4 Jan
2007
4 Jan
'07
10:59 a.m.
Leonardo DaVinci put errors in the drawings for his "tank."
From: "Brian L. Stuart" <blstuart at
bellsouth.net>
Reply-To: "General Discussion: On-Topic and Off-Topic
Posts"<cctalk at classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic
Posts" <cctalk at classiccmp.org>
Subject: Re: Purposefully fudged schematics (was: Wire Rope ROMs (Was:
backto the AGC, was Re: TTL 7400's Available))
Date: Thu, 4 Jan 2007 8:49:54 -0600
This is a very old practice. Some of Babbage's drawings had
intentional errors. As I recall, he drew some parts in mirror image.
The group that did the difference engine reconstruction in London
ran into this. And the practice wasn't new when Babbage used
it.
BLS
_________________________________________________________________
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In article
<B9639BAE3F34504E83FEEDD71D4AFB460A660A at mail.bensene.com>,
"Rick Bensene" <rickb at bensene.com> writes:
> [...] Wang is also
> famous for purposefully putting errors into published schematics to
> throw off competitors who would use such schematics to
reverse-engineer
how the
machines work. [...]
Wow, I'd never heard that story before. Interesting!
How many other companies did this back when schematics were pretty
much leaving the machine laying naked in front of you?