From:	chris doty <orz AT wpi DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: !!NEGATIVE NUMBERS IN ASM!! Pleez answer.
Date:	Wed, 18 Feb 1998 14:39:44 -0800
Organization:	Worcester Polytechnic Institute
Lines:	8
Message-ID:	<34EB6330.2388@wpi.edu>
References:	<34EB3694 DOT 714183B6 AT mail DOT htk DOT fi>
NNTP-Posting-Host:	orz.res.wpi.net
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

> I just want to know, how I can change a number, which is negative, to
> positive,
> and in asm. I bet it can be done, but how?
>  I've got an almost ready cool demo-effect, but when I add two numbers
> together,
> the other one is negative, and I can't do anything about it.
x86s have hardware support for flipping the sign.  I believe mnemonic is
NEG.  This is equivelent to a NOT followed by an INC.

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