Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!wugate!uunet!lll-winken!arisia!sgi!shinobu!odin!maddog!pkr
From: pkr@maddog.sgi.com (Phil Ronzone)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Motorola 68851 PMMU discontinued
Message-ID: <1044@odin.SGI.COM>
Date: 23 Oct 89 16:24:55 GMT
References: <929@unsvax.NEVADA.EDU>
Sender: news@odin.SGI.COM
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 40

In article <929@unsvax.NEVADA.EDU> vale@arrakis.nevada.edu (Robert Vale) writes:
>Organization: The Vale Organization, Inc. 
>KeywordsMac II, PMMU, Motorola:
>
>i
>I just spoke with Bob Novis of Motorola Intra-company sales, and he told m that 
>Mototola has discontinued the MC 68851 Paged Memory Management Unit. This is the 
>chip thet Apple uses in the Mac II for virtual memory function. He further said that the last sale of these chips was on May 5, 1989 for a quantity of two to
>a distributor. Currently he said, Motorola has 4 chips in stock and that they
>are located in Tokyo, Japan. What is interesting about all this, besides th large amount
>of Mac II owners who will not be able to upgrade, is that Notorola is still 
>mass producing the 68020 microprocessor. I wonder how you can get virtual memory out of that now without the PMMU? Oh, thre is no alternate supplier for the chip.
>
>Thought yad like to know.....
>
>e
>Robert Vale ---> vale@arrakis.nevada.edu INTERNET
>                 (702) 735 - 6139        Voice


Aya ya ya ---

Well, I've heard that it isn't being made because the same line is being
used to make more 68030's.

Well, I called my local distributor and yep, they have none in stock,
and if they did, they'd go for $350.

Anyway - I have four left from a group buy.
If anybody wants one, there are $280 each or two for $500.
Shipped insured next day delivery.

You don't need a PMMU for your Mac II UNLESS you want to
run A/UX or System 7.0 or the virtual memory init.


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Phil Ronzone   Manager Secure UNIX           pkr@sgi.COM   {decwrl,sun}!sgi!pkr
Silicon Graphics, Inc.               "I never vote, it only encourages 'em ..."
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