Re: A85: Complement the Z flag?
[Prev][Next][Index][Thread]
Re: A85: Complement the Z flag?
I promise it is necessary! i am using the z flag like you normally
would the carry flag to return status information from a function.
-mike
On Sat, 01 Nov 1997 03:14:51 -0800, you wrote:
>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."
>http://www.algonet.se/~mja
>IRC: Yarin "Sanity? I'm sure I have it on tape
>somewhere!"
>
mgp4007@omega.uta.edu
References: