Date:	Wed, 9 Apr 1997 13:35:22 +0300 (IDT)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To:	Peter Steele <ps13 AT ic DOT ac DOT uk>
cc:	djgpp AT delorie DOT com
Subject:	Re: Mouse graphics
In-Reply-To:	<334A816F.F058107@ic.ac.uk>
Message-ID:	<Pine.SUN.3.91.970409133426.3639R-100000@is>
MIME-Version:	1.0

On Tue, 8 Apr 1997, Peter Steele wrote:

>    r.x.dx = (__tb & 0x000fffff) & 0xffff;
>    r.x.es = (__tb & 0x000fffff) & 0xffff0000 >>4;

This is incorrect and also unnecessarily complicated.  Just say so:

   r.x.dx = __tb & 0xf;
   r.x.es = (__tb >> 4) & 0xffff;

I didn't test your program after this correction, so I cannot
guarantee that this is the only problem.  But it corrects at least one
error in your code which shifts left 0xffff0000 instead of __tb,
because the precedence of the >> operator is higher than that of &.

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