Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!polyslo!dorourke
From: dorourke@polyslo.CalPoly.EDU (David M. O'Rourke)
Newsgroups: comp.sys.mac.programmer
Subject: Re: System 7.0 questions
Message-ID: <12254@polyslo.CalPoly.EDU>
Date: 3 Jul 89 20:13:14 GMT
References: <42778@tiger.oxy.edu>
Reply-To: dorourke@polyslo.CalPoly.EDU (David M. O'Rourke)
Organization: Cal Poly State University -- San Luis Obispo
Lines: 30

In article <42778@tiger.oxy.edu> hammersslammers1@oxy.edu (David J. Harr) writes:
>a PMMU. My question is: Are Plus and SE owners forever doomed to have no
>more than 4 Mbytes of memory?

  Probably, the Plus & the SE don't have the necessary circuitry to handle
the 4 meg chips.

>to use the new 4 Mbyte high density SIMMs, allowing them 14 Mbytes under 24
>bit and 16 Mbytes under 32 bit addressing? 

  the Plus & the SE can't do 32 bit addressing, they can only do 24-bit
addressing.  Also the reason that the plus & the SE can't do virtual
memory is because the 68000 can't do virtual memory {no flames please for
weird solutions, any resonable 68000 system can't do it}.

>an evolutionary dead end and are totally limited to 4 Mbytes.

  I wouldn't call them dead yet, but I think they might be up for retirement.
The 68000 is missing a lot of the key features in the new 020, 030, & 040 :-)
that will be required to take advantage of newer and hopefully better
software.

  That is of couse assuming that RISC chips don't take over the world :-)

  Hope this helps.
-- 
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David M. O'Rourke____________________|_____________dorourke@polyslo.calpoly.edu
|  God doesn't know, he would have never designed it like that in the first   |
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