Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: notesfiles
Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!genrad!panda!talcott!harvard!seismo!hao!hplabs!hp-pcd!orstcs!johng
From: johng @orstcs.UUCP (johng )
Newsgroups: net.micro
Subject: Re: Re: Re: How to fab One-Of-A-Kind
Message-ID: <1400008@orstcs.UUCP>
Date: Sun, 2-Jun-85 04:58:00 EDT
Article-I.D.: orstcs.1400008
Posted: Sun Jun  2 04:58:00 1985
Date-Received: Thu, 6-Jun-85 05:04:45 EDT
Organization: Oregon State University - Corvallis, OR
Lines: 28
Nf-ID: #N:orstcs:1400008:000:970
Nf-From: orstcs!johng     Jun  2 00:58:00 1985


[Like a version.  Released for the very first time...]

Subject: Re: Re: Re: How to fab One-Of-A-Kind systems?

>> 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.
>
>Not necessarily true. At NCR we used twisted pair wire wrap in a large,
>multiboard, 38-nanosecond processor.

At what speed is twisted pair necessary?  How is it done.  I am planning on 
building a graphics controller (video freq 80-125 MHz).  There will be a few
clocked lines going at about 100 MHz going to the shift registers.  What do
I really have to worry about in my design (besides lots of despiking caps and
short wires)?  I want to wire wrap this unless wire wrapping can't handle the
speed.  If it can't, what can and still be in a <5K budget.

				John Gregor
				...tektronix!orstcs!johng   

				will be for the summer

				...tektronix!ogcvax!gregorj

Disclaimer:  This made sense when I wrote it.