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From: lalonde@nicmad.UUCP (John Lalonde)
Newsgroups: comp.sys.mac
Subject: Re: 68030 in MacII
Message-ID: <1969@nicmad.UUCP>
Date: Fri, 11-Sep-87 09:18:49 EDT
Article-I.D.: nicmad.1969
Posted: Fri Sep 11 09:18:49 1987
Date-Received: Sat, 12-Sep-87 18:14:09 EDT
References: <2549@okstate.UUCP>
Reply-To: lalonde@nicmad.UUCP (John Lalonde)
Organization: Nicolet Instrument Corp.  Madison, WI
Lines: 25
Keywords: 68030 MacII

>"Mac II is designed so this new chip [the 68030] will pop right in to
>replace the 68020."
>
>of the 68030 the pinouts would not match.  Would any enlightend hardware
>person like to comment on this?  Are the pinouts the same (implying that
>the "Harvard style parallel architecture" is not seen off chip)?

I am not an enlightened hardware person but I do have pinout info on the 68030
from Motorola.

The 68020 and the 68030 do *NOT* have the same pinout. I believe that Apple
tried to come up with an architecture which will allow 68030 based designs.
It may be possible to design a 68030 daughterboard that plugs into a
68020 socket but that would take an enlightened hardware person to give
an answer for that. :=}  I don't think Apple has ever said, implied or
hinted that the Mac II's 68020 could be directly replaced by a 68030. If they
did they are misleading people. If you want a real 68030 based system that
does not use some type of kludge daughterboard, you will have to wait
for the next machine in the Mac II architecture family.

-- 
John LaLonde
Systems Engineering Group
Nicolet Instrument Corporation
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