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From: eachus@spectre.mitre.org (Robert I. Eachus)
Newsgroups: comp.lang.ada
Subject: Re: Student views on Ada
Date: 23 Sep 94 10:08:58
Organization: The Mitre Corp., Bedford, MA.
Message-ID: <EACHUS.94Sep23100858@spectre.mitre.org>
References: <INFO-ADA%94092110295932@VM1.NODAK.EDU>
 <35s3lc$69h@gnat.cs.nyu.edu>
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In-reply-to: dewar@cs.nyu.edu's message of 22 Sep 1994 10:17:16 -0400
Date: 1994-09-23T10:08:58+00:00
List-Id: <comp.lang.ada>


    Several early machines had no "blinkenlights."  For example the
Litton/General Precision LGP-30 and the Royal McBee RPG4000 both had
oscilloscopes to let you see the register contents as they flew by on
the drum.

     But of course Real Computer Operators did it all by ear on the
Univac I.  There was a speaker, usually attached to the sign bit of
the accumulator, which allowed you to debug your program by listening
to it run.  (The same technique was used to play music on the PDP-1 in
Bldg 16 at MIT, but that was just for fun.  The 'Dip had blining
lights for debugging, and the original ddt.)
--

					Robert I. Eachus

with Standard_Disclaimer;
use  Standard_Disclaimer;
function Message (Text: in Clever_Ideas) return Better_Ideas is...