Re: A85: Complement the Z flag?
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Re: A85: Complement the Z flag?
Michael Pearce wrote:
>
> Does anyone know of a good way to complement the zero flag?
Interesting problem indeed... although I can't really see when
that's necessary.
push af
ex (sp),hl ; to preserve HL
ld a,%01000000 ; Z flag is the 6th bit in the F register
xor l ; L = previous F register
ld l,a
ex (sp),hl
pop af ; 8 bytes
No registers or flags are changed, except the Z flag.
--
Jimmy Mårdell "The nice thing about standards is that
mailto:mja@algonet.se there are so many of them to choose from."
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somewhere!"
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