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
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> 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.