Re: A82: #?%@! Zero Flag! >=(

To: assembly-82@lists.ticalc.org
Subject: Re: A82: #?%@! Zero Flag! >=(
From: ryan.gillespie@juno.com (Ryan N Gillespie)
Date: Sun, 06 Jul 1997 23:43:54 EDT
References: <970703175023_1046699823@emout10.mail.aol.com>
Reply-To: assembly-82@lists.ticalc.org

My coding DID work...it was a flaw elsewhere that made things go a little
haywire. Thanks anyway. Oh, and it can only be xor 255, not 256. There
are 2^8=256, but 0 is considered 1, sooo.. =) xor A crashes my
calculator, btw. Don't know why.

			-Scoobie 

BrettCGI@aol.com writes:
>In a message dated 97-07-03 15:42:06 EDT, you write:
>
><< 				; value of A register is 255
> 	xor 255			; now A is 0
> 	or A            	; update flags - Zero SHOULD be set
> 	jr z, LoopNoDraw	; Relative jump to label LoopNoDraw 
>since
> Zero 				; Flag is set >>
>
>A sure fire way of clearing a is to do this: xor a.  That will clear 
>it.  (I
>think it might have to be xor 256)
>
>-Brett
>Brett CGI@aol.com
>

References:

Re: A82: #?%@! Zero Flag! >=(

From: BrettCGI@aol.com