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From: vishniac@wanginst.UUCP (Ephraim Vishniac)
Newsgroups: net.micro.mac
Subject: Re: Re: Clip version of hyperdrive?
Message-ID: <819@wanginst.UUCP>
Date: Wed, 17-Jul-85 08:52:05 EDT
Article-I.D.: wanginst.819
Posted: Wed Jul 17 08:52:05 1985
Date-Received: Fri, 19-Jul-85 02:43:03 EDT
References: <980@mhuxt.UUCP> <809@wanginst.UUCP>
Organization: Wang Institute, Tyngsboro, Ma.  01879
Lines: 25

> > Apple's approval of the hyperdrive mentions the clip mount version of
> > that product. Does anyone have any info on what that means -- do they
> > have some sort of clip that attaches to the logic board without
> > soldering?
> > 
> Yes.  The clip fits over the 68000 chip.  My understanding is that the
> original 68000 chip is electrically disabled (so that it doesn't get
> *very hot* under the clip).  Presumably, another 68000 on the piggyback
> board substitutes for it.
> 
> I have not seen the new model Hyperdrive, but I have seen the clip and
> discussed its application.
> 
> Ephraim Vishniac

I stand corrected (by two GCC employees).  The clip version of Hyperdrive
does not disable the original CPU chip, and they do not have any problem
with heat dissipation.  Even with the clip, etc., the CPU chip remains
at least as cool as in an unmodified Mac (I'm told).

-- 
Ephraim Vishniac
  [apollo, bbncca, cadmus, decvax, harvard, linus, masscomp]!wanginst!vishniac
  vishniac%Wang-Inst@Csnet-Relay