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From: rpw3@amdcad.UUCP
Newsgroups: comp.os.minix
Subject: Re: Minix and compiler models
Message-ID: <14659@amdcad.UUCP>
Date: Sun, 8-Feb-87 06:07:37 EST
Article-I.D.: amdcad.14659
Posted: Sun Feb  8 06:07:37 1987
Date-Received: Mon, 9-Feb-87 02:44:38 EST
References: <966@ulowell.cs.ulowell.edu> <1565@cit-vax.Caltech.Edu>
Reply-To: rpw3@amdcad.UUCP (Rob Warnock)
Distribution: world
Organization: [Consultant] San Mateo, CA
Lines: 20
Keywords: stacks

Well, there have been machines in which the stack grew upwards (and to
avoid any more of this silly re-interpretation, by "up" I mean in the
direction of higher addresses in memory, not up, down, or sideways on
a piece of paper).

On the PDP-8, the PDP-10, and the IBM-360 (before C came around),
stacks grew up (the PDP-10 had hardware push and pop, the other didn't).

To my knowledge, the PDP-11 was the first machine in which stacks went
the "wrong" way (from the "traditional" point of view). Later, people
figured out that it made more sense on a 360 for the stacks to go the
other way.


Rob Warnock
Systems Architecture Consultant

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