Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!rutgers!mcnc!unccvax!cbenda
From: cbenda@unccvax.UUCP (carl m benda)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Intel Microprocessors
Message-ID: <789@unccvax.UUCP>
Date: Thu, 6-Aug-87 19:18:11 EDT
Article-I.D.: unccvax.789
Posted: Thu Aug  6 19:18:11 1987
Date-Received: Sat, 8-Aug-87 14:09:01 EDT
References: <1112@lznv.ATT.COM> <399@aucs.UUCP> <3225@cucca.columbia.edu> <234@etn-rad.UUCP>
Organization: Univ. of NC at Charlotte, Charlotte, NC
Lines: 24
Summary: this is why segments

In article <234@etn-rad.UUCP>, jru@etn-rad.UUCP (John Unekis) writes:
> In article <880@bdmrrr.bdm.com> davis@bdmrrr.bdm.com (Arthur Davis x4675) writes:
> 	make use of their opportunity to escape from the Intel tar pit
> 	and use the MC68020 to make the PS/2 into a REAL computer?
> 

Well John, can you say memory management?  Why is it that a 4 meg Mac
can't run a real multitasking operating system?  It has the wonderous
68000 microprocessor.  Awww guess what? it can't manage its own memory.
Segmentation allows the Intel chips to manage their memory.  I suggest
you put a MAC with 4 meg next to an AT with 4 meg of memory running
Microport system V or SCO Xenix and place your bets as to which machine
can start compiling 4 different programs simultaneously.  You see John,
not even the 'powerful' 68020 can run UNIX without the aid of a WHOLE
different chip to aid it namely the 68851 MMU.  Just ask computer engineers
which chip set they'd rather design a computer with.  The MAC II isn't
even a real computer because it can not run a real multi-tasking OS.
at least not without and extra 600.00 chip (68851)

One final note, the 386 has a 1meg segment limit.  What a limit.
What size segmentation would you like?

/Carl
...decvax!mcnc!unccvax!cbenda