Alarm Library v1.0

-------------------------
-- Contents of zipfile --
-------------------------

hpalarm.zip contains:

alarm.lib       : the HP-Alarm library.
alarm.dir       : directory containing all HP-Alarm files.
iferr.lib       : IFERR library from William C Wickes (Goodies Disk #3)
alarm.doc       : this file.

-------------------------
--- Comments ------------
-------------------------

This library (800) will protect your HP when you are absent by pulsing the IR
LED and checking the keyboard for unauthorized use.

To install the HPALARM library, follow the instructions for an auto-attaching
library in the HP User's Guide. As always, backup memory before using.
You must have installed the IFERR library (1793) previously.

When you start the program it will check if the IFERR library is attached to
your HOME path. Then you will be asked to press a key, which will disable the
alarm afterwards.
Now you should place your calculator in front of a solid object and enable the
alarm by pressing any key. You do _not_ need to take off the plastic cover
over the infra-red pair.
HP-Alarm now disables the screen and turns the busy annunciator on and off, so
you can see that HP-Alarm is running.
To disable HP-alarm simply press the specified key. If you press another key
or remove the calc from its place the alarm will be triggered: the words
"ALARM" and "DON'T TOUCH ME" will flash on the screen and the calc will be
very noisy (if you have flag 56 disabled).
I don't know how much HP-Alarm drains your batteries. The IR led is only on
for about 20 microseconds for each second and the screen is disabled, but the
main processor is active all the time.
I've disabled the ON-key by placing the check-loop and the alarm-loop in the
THEN-part of an IFERR command.

I've tested HP-Alarm on my HP48GX Rev.R

-------------------------
--- My first program ----
-------------------------

I own my HP48 for a few months now and I do not know so much about programming
yet. So if you have any comments, please e-mail me.

-------------------------
--- Credits ------------- 
-------------------------

Many thanks to:

BON and BOFF            Turn the busy annunciator on and off.
                        --- Jan Brittenson
                            bson@ai.mit.edu

SCRON and SCROFF        Turn the screen on and off.
                        --- Lutz Vieweg
                            lkv@mania.hotb.sub.org

IRECHO                  Turn on the IR led and check for reflection.
                        --- Wayne Lee
                            waynel@best.com

TRICORDR                The original Tricordr program (not included)
                        --- Steven Ourada
                            sourada@iastate.edu

IFERR.LIB               New IFERR ver. B
                        --- Bill Wickes / HP Corvallis
                            billw@hpcvra.cv.hp.com.

Tips and comments       --- Georg ZOTTI
                            e9126124@student.tuwien.ac.at

-------------------------
--- Copyright notice ----
-------------------------

This is Freeware, copy it freely as long as you give credit where it's due.
There is NO WARRANTY with this software as it is provided to you with no
charge.

--- Alexander Graf
    Alexander_Graf@bammbamm.fido.de
    [FidoNet: 2:2454/130.5]