RE: A89: How do you change the logical screen width?

To: assembly-89@lists.ticalc.org
Subject: RE: A89: How do you change the logical screen width?
From: zach <zach@operamail.com>
Date: Thu, 22 Jul 1999 13:30:56 -0400
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-89@lists.ticalc.org
Reply-To: assembly-89@lists.ticalc.org


>===== Original Message From assembly-89@lists.ticalc.org =====
>600012:5..0  (64-n)*16 = Number of pixels wide the LCD controller thinks
>             the LCD is. if changed to something else, $60001c should be
>             modified TO some apropriate value to set the 
ROW-change-frequency
>             to something that matches the number of horisontal pixels
>                                                                  default $31
>
>you dont have to change $60001c if you change to something lower than 
240pixels,
>but you you will probably have problems with grayscale if you don't...
>another bad thing is that VTI does not support this feature, so all 
developement
>with different screen with has to be done oncalc.
>
>//Olle
So I guess I should write $36 to bits 5..0 of $600012 to change it from 240 to 
160, but what value should I write to $60001c? Also, should I change $600013 
(# of LCD scan-lines) to 100 by writing $9c there? Do I have to change the 
values back when I'm done, or will the defaults restore when I go back to 
TI-OS? More help from you TI-89 gurus would be great.

OOOOOOOOOOOOOOOOOO
Zach Miller
Madison,Wisconsin
OOOOOOOOOOOOOOOOOO

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