From:	Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Joystick Polling Woes.
Date:	Fri, 6 Feb 1998 18:42:58 +0000
Organization:	None
Distribution:	world
Message-ID:	<2A3OUCAym120EwPB@talula.demon.co.uk>
References:	<34DA37DC DOT 54205A4F AT student DOT umass DOT edu>
NNTP-Posting-Host:	talula.demon.co.uk
MIME-Version:	1.0
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Paolo Piselli writes:
>Anyways, the function reads most of the axes (sp?) correctly for my 
>Gravis Pad, except when I press down (directly down, not diagonally) 
>the y-axis drops below the neutral axis value.

I think the problem is that you are only using 16 bit registers to count
the elapsed time, and on a fast PC these are likely to wrap when the
joystick is in an extreme position. I think you should rewrite this to
use a 32 bit counter.

For some working djgpp code, see the joystick.c and misc.s files from
Allegro.


--
Shawn Hargreaves - shawn AT talula DOT demon DOT co DOT uk - http://www.talula.demon.co.uk/
"Pigs use it for a tambourine" - Frank Zappa

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