Re: A85: Complement the Z flag?

To: assembly-85@lists.ticalc.org
Subject: Re: A85: Complement the Z flag?
From: mgp4007@omega.uta.edu (Michael Pearce)
Date: Sun, 02 Nov 1997 22:16:32 GMT
In-Reply-To: <971102170019_1547286092@mrin44.mail.aol.com>
References: <971102170019_1547286092@mrin44.mail.aol.com>
Reply-To: assembly-85@lists.ticalc.org

On Sun, 2 Nov 1997 17:01:24 -0500 (EST), you wrote:

>To compliment the zero flag, try the following...
>
>ComplimentZ:
>         ld    a,  f
>         xor  %01000000
>         ld    f,   a
>
You cant do operations directly on the flag register, if i'm not
mistaken.

>
>another thought...
>  If you are signaling an error, why not just set it or reset it before you
>return?...(depending on the outcome of the operation.)
>

Because it is the opposite of what i want it to be.  i did something
where i wanted to return on equality (z set), but i wanted the flag to
be low, indicating that the operation failed.  either way, i am now
using the c flag, and it came out better anyway.

>-Michael
>Engineer79@aol.com
>

mgp4007@omega.uta.edu

References:

Re: A85: Complement the Z flag?

From: Engineer79@aol.com

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