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Path: utzoo!watmath!clyde!bonnie!akgua!ganehd!bwc
From: bwc@ganehd.UUCP (Brantley Coile)
Newsgroups: net.arch
Subject: Re: I like segmented architectures
Message-ID: <206@ganehd.UUCP>
Date: Wed, 5-Jun-85 12:06:10 EDT
Article-I.D.: ganehd.206
Posted: Wed Jun  5 12:06:10 1985
Date-Received: Sat, 8-Jun-85 02:22:12 EDT
References: <276@spar.UUCP> <5653@utzoo.UUCP>
Reply-To: bwc@ganehd.UUCP (Brantley Coile)
Organization: NE Health District, Athens, Georgia
Lines: 16
Summary: 


One thing issue I haven't seen mentioned, or I have missed it, is
that in the '86 family of processors the memory mapping is known
to the user program.  On most systems only the supervisor knows about
the memory mapping and the user program just thinks it has
so much space.   Even the seperate I and D space on a pdp-11
didn't require the knowledge of the user program.  The iNTEL segments
are just big versions of the 4k addressing problem on the IBM mainframes 
except on the IBM you can use 24bit pointers.


-- 

		Brantley Coile CCP
		..!akgua!ganehd!bwc
		Northeast Health District, Athens, Ga