AVR-Chat

A = A XOR B
B = B XOR A
A = A XOR B 
 
-----Original Message-----
From: Zack Widup <w9sz@prairienet.org>
To: AVR-Chat@yahoogroups.com
Sent: Thu, 9 Jun 2005 12:45:19 -0500 (CDT)
Subject: Re: [AVR-Chat] Re: Challenge


I could argue that you're using another register for that!  :-)

(I have used that on rare occasions though).

Zack


On Thu, 9 Jun 2005, James Hatley wrote:

> Roll through carry.
> 
> Jim
> 
> >
> > This one is known but can prove a puzzler if one doesn't know it.
> >
> > How do you swap the contents of 2 registers without using any other
> registers or
> > stack?
> > --
> > Ralph Hilton



 
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