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From: mmm@reaper.Chi.IL.US (Michael Marvin Morrison)
Newsgroups: comp.sys.amiga.emulations
Subject: Re:  Mac-system 7.0
Message-ID: <mmm.1469@reaper.Chi.IL.US>
Date: 23 May 91 18:01:24 GMT
References: <4150@jethro.Corp.Sun.COM> <1991May22.090222.2054@bernina.ethz.ch> <1991May22.151659.18851@bmerh2.bnr.ca>
Lines: 32

In article <1991May22.151659.18851@bmerh2.bnr.ca> tessier@bmerh185.BNR.CA (Daniel Tessier) writes:
>
>In article <1991May22.090222.2054@bernina.ethz.ch>,
>wild@nessie.cs.id.ethz.ch (Markus Wild) writes:
>|> In article <4150@jethro.Corp.Sun.COM> lou@flipper.Corp.Sun.COM (Lou
>Ordorica - SunU Field T & D) writes:
>|> >Those of you considering a cpu upgrade should watch out for cheap 68030
>|> >accelerators with no MMU - you lose it's important A-MaxII advantage!
>|>
>|> You won't find any 68030 accelerators without an MMU, the 68030 has it
>|> builtin;-)
>|>
>|> -Markus
>|>
>|> PS: You're right considering 68020 accelerator boards.
>Haha! There ARE boards that have 68030s without the MMU. 68030s that fail
>the MMU tests are sold as "MMU-less" by Motorola, to save money. I know
>that CSA sells 'economy' models based on those chips (they seem to be
>about $100 less than the regular models).
>
>/----------------------------------------------------------------\
>| Dan Tessier		       PHONE   : (613)765-2380		 |

I don't believe that they are '030 uP's that failed any tests..  I seem to 
remember Motorola saying that the TESTING of the MMU was the expensive part,
and so they just masked out part of the MMU logic, and don't bother testing
for it.  It is also declaired as an embeded processor I believe.

--
Michael M Morrison              /|                             |\
mmm@reaper.chi.il.us <or>      | |     Cold Steel on Ice       | |
reaper!mmm@miroc.chi.il.us      \|                             |/