Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!zephyr.ens.tek.com!tekcrl!snowbird!rjn
From: rjn@snowbird.LABS.TEK.COM (Jim Nusbaum)
Newsgroups: comp.realtime
Subject: Re: What is VXI bus ?
Keywords: VXI bus
Message-ID: <6255@tekcrl.LABS.TEK.COM>
Date: 25 May 90 23:07:25 GMT
References: <1990May22.165409.3727@murdoch.acc.Virginia.EDU> <6630@fmeed1.UUCP>
Sender: news@tekcrl.LABS.TEK.COM
Reply-To: rjn@snowbird.LABS.TEK.COM (Jim Nusbaum)
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Organization: Computer Research Laboratory, Tektronix, Inc., Beaverton OR
Lines: 24

In article <6630@fmeed1.UUCP> wehr@fmeed1.UUCP (Bruce Wehr) writes:
>
>VXI is an extension of the VME bus to accomodate instruments-on-a-card.
>There are different types of VXI controllers.  You can have external
>boxes that talk to the cage through a 'Slot 0' interface equipped with
>an IEEE-488 interface.  Communication to the cards is slow (the
>interface must translate high-level ASCII IEEE-488 commands to
>register-level commands), but the controller is easily exapanded.  Or,
>-- 
>	       Bruce Wehr (wehr%dptc.decnet@srlvx0.srl.ford.com)

One slight clarification.  Communication to VXI slot 0 controllers does
not have to be via GPIB.  It can be anything you want (serial, ethernet,
etc.) and therefore does not have to be slow.

MXI bus is pushed by National Instruments and I think their catalog has
a discussion of it.


--
Jim Nusbaum, Computer Research Lab, Tektronix, Inc.  
[ucbvax,decvax,allegra,uw-beaver,hplabs]!tektronix!tekchips!rjn
rjn@tekchips.labs.tek.com
(503) 627-4612