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From: beard@ux1.lbl.gov (Patrick C Beard)
Newsgroups: comp.sys.mac.programmer
Subject: Low memory globals from C (Was RE:  Finding Screensize under MF)
Summary: easier, nicer than macros
Message-ID: <4615@helios.ee.lbl.gov>
Date: 12 Jan 90 20:51:32 GMT
References: <10139@saturn.ucsc.edu> <9429@hoptoad.uucp> <1102@urbana.mcd.mot.com> <10276@saturn.ucsc.edu> <9623@hoptoad.uucp>
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Reply-To: beard@ux1.lbl.gov (Patrick C Beard)
Organization: Lawrence Berkeley Laboratory, Berkeley
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X-Local-Date: 12 Jan 90 12:51:32 PST

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)

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.
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-  Patrick Beard, Macintosh Programmer                        (beard@lbl.gov) -
-  Berkeley Systems, Inc.  ".......<dead air>.......Good day!" - Paul Harvey  -
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