Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!jarthur!uunet!sco!seanf
From: seanf@sco.COM (Sean Fagan)
Newsgroups: comp.arch
Subject: Re: True 46 Bit Addressing with 586?
Keywords: Intel 586
Message-ID: <8883@scolex.sco.COM>
Date: 20 Nov 90 22:31:53 GMT
References: <21691@well.sf.ca.us> <8833@scolex.sco.COM> <17126@netcom.UUCP>
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Distribution: comp
Organization: The Santa Cruz Operation, Inc.
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In article <17126@netcom.UUCP> feustel@netcom.UUCP (David Feustel) writes:
>I doubt even one fullsized 386 segment can be used on a 386 since at
>least 2 segments are required to execute in protected mode; however,

Obviously, you cannot have more than one complete segment in memory at once.
However:  you *can* page portions of each segment out of memory.  The
problems (that I alluded to) come into play when you have to manage the
pages.  You need to mark lots and lots of pages as not-present, and, when you
do swap them in, you need to make sure that no other segment has that
physical location marked as belonging to it.  Basicly, what you have now,
but on a far larger order.

I won't get into what happens when you have more than one task, though...

-- 
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