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From: dje@datacube.UUCP
Newsgroups: comp.arch
Subject: Re: *-VME bus repeaters
Message-ID: <101200006@datacube>
Date: Sun, 29-Nov-87 14:43:00 EST
Article-I.D.: datacube.101200006
Posted: Sun Nov 29 14:43:00 1987
Date-Received: Wed, 2-Dec-87 03:34:04 EST
References: <1524@mmm.UUCP>
Lines: 22
Nf-ID: #R:mmm.UUCP:-152400:datacube:101200006:000:987
Nf-From: datacube.UUCP!dje    Nov 29 14:43:00 1987


We use  VME Bus  repeaters often.   We  started with  the PT-901 (A24
D16).  Then we switched to the PT-902 (A32 D32).  Then we switched to
the Hal Versa repeater.  The cabling  of the  PT-902 did  not work in
our system.  It uses round cable, about 0.5" in diameter  and large D
connectors.  These did  not fit  in our  box or  in the  Sun-3 at the
other end.  While we (and P-T)  were busy  redesigning complex cables
to fit both ends, the Hal-Versa unit came out and  solved the problem
for  us.    They  use  special controlled-impedance  flat cables with
standard ribbon headers on the  ends.   The Hal-Versa  also has about
1/3 the number of chips and is therefore cheaper than the PT-902.  

They all work fine though. 

 				Dave Erickson
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