Re: A86: ldir & lddr scrolling
[Prev][Next][Index][Thread]
Re: A86: ldir & lddr scrolling
Thanks, that will help me alot!
--------------
Jbrett
tbarwick@esn.net
http://ww2.esn.net/~tbarwick
I just added a TI-86 page, Check it out!!!
-----Original Message-----
From: David Phillips <electrum@tfs.net>
To: assembly-86@lists.ticalc.org <assembly-86@lists.ticalc.org>
Date: Wednesday, August 19, 1998 12:33 PM
Subject: Re: A86: ldir & lddr scrolling
>
>Yes, it's the same as scrolling the entire screen. Since the screen is 128
>pixels wide, and each pixel takes up 1/8 of a byte (a bit), there are 16
>bytes per row. To scroll part of the screen, load BC with the number of
>rows to scroll times 16:
>
>ld bc,32 * 16 ; to scroll half the screen
>
>
>At 12:28 PM 8/19/98 -0400, you wrote:
>> Would it be possible to only LDIR and LDDR part of the screen to make
>>only that part of the screen go up and down? --------------
>>Jbrett
>>tbarwick@esn.net
>>http://ww2.esn.net/~tbarwick
>>
>
>--
>David Phillips
>mailto:electrum@tfs.net
>ICQ: 13811951
>AOL/AIM: Electrum32
>
>