Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!van-bc!
From: lphillips@lpami.wimsey.bc.ca (Larry Phillips)
Newsgroups: comp.sys.amiga
Subject: Re: Software-only network protocol standards
Message-ID: <682@lpami.wimsey.bc.ca>
Date: 31 Jul 89 22:23:42 GMT
Lines: 25
Return-Path: <lpami!lphillips>
To: van-bc!rnews

In <1993.AA1993@geo-works>, bryan@geo-works.UUCP (Bryan Ford) writes:
>In article <117428@sun.Eng.Sun.COM>, cmcmanis%pepper@Sun.COM (Chuck McManis) writes:
>>This is a bogus assumption. The Sun-1 was a 68000 and the Sun-2 was a 68010.
>>The latter was running at 12Mhz I believe. But it did have memory management.

>I stand corrected.  Please clarify 'memory management':  You don't include
>memory protection, do you?  How could a pre-68020 provide memory protection
>unless it has some special protection hardware?  (Did it?)

One of the founders of Sun (Andy Bechtelscheim I believe), developed an MMU,
implemented in hardware.  In fact, you could say that the development of the
MMU was a very important factor in the decision to start the company.  If you
squint just a little bit, and look at Sun's MMU, and if the light is just
right, you will see remarkable similarities to the Motorola MMU, both the 68851
and the built-in one in the 68030.

-larry

--
"So what the hell are we going to do with a Sun?" - Darlene Phillips -
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|   //   Larry Phillips                                                 |
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