Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!oakhill!motaus!skipper
From: skipper@motaus.sps.mot.com (Skipper Smith)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Info
Message-ID: <1991Apr10.161618.19738@motaus.sps.mot.com>
Date: 10 Apr 91 16:16:18 GMT
References: <1991Apr5.194147.25387@uokmax.ecn.uoknor.edu> <1991Apr9.153404.21751@sagpd1>
Organization: Motorola Semiconductor, Austin, Texas
Lines: 39

In article <1991Apr9.153404.21751@sagpd1> monty@sagpd1.UUCP (Monty Saine) writes:
>In article <1991Apr5.194147.25387@uokmax.ecn.uoknor.edu> drtiller@uokmax.ecn.uoknor.edu (Donald Richard Tillery Jr) writes:
>>
>>>    o There seem to be two versions (if not more) of '030's floating
>>>      around these days. There is the MMU and non MMU.
>>
>>?????????  I haven't heard of a 68030 without the MMU.  That would probably
>>be a totally different number (68020? :-)
>>
>
>    I am not sure of the numbering, but... The Makers of the midget Racer came
>    to our users group in March and announced a "users group special" version
>    of the new midget racer that had a "special" 68030 that had no MMU. They
>    were working with Motorola and this product and had been given a good
>    price that they were passing on to us. ($695.00 for the basic new midget)
>    I can't remember the real name for the new Midget racer :) Anyway this
>    board had a pin compatible '030 clone that could be updated when ever
>    the need for the MMU became apparent.
>
>
>    For what it's worth,
>    This was NOT at our APRIL meeting!!!!!!!!!
>
>    Monty Saine

The chip you are talking about is not an '030 clone and it is not an '020.  It
is a rehash of the '030 that has metal-masked out the MMU by permananently
disabling it.  The MMU is still there (for now, at least), but it is not     
powered (actually, there is some debate about that.  It may still be powered)
or tested.  Because the MMU normally takes a great deal of time to test and
time is money, since we don't have to test it we pass those savings on to the
people who buy the chip.  It is in every other way an '030, though.  The part
number is MC68EC030 where the EC stands for embedded control- a computer 
application that almost never needs an MMU but always need to be as cheap as
possible.  This is a standard Motorola part.
-- 
Skipper Smith                             | skipper@motaus.sps.mot.com
Motorola Technical Training               | 8945 Guilford Rd  Ste 145  
All opinions are my own, not my employers | Columbia, MD 21046