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From: peter@sugar.UUCP (Peter da Silva)
Newsgroups: comp.lang.c
Subject: Re: Intel && C (was: Passing (char *) NULL)
Message-ID: <787@sugar.UUCP>
Date: Mon, 21-Sep-87 20:11:36 EDT
Article-I.D.: sugar.787
Posted: Mon Sep 21 20:11:36 1987
Date-Received: Sat, 26-Sep-87 00:38:55 EDT
References: <166@qetzal.UUCP> <157@hobbes.UUCP> <875@bsu-cs.UUCP> <882@mcgill-vision.UUCP>
Organization: Sugar Land UNIX - Houston, TX
Lines: 13
Keywords: MSC,NULL segments
Summary: What a "flat address space" usually means.

It's got nothing to do with the size of the address space. It just means
that any addressible object should be adressed by an object that acts just
like an integer: i.e., you can increment it up to the limit of the
address space, or decrement it to 0, or have a single object as large as
you can fit in your address space.

The reason 64K doesn't seem so cramped on the PDP-11 is that (1) the PDP-11
instruction set is more powerful and allows denser coding than on the 80x86,
and (2) PDP-11 UNIX is usually V7, which is very small and fast by comparison
with later efforts.
-- 
-- Peter da Silva `-_-' ...!hoptoad!academ!uhnix1!sugar!peter
--                 'U`  Have you hugged your wolf today?