Re: A86: FindPixel

To: assembly-86@lists.ticalc.org
Subject: Re: A86: FindPixel
From: Dux Gregis <assets@eden.rutgers.edu>
Date: Wed, 06 May 1998 13:38:06 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <Pine.LNX.3.95.980506105857.12698B-100000@S-103-151.resnet.ohio-state.edu>
Reply-To: assembly-86@lists.ticalc.org


Is this instruction useful?
I mean, why would anyone want to use this?

> Not exactly.  The A register is involved, too.  Here's my cheesy ASCII
> version of the picture in the Z80 databook:
> 
> RLD             +--------------------+
>                 |                    |
>                 |                    V
>        +-----+-----+        +-----+-----+
>      A | 7-4 | 3-0 |   (HL) | 7-4 | 3-0 |
>        +-----+-----+        +-----+-----+
>                 ^             | ^    |
>                 |             | |    |
>                 +-------------+ +----+
> 
> RRD             +-------------+ +----+
>                 |             | |    |
>                 |             V |    V
>        +-----+-----+        +-----+-----+
>      A | 7-4 | 3-0 |   (HL) | 7-4 | 3-0 |
>        +-----+-----+        +-----+-----+
>                 ^                    |
>                 |                    |
>                 +--------------------+
> 
> --------
> Dan Eble (mailto:eble@cis.ohio-state.edu)
>          (http://www.cis.ohio-state.edu/~eble)
> 
> "Behold, how great a matter a little fire kindleth!" -- James 3:5

Follow-Ups:

A86: RLD/RRD (was FindPixel)

From: Dan Eble <eble@cis.ohio-state.edu>

Re: A86: FindPixel

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

References:

Re: A86: FindPixel

From: Dan Eble <eble@cis.ohio-state.edu>