Re: LZ: Screen Reversing...


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Re: LZ: Screen Reversing...



> Date:          Thu, 10 Oct 1996 00:02:07 +0200 (EET)
> From:          Ilkka Neuvonen <pdx@kontu.bbs.fi>
> To:            list-zshell@lists.ticalc.org
> Subject:       Re: LZ: Screen Reversing...
> Reply-to:      list-zshell@lists.ticalc.org


> 
> > > What might work is the cpl instruction.  Hope this helps!
> > > 
> > > Ben
> > > shakal@ns.net
> > 
> > You can just xor the byte with $FF:
> 
> But that would take 1 extra byte, wouldn't it? (ok, ok, so it won't 
> shatter nations, or anything but if you're planning on like doing it a 
> 1000 times, it counts...)
> 
> 
>    Pyrone


And xor $FF takes 3 more CPU cycles than CPL (which takes 4)!!!!! :)


Ben
shakal@ns.net


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