Re: A86: batt checker

To: assembly-86@lists.ticalc.org
Subject: Re: A86: batt checker
From: ComAsYuAre@aol.com
Date: Tue, 1 Dec 1998 16:19:09 EST
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org


In a message dated 12/1/98 16:16:15 Eastern Standard Time,
assets@eden.rutgers.edu writes:

> I'm talking about Kirk Meyer's routine.  I was never really following the
>  thread and thought that this is what you were trying to determine.
>  But anyhow, here's what the ROM does: it puts a value out port one that
sets
>  up a mask for a keypress, then it checks a little later to see if the mask
>  is still effective; if the mask runs out of time, it means that the cpu is
>  running at good speed, if not, then the cpu is operating much slower than
>  the hardware on port 1.  That explains why certain keypresses will diplay
>  the battery message when the calc is turned on.  This is only the routine
>  used to check batteries when the calc is turned on, it looks like there are
>  other times when the calc might do other things to check battery level.


what other times does it check the battery level?  any of them more accurate
than that one?