Date: Sat, 17 Oct 1998 15:58:53 -0400 (EDT)
Message-Id: <199810171958.PAA04342@indy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
CC: unreinME AT feist DOT com
In-reply-to: <362838f6.33923440@news.feist.com> (REMOVEunreinME@feist.com)
Subject: Re: mouse mickeys wont go negative
Reply-To: djgpp AT delorie DOT com


> x = 5FFF3, y = FFFB
> x = 5FFDC, y = FFDF

DOS calls return shorts (16 bits), not longs (32 bits).  You can't
just mask off the unused bits; you have to cast it to the
rightly-sized type so that the sign bit is in the right place.

Try:   x=(short)x; y=(short)y;