Re: A86: cphlde


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Re: A86: cphlde




It doesn't matter what kind of numbers you're using: after you subtract,
if de is greater than hl, the result is negative and the sign flag will
be set.

Dan Eble wrote:
> 
> On Mon, 4 May 1998, Dux Gregis wrote:
> 
> > I disassembled _cphlde ($403c) to find out which flags are set.  I'm not
> > sure how the carry flag is affected, but you can use the sign flag to
> > check for inequalities:
> 
> It works just like a normal cp.  If you're working with signed numbers,
> use the sign flag.  If you're working with unsigned numbers, use the carry
> flag.
> 
> --------
> Dan Eble (mailto:eble@cis.ohio-state.edu)
>          (http://www.cis.ohio-state.edu/~eble)
> 
> "Behold, how great a matter a little fire kindleth!" -- James 3:5


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