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From: dan@rna.UUCP (Dan Ts'o)
Newsgroups: comp.sys.ibm.pc
Subject: Large linear memory space for 80x86 machines ?
Message-ID: <668@rna.UUCP>
Date: Mon, 19-Oct-87 02:36:23 EDT
Article-I.D.: rna.668
Posted: Mon Oct 19 02:36:23 1987
Date-Received: Tue, 20-Oct-87 00:37:17 EDT
Organization: Rockefeller Neurobiology
Lines: 27


	Sorry if this has been covered (it surely has) but...

	What is the current state of large data array usage on 80x86 machines ?
I want to write a (semi-real-time) C program that uses single data arrays that
are 2-8Mb each. What about...

	- Huge model on the MSC 4.0. Will this do the trick ? Sounds like it
will but the speed penalty may be huge (heehee). One program I moved from
small to large was slowed by 50%. But it may still be limited by the 640K
of MSDOS.

	- Running Xenix with protecte mode, possibility on a '386. Do any
current or planned implementation of Xenix support such large linear address
spaces ? How about virtual memory support ?

	- 68000 co-processor or other on the PC bus. I suppose this is an
option to gain large linear data spaces on the PC chassis.

	Any other ideas ? Thanks.

				Cheers,
				Dan Ts'o
				Dept. Neurobiology	212-570-7671
				Rockefeller Univ.	...cmcl2!rna!dan
				1230 York Ave.		rna!dan@nyu.arpa
				NY, NY 10021