Path: utzoo!attcan!uunet!munnari.oz.au!metro!news
From: carsup@extro.ucc.su.OZ.AU (Fisher Library support)
Newsgroups: comp.sys.mac.misc
Subject: Re: NuBus/030-Direct cards for IIsi
Message-ID: <1990Oct26.021844.17311@metro.ucc.su.OZ.AU>
Date: 26 Oct 90 02:18:44 GMT
References: <329@ub.d.umn.edu> <90296.165727CXT105@psuvm.psu.edu> <0093EAB1.E1F7F0A0@KING.ENG.UMD.EDU> <90297.220655CXT105@psuvm.psu.edu>
Reply-To: carsup@extro.ucc.su.OZ.AU (Fisher Library support)
Organization: University Computing Service, Uni. of Sydney, Australia.
Lines: 54
Nntp-Posting-Host: extro.ucc.su.oz.au

In article <90297.220655CXT105@psuvm.psu.edu> you write:
>
>Okay, I'll accept this.  However, I contest the claim that "doing graphics"
>isn't computationally intensive.  You really should have a coprocessor if
>you're doing heavily graphics intensive work; the speed difference is
>noticable.
>
	There graphics coprocessors to speed up QD directly, you are only
partly correct. :)
>
>This still doesn't explain why I have to buy the coprocessor twice if I
>want to use both NuBus and PDS.  Why can't I just transfer the 68882 from
>the one adapter to the other (by putting it on a mini-card, or some such)?
>
	Look, why don't you buy a ci if you really need more than one slot?

>Apple has assumed that people are going to want to use one expansion
>method or the other, but not both.  I'm wondering whether this will really
>be the case.  If Macintoshes in general were significantly cheaper, then
>I'd believe it; people who now are locked into buying Classics (or formerly
>Plus's) for budget reasons could buy IIsi's instead, and be happier about
>getting a machine with SOME expansion capability....  However, many people
>have wanted to upgrade/expand their SE's, or their Plus's, which I take as
>evidence that the similar group of new Macintosh owners who get IIsi's will
>also want to upgrade.
>
>The adapter/coprocessor cards for the IIsi cost about $180 (academic).
>How much of that is the cost of the coprocessor?  Would it really be
>prohibitively expensive to change the design of the adapter cards to
>allow coprocessors to be moved from one to another?  PDS and NuBus each
>have their own advantages and disadvantages (NuBus is slow, but there
>are lots of different products available; PDS is fast, but there are
>currently few products available).  If the coprocessor is a significant
>portion of the cost of the adapter cards (as implied by the fact that,
>contrary to Apple's past claims to the contrary, the new Macs do not
>come with the coprocessor standard), it would be a boon to those people
>on tight budgets (at whom the machine is supposedly targeted) to be able
>to buy their second adapter card without the additional cost of the
>duplicate coprocessor....  or, they could buy just one adapter, without
>the coprocessor, if they don't need the math boost, thereby avoiding
>paying money for a feature they didn't ask for.
>
>I guess I just resent not being able to pay for ONLY what I want to have,
>instead of being forced to pay for just those arrangements that Apple has
>deigned to offer us....

	The last paragraph seems to contradict what
you had been saying till now.  I guss you're
not an economics major, right?  :) Please see my post on your original posting.

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