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From: david@daisy.UUCP (David Schachter)
Newsgroups: net.micro.68k
Subject: Re: 32 vs. 24 Bit Addresses
Message-ID: <75@daisy.UUCP>
Date: Wed, 27-Feb-85 06:09:49 EST
Article-I.D.: daisy.75
Posted: Wed Feb 27 06:09:49 1985
Date-Received: Sun, 3-Mar-85 03:35:15 EST
References: <342@oakhill.UUCP>
Reply-To: david@daisy.UUCP (David Schachter)
Organization: Daisy Systems Corp., Mountain View, Ca
Lines: 29
Summary: 


Mr. Cruess (of Motorola) states that, in his experience, 24 bit addresses are
a bit squeezed and that 28 bits is better.  Therefore, he concludes, the
MC68020 is better than the NS32032.  In my experience, 24 bits is big enough
to hold us workstation vendors until late 1987 or 1988.  Until then, given
the real-world capabilities of microprocessors (as opposed to the claims of
the marketing departments of the microprocessor vendors), anyone worrying
about putting >16 MB on a microprocessor is wasting time.  You wouldn't
put a 300 gallon gas tank in a Honda Civic, would you?  It would be overkill.

By the time you need >16 MB in a workstation, National Semi will either have
a part to handle your needs or be bankrupt.  Until then, the NS32032 gives you
what you want (as does the Intel 80286) without paying for extra, unneeded
address pins and without wasting expensive printed circuit board real estate,
tranceivers, etc.

If you want to claim that a microprocessor can run multiple users and therefore
should be held to the trends in super-minis, go ahead.  I don't believe it.
One CPU = One User, in the micro world.  My CPU cycles are MINE and you will
have to pry them from my cold, dead keyboard before I'll give them up willingly.

Daisy's customers won't need more than 16 MB until late 1987 or 1988.  Until
then, the NS32032 and the Intel 80286 are fine.  The MC68020 is overkill.

[The opinions expressed above are my own.  Daisy Systems bears no responsibility
for them.  I have no connections whatsoever to Intel, Motorola, or National
Semiconductor.  I have no connections to anyone.  Everybody hates me.]
{If one man calls you an ass, ignore him.  If two men call you an ass, get a
saddle.}