Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!apple!well!farren
From: farren@well.UUCP (Mike Farren)
Newsgroups: comp.sys.amiga
Subject: Re: Non-Zorro slots in the Amiga 3000
Keywords: 3000 slots
Message-ID: <14997@well.UUCP>
Date: 13 Dec 89 23:51:22 GMT
References: <5906@ubc-cs.UUCP> <3751@convex.UUCP> <5936@ubc-cs.UUCP> <3854@convex.UUCP>
Reply-To: farren@well.UUCP (Mike Farren)
Distribution: na
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 22

In article <3751@convex.UUCP& swarren@convex.COM (Steve Warren) writes:
> <discussion of EISA technique of allowing two different cards to interface
   differently, but using the same slot by having two levels of connector
   pins deleted >
>This technique is already being used in "blue" land.  Yes, they do
>manage to do some things right out there, and I think this is a
>good example.

I can't consider this technique "right" in any real way.  It has struck
me, from the beginning, as some of the shakiest mechanical and
electronic engineering work I've ever seen.  Not only does it require
special card-edge connectors which are going to be hell to fabricate,
and therefore expensive, but it takes too little account of such things
as PCB tolerances, random glorp dropping into the connectors, and the
biggest problem of all, the near-total lack of any knowledge on the part
of the people sticking the damn cards into the slots.  It's easy enough
to misalign a card in an existing slot, but at least the existing slots
don't carry the problem of dealing with signal and power lines shorting
to one another...

-- 
Mike Farren 				     farren@well.sf.ca.usa