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From: jww@sdcsvax.UCSD.EDU (Joel West)
Newsgroups: comp.sys.mac,comp.lang.c
Subject: Re: C compiler for Mac: responses
Message-ID: <3252@sdcsvax.UCSD.EDU>
Date: Sun, 31-May-87 01:44:21 EDT
Article-I.D.: sdcsvax.3252
Posted: Sun May 31 01:44:21 1987
Date-Received: Tue, 2-Jun-87 01:13:14 EDT
References: <2068@emory.UUCP. <3243@sdcsvax.UCSD.EDU> <6366@dartvax.UUCP>
Organization: Western Software Technology, Vista, CA
Lines: 15
Keywords: Macintosh Aztec Lightspeed MPW C compiler
Xref: mnetor comp.sys.mac:3571 comp.lang.c:2275


On a 68000, 16-bit address displacements are always signed, hence
32k.

MPW's default data segment is 32K.    You can't have more globals
than that (I don't understand if there's a technical reason they
can't support multiple segments or longer segments, or that they
just haven't gotten around to it.)

Having two programs with segments > 32K could be a problem, since
the jump table for cross-segment references only goes 32K in.
-- 
	Joel West
	{ucbvax,ihnp4}!sdcsvax!jww	(ihnp4!gould9!joel if I ever fix news)
	jww@sdcsvax.ucsd.edu	if you must