Re: A89: roxd

To: assembly-89@lists.ticalc.org
Subject: Re: A89: roxd
From: Olle Hedman <oh@hem.passagen.se>
Date: Mon, 14 Dec 1998 04:29:45 +0100
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
References: <008201be2711$52e020a0$6be0e6a5@Sammy.rutgers.edu>
Reply-To: assembly-89@lists.ticalc.org


I would also recommend everybody to get the programmers reference from motorola.
Then you can check stuff like this up directly instead of asking the list :)

happy coding!
//Olle


Dux Gregis wrote:
> 
> great!  that's what I was hoping :-)  you can only rotate a word though?
> well, it's still very nice
> 
> >
> >roxl and roxr copys the xextend bit into zero.
> >and it is what you should use to scroll.
> >the best way to use it should be a roxr.w (a0)+ (you can only work on words
> >directly in memory)
> >(and ofcourse roxl.w -(a0) to scroll in the other direction)
> >
> >//Olle
> >
> >Dux Gregis wrote:
> >>
> >> how do roxl and roxr work?
> >>
> >> what does, say, roxl copy into bit zero?  the highest bit or the previous
> >> extend bit?
> >>
> >> if it doesn't copy the extend bit, but instead copies the highest bit
> into
> >> the lowest bit like rol, what would be a fast way to scroll the whole
> screen
> >> right or left?

References:

Re: A89: roxd

From: "Dux Gregis" <assets@eden.rutgers.edu>

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