Path: utzoo!yunexus!geac!geaclib!daveb
From: daveb@geaclib.UUCP (David Collier-Brown)
Newsgroups: comp.lang.c
Subject: Re: Different pointer representations on the same machine
Message-ID: <3686@geaclib.UUCP>
Date: 16 Feb 89 13:35:57 GMT
Article-I.D.: geaclib.3686
References: <3675@arcturus>
Organization: GEAC Computers, Toronto, CANADA
Lines: 23

From article <3675@arcturus>, by evil@arcturus.UUCP (Wade Guthrie):
> I have seen references on the net to computers which have different
> representations for different types of pointers (even some computers
> which represent different types of pointers as different sizes).
> Could I have some examples of machines along with the pointer types and
> (if possible) sizes and representations?  Thanks.

  Sure.
  Honeywell DPS-6: word-addressed machine with a facility to use
	an offset (in bytes) into a location specified in words.
	int	*ip ::= a register containing a word address
	char	*cp ::= one register containing a word address
		        another containing an offset
  In larger models the word address could be a register-pair, giving
32 bits for an int *, 48 for a char *.


--dave (the above has changed over time) c-b
-- 
 David Collier-Brown.  | yunexus!lethe!dave
 Interleaf Canada Inc. |
 1550 Enterprise Rd.   | He's so smart he's dumb.
 Mississauga, Ontario  |       --Joyce C-B