next reply other threads:[~2011-12-01 21:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-01 21:41 Warren Toomey [this message]
2011-12-02 2:18 ` Michael Kerpan
2011-12-02 2:41 ` Tim Newsham
[not found] ` <Pine.BSI.4.64.1112110216430.28648@dave.horsfall.org>
2011-12-10 16:07 ` John Cowan
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