Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hoptoad!tim
From: tim@hoptoad.uucp (Tim Maroney)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Low memory globals from C (Was RE:  Finding Screensize under MF)
Message-ID: <9672@hoptoad.uucp>
Date: 14 Jan 90 11:11:43 GMT
References: <10139@saturn.ucsc.edu> <9429@hoptoad.uucp> <1102@urbana.mcd.mot.com> <10276@saturn.ucsc.edu> <9623@hoptoad.uucp> <4615@helios.ee.lbl.gov>
Reply-To: tim@hoptoad.UUCP (Tim Maroney)
Organization: Eclectic Software, San Francisco
Lines: 22

In article <9623@hoptoad.uucp> tim@hoptoad.uucp (Tim Maroney) writes:
>#To access low-memory globals from C, if you must, you use the macro
>#preprocessor.  For instance, you would say
>#
>##define CurrentA5 (*(long *)0x904)

In article <4615@helios.ee.lbl.gov> beard@ux1.lbl.gov (Patrick C Beard) writes:
>A cleaner way to do low memory globals from THINK C is the ':' notation.
>
>extern Ptr CurrentA5 : 0x904;
>
>This method gives you do type checking if you want.

So do the macros; the expression has a type.  I don't think it's "clean"
to add new language features when existing ones will do just as well.
-- 
Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

"Every year, thousands of new Randoids join the ranks.  Most tend to be either
 too-rich self-made tycoons or picked-on computer nerds (the romantic, heroic
 individualism of Rand's novels flatters the former and fuels the latter's
 revenge fantasies)." -- Bob Mack, SPY, July 1989