[A89] Re: Setting bit fields

To: assembly-89@lists.ticalc.org
Subject: [A89] Re: Setting bit fields
From: the_juggernaut@juno.com
Date: Sun, 3 Mar 2002 17:33:03 -0600
Reply-To: assembly-89@lists.ticalc.org


My question was this: why do you want to set and then immediately clear
(or vice versa) a bit?  Now that I think about it, it's probably because
we're sending a single blip to the output.  But I don't know how the link
port works at all, and hence the question.

jk

On Sat, 02 Mar 2002 23:35:47 +0100 Olle Hedman <alh@home.se> writes:
> 
> At 23:40 2002-03-01, you wrote:
> 
> >Why do you need to do an AND and an OR? To set bit 6, you just 
> need:
> 
> you answered your own question. the and for clearing, and the or for 
> setting.
> its not always (is it even often?) that you only want to clear or 
> only want 
> to set bits.
> if it isn't just a few, and then its better with bset and bclr 
> anyway.
> 
> ///Olle
> 
> 
> 
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