Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uunet!mnemosyne.cs.du.edu!isis!ebergman
From: ebergman@isis.cs.du.edu (Eric Bergman-Terrell)
Newsgroups: comp.sys.handhelds
Subject: Control Alarms
Message-ID: <1990Oct31.034301.22601@isis.cs.du.edu>
Date: 31 Oct 90 03:43:01 GMT
Reply-To: ebergman@isis.UUCP (Eric Bergman-Terrell)
Organization: Math/CS, University of Denver
Lines: 24


I wrote a program to automatically adjust my HP48SX for daylight savings
time.  It worked ok when daylight savings began, but bit it when daylight
savings ended on sunday.

The reason:  apparently, when you have a control alarm which sets the
clock back, the alarm will keep triggering, rather than running just
once.

Is this documented anywhere?  I've checked through the manuals and
haven't found anything yet.

Anyway, the solution is to delete the "next" alarm, which is really
the current alarm, after setting the clock back.

<<
-29491200 CLKADJ			/* Fall Back */
DATE FINDALARM DELALARM			/* Delete current alarm */
>>

By the way, I'm just pointing out the behavior of the calculator.  I am
not calling this a bug in the HP!

Terrell