Re: A86: I've got questions about registers and interupts, maby someone

Re: A86: I've got questions about registers and interupts, maby someone can aswer?

To: assembly-86@lists.ticalc.org
Subject: Re: A86: I've got questions about registers and interupts, maby someone can aswer?
From: Stephen Hicks <shicks@MindSpring.Com>
Date: Fri, 02 Jan 1998 02:44:26 -0500
References: <199801020312.TAA03968@belize.it.earthlink.net>
Reply-To: assembly-86@lists.ticalc.org

I think it keeps the low bit always either set or clear, and increases it by 2
each time, because it reads a word from each mem location to refresh it, so it
doesn't have to go up by one.  (so you _could_ store a boolean on r if you
wanted to, but it'd be pretty pointless)

Dennis Munsie wrote:

> >
> >The R registers is updated after every instruction as I recall. Also,
> >I think it's increased with one after each instructions, but the
> >last bit is always clear (thus in range 0-127). I think I checked this
> >out once, but I'm not sure.
> >

--
Stephen Hicks
mailto:shicks@mindspring.com
UIN:5453914
AIM:Kupopo1

References:

Re: A86: I've got questions about registers and interupts, maby someone can aswer?

From: Dennis Munsie <munsie@earthlink.net>