Re: A86: FindPixel

To: assembly-86@lists.ticalc.org
Subject: Re: A86: FindPixel
From: rabidcow@juno.com
Date: Wed, 6 May 1998 16:50:48 -0700
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


thanks, that clears things up.
now findpixel makes sense!

-josh

On Wed, 6 May 1998 11:09:30 -0400 (EDT) Dan Eble
<eble@cis.ohio-state.edu> writes:
>
>On Wed, 6 May 1998, Dux Gregis wrote:
>
>> 
>> It moves the bits 0, 1, 2 and 3 of (hl) to bits 4, 5, 6, and 7 of 
>(hl). 
>> It also moves the high bits to where the low one used to be.
>> 
>
>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
>
>

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