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From: daveh@cbmvax.UUCP (Dave Haynie)
Newsgroups: comp.sys.amiga
Subject: Re: Commodore New Products/Price Reductions COMDEX Announcements
Message-ID: <8790@cbmvax.UUCP>
Date: 1 Dec 89 20:24:34 GMT
References: <3316@jarthur.Claremont.EDU>
Organization: Commodore Technology, West Chester, PA
Lines: 24

in article <3316@jarthur.Claremont.EDU>, aleneis@jarthur.Claremont.EDU (Tony Leneis) says:

> In article <787@crash.cts.com> lgreen@pnet01.cts.com (Lawrence Greenwald) writes:

>>68030  =  68020 CPU + BUILTIN 68851 MMU!!!

>>Adding another '851 is a waste of silicon and board space!!

> 	If I remember correctly, the 68030 has an on-board MMU, but it isn't
> as powerful as a full 68851 (doesn't support disk swapping for instance.)

Of course it supports swapping to disk.  The main differences are that they 
cut out some of addressing modes for various instructions, and a few other
things. In general, the differences don't matter -- things like UNIX, or
SetCPU, just use the common subset of features.  The '030 actually adds a
couple of things too.

> Tony Leneis
> aleneis@jarthur.claremont.edu
> aleneis@hmcvax.bitnet
-- 
Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests"
   {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: hazy     BIX: hazy
                    Too much of everything is just enough