From:	Endlisnis <s257m AT unb DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Using Allegro & Assembly language - video descriptor problem
Date:	Sun, 13 Sep 1998 12:18:09 -0300
Organization:	NBTel Internet
Lines:	18
Message-ID:	<35FBE231.6F53E9C7@unb.ca>
References:	<6tgm4b$9fg$3 AT news2 DOT saix DOT net>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Rylan wrote:
> When I have called install_keyboard and install_timer, is there any way to
> still use the segment registers such as ES and DS without GPF'ing the
> program out? I need to be able to use ES and DS as descriptors to video RAM
> using __dpmi_segment_to_descriptor(0xA000) to set them up before using them
> in NASM assembly code - however, after installing the Allegro keyboard and
> timer handlers the program crashes the moment it reaches the line where I
> place the video descriptor in the ES or DS register. Is there anyway around
> this? I suppose this has to do with the fact that the timer routines and /
> or keyboard routines are constantly running and thus must always have valid
> descriptors in them.
	Why can't you use FS?  or GS?
-- 
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT GeoCities DOT com
          Endlis AT nbnet DOT nb DOT ca

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