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Article #1804

24 bit pointers

#1804
From: Mike McNamara
Date: Mon, 01 Jan 1990 21:41
28 lines
1741 bytes
	As RMS asked that requests for long term features go here, I
wish to echo requests for support for greater than 16Mbyte addressing.

	Most of the machines I use at work have 128Mbyte of physical
memory.  My main task right now is verifing new chip designs, which we
do via a simulation language, and test scripts.  The output of these
scripts can easily get up to 20-25 megabytes.  I have to use vi to
look at these files!!!!  This is an embarassment.

	I am quite aware of the memory limitations of the current
memory allocation scheme of emacs; I used to use a Sun 3/50. I would
strongly support any effort to remedy the memory behavoiur of emacs.
However, I eliminated this problem for me personally to a large extent
by porting emacs to the Ardent machine, and using it to run emacs.

	I would be quite willing to suffer making pointers 64 bits,
with 32 bits of tag information. People, even emacs mavens, who have
emacs running for weeks, might have half a million Lisp Objects
running around.  Better to require a million bytes to describe these
objects, then arbitarily limit the total size of all the objects
described to 16 Mbytes.

	Especailly when there are 4 gigabytes of addressable space!!


--
Michael McNamara	(St)ardent, Inc.		mac@ardent.com
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From: mac@rhea.ardent.com (Mike McNamara)
Newsgroups: gnu.emacs.bug
Subject: 24 bit pointers
Message-ID: <MAC.90Jan1134130@rhea.ardent.com>
Date: 1 Jan 90 21:41:30 GMT
Sender: news@ardent.UUCP
Reply-To: mac@ardent.com (Michael McNamara)
Distribution: gnu
Organization: Ardent Computer Corporation, Sunnyvale, CA
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