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From: andyp@treehouse.UUCP (Andy Peterman)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Color hilite
Keywords: LDEF, Color hilite
Message-ID: <653@treehouse.UUCP>
Date: 23 Nov 90 18:29:41 GMT
References: <3170@cernvax.cern.ch>
Organization: The Tree House
Lines: 25

In article <3170@cernvax.cern.ch> marty@cernvax.cern.ch (hugues marty) writes:
>I would like to know if it is safe to use this HiliteMode low-memory
>global to perform color hilite. Does it work under A/UX where using
>low globals should be avoided? I never found any reference to this
>HiliteMode byte in IM. Is there any "official" documentation
>somewhere?

I've been using the low-memory HiliteMode for years in a few
applications with no problems.  They continue to run fine under A/UX and
7.0.  In A/UX, they have somehow created a low memory global space
where it's legal to at least read and, in some cases like this one,
write to these globals.  IMHO, I think this will be legal at least until
System 8.0, which probably won't be in our lifetime :-).

Check out IM vol V, page 61-62 for the "official" documentation.

By the way, if you use MPW C 3.0 or newer, you can declare a function
that does the bit clear with the following:

	void HiliteMode(void) = {0x08B8, 0x0007, 0x0938};

-- 
Andy Peterman                       |   Opinions expressed
treehouse!andyp@gvgpsa.gvg.tek.com  | are definitely those of
(916) 273-4569                      |      my employer!