Re: A86: calc auto off

To: assembly-86@lists.ticalc.org
Subject: Re: A86: calc auto off
From: ComAsYuAre@aol.com
Date: Mon, 20 Dec 1999 19:49:33 EST
Reply-To: assembly-86@lists.ticalc.org


In a message dated 12/20/99 7:44:33 PM Eastern Standard Time, 
walkingmantis@hotmail.com writes:

> I have been wondering if there was a routine that would automatically turn 
>  the screen off in an asm program if the keys haven't been pressed for x 
>  amount of time. I've seen a few routines, but i need them to work while 
the 
>  calc is looking for a key press, eg. a password. I really need this in my 
>  program because if you accidentally turn the calc on when it asks for a 
pw, 
>  and you put it away while the screen is on, the program will stay on and 
the 
> 
>  batteries will be the innocent victims. Anyway if anyone can help me out 
it 
>  would be really appreciated.
>  

Just have your getkey loop in a timer, like so:

getkey:
 ld bc,1000    ;timer
waitkey:
 halt
 call _getcsc
 or a
 ret nz   ;key pressed
 dec bc
 ld a,b
 or c
 jr nz,waitkey
 ld a,1
 out (3),a   ;turn off calc
 halt
 ld a,11
 out (3),a   ;turn back on
 jr waitkey 


----
Jonah Cohen
<ComAsYuAre@aol.com>
http://linux.hypnotic.org/~jonah/ (down)