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From: jss@sjuvax.UUCP (J. Shapiro)
Newsgroups: net.arch,net.micro
Subject: Re: Re: How to fab One-Of-A-Kind systems?
Message-ID: <1143@sjuvax.UUCP>
Date: Sun, 12-May-85 01:16:02 EDT
Article-I.D.: sjuvax.1143
Posted: Sun May 12 01:16:02 1985
Date-Received: Mon, 13-May-85 03:20:09 EDT
References: <202@ganehd.UUCP> <183@geowhiz.UUCP>
Organization: St. Joseph's University, Phila. PA.
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Xref: watmath net.arch:1181 net.micro:10336

Regardgin wire wrapping...
> 
>     2) The corners of the posts are sharp and form an airtight
>        connection with the wire.
> 
Nay - better than, this, the seal is basically a cold weld - damn unlikely
that it will randomly remove itself.

Things to beware of, however:

	At high speed, wire wrap temds to crap out.
	(i.e. > 8 Mhz or so).  Then again, so do sockets.

	Beware of kinked wires - these *do* go with time, but are easy
	to spot once gone. In particular, the repair time given a known break
	is quite low.

Also, get yourself an electric wire wrap gun - it will save many many hours
of precious time, and will prevent a lot of bad wraps.

I just completed a VAX I/O interface which was wirewrapped... I will be
prototyping a small computer shortly using wirewrap.

Jon Shapiro