[A83] Re: time between lcd writes

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: time between lcd writes
From: Grant Miller <iluvmimac@charter.net>
Date: Tue, 4 Feb 2003 15:50:13 -0600
In-Reply-To: <6664.213.65.212.47.1044360088.squirrel@d188.ryd.student.liu.se>
Reply-To: assembly-83@lists.ticalc.org

Keep in mind that not all 83s run at the same speed.  The same LCDBusy 
is used for regular 83 Pluses and the Silvers.  TI's routine will 
produce a long enough delay on a calculator of any speed.

On Tuesday, February 4, 2003, at 06:01  AM, <alh@home.se> wrote:

>> The romcall does not delay x many clocks, it simply reads a port until
>> it indicates the LCD isn't busy.  You can get a rough estimate but I
>> would guess it varies slightly from machine to machine and depending 
>> on
>> batteries and other variables.
>>
>
> It does? It didn't in TI83-, and I assumed it didn't on Ti83+ too, at
> least earlier versions of the rom.Checking the lcd driver for the bit 
> is a bit inefficiant, it would almost
> always be true on the first try because the delay needed isn't very 
> long.on the ti83- it was somewhere around 30-40 clocks. Have heard 
> something of
> it beeing longer on 83+:s though...
> --Olle
>
>
>

References:

[A83] Re: time between lcd writes

From: <alh@home.se>

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