Date:	Sun, 3 Jan 1999 10:36:14 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender:	eliz AT is
To:	François Poirier <fpoirier AT aei DOT ca>
cc:	djgpp AT delorie DOT com
Subject:	Re: Selector and linear frame buffer
In-Reply-To:	<368BCC31.BBD0F6C1@aei.ca>
Message-ID:	<Pine.SUN.3.91.990103103540.12860A-100000@is>
MIME-Version:	1.0
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Reply-To:	djgpp AT delorie DOT com

On Thu, 31 Dec 1998, François Poirier wrote:

>  tried to make a selector like this:
> and it dosen't work? And how do I access it am I correct?

There are several working examples in section 18.4 of the FAQ, aren't
they enough to get you started?

>   __dpmi_set_segment_limit(video_selector, 2000000L);   /* 2 Megs */

The limit should be 1 less than the size.  Also, 2000000 is NOT
2MBytes.

Why do you need a 2MB-large segment for video?  Also, you never say
what base address did you use for the segment.

And last, don't forget to check the errors reported by these
functions!

> For accessing it:
> _farpokeb(video_selector, (int)rand()%639 * Max_X + (int)rand()%479,
> (char)rand()%255);

This is correct (though you probably mean 640 and 480, not 639 and
479).

What problems did you see?

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