Re: IBM 9020 FAA/ATC Systems from 1960's

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#210928

From: Guenther Vieth
Date: Thu, 16 Aug 2001 13:52

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A picture of a 9020 panel is published in the book of

Paul E. Ceruzzi
A History of Modern Computing
MIT Press 1998
ISBN 0-262-03255-4
(Page 150)

The panel look not like a 50 or 65.
No rollers !

Can anyone comment this ?

gv


Chris Bigos wrote:
> 
> Dear Dan / transatlantic cousins,
> 
> I hope I can add my little bit to the shared knowledge in this thread:
> 
...
> > "About 1/4 the way down the left hand side is a square hole. It's where a
> lighted button went. Any idea what the button was (vainly hoping I can find
> the correctly labeled button somewhere)? I don't think it was "Power On", as
> there is a switch on the lower right quadrant labeled that."
> 
> This was the '360 compatibility mode' button. I recall it was translucent
> green and engraved "360" rather than "360 MODE" (p/n 5383203 - I have one
> somewhere, perhaps I could JPEG it if you're bent on an accurate
> restoration). The pushbutton was backlighted when 360 compatibility mode was
> active, which could only be whilst in state 1, 0, or Test in either
> Supervisor or Problem mode. When not in 360 mode the CE was in 9020 mode (we
> only ever took our CEs out of 9020 mode when running the diagnostic that
> checked that 360 mode worked!).
> 
...

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From: Guenther Vieth <guenthe...@d.kamp.net>
Newsgroups: alt.folklore.computers
Subject: Re: IBM 9020 FAA/ATC Systems from 1960's
Date: Thu, 16 Aug 2001 15:52:36 +0200
Organization: gv
Lines: 38
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