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From: hudson@hounx.UUCP (C.HUDSON)
Newsgroups: net.micro.68k
Subject: What's Nu for VME.....
Message-ID: <984@hounx.UUCP>
Date: Tue, 28-Oct-86 12:47:26 EST
Article-I.D.: hounx.984
Posted: Tue Oct 28 12:47:26 1986
Date-Received: Tue, 28-Oct-86 23:21:19 EST
Organization: AT&T Bell Labs, Holmdel NJ
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>From: joel@gould9.UUCP (Joel West)
>Newsgroups: net.micro.mac,net.micro.68k
>Subject: What's Nu with VME for Mac?

>I know the Sun-3 is VME; aren't most of the other 680xx boxes
>also VME?  To my knowledge, only LMI (Symbolics?) and TI use Nu.

The VME bus standard was designed by Signetics, Motorola, and Mostek.
It follows that Motorola designs its 680** series to work well with
the VME and would encourage the use of the VME. It seems very unlikely
that a 680** box manufacturer would use anything but a VME bus. I'll
stick my neck out and state "All 680** box-makers use the VME bus."
(Anybody out there have a counterexample?)

>Would anyone care to comment on the technical advantages to using
>either bus?  From a marketing standpoint, I would think VME would
>offer a strong advantage.

I don't know much about the NuBus. I know however, in the past, TI
has designed busses which were not intended as general purpose, but
were designed for the 9900 product family (e.g. T-Bus, E-Bus).
Microprocessor-specific busses do not have much of a market advantage
unless the microprocessor supported is a technical marvel.

The VME bus provides a serial packet bus which operates autonomously of
the main parallel bus. This feature provides a standard interprocessor
communications channel, which facilitates distributed system/ multi-
processing environments.


	Cathy Hudson    ......ihnp4!hounx!hudson