Re: A86: Re: r register?

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: r register?
From: Jimmy =?iso-8859-1?Q?M=E5rdell?= <yarin@acc.umu.se>
Date: Sat, 17 Oct 1998 04:30:47 +0100
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <006b01bdf972$3e3b3ee0$56e0e6a5@Sammy.rutgers.edu>
Reply-To: assembly-86@lists.ticalc.org


At 22:02 1998-10-16 -0400, you wrote:
>
>
>It's the memory refresh register; it's incremented once every instruction
>(twice in $dd & $fd instructions), so the contents are pretty much random.
>I'm not sure how it works but if this register is not refreshed it, slows
>down the cpu _alot_.

Twice in $ED and $CB instructions as well (note: only twice in $DD $CB
instructions, which is a bit strange). Also, bit 7 is always cleared
as well.

--
Real name:     Jimmy Mårdell
Email:         mailto:yarin@acc.umu.se
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References:

A86: Re: r register?

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

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