HP -41 Manual

HEWLETT
PACKARD
Ki
Automatic Start
and Cassette
Duplication Module
This HP-41 module provides two
important capabilities:
® Automatic start of program execution
when the HP-41 is turned on.
e Duplication of cassettes used in the
HP 82161A Digital Cassette Drive.
These instructions assume an
understanding of the HP-41. Refer to the
owner's handbook for the HP-41 or to the
owner's manual for the HP 82160A HP-IL
Module.
Automatic Start
The automatic start feature provides a
means of writing "fool-proof" HP-41
programs. With the automatic start
module installed, the HP-41 goes through
a special sequence when it is turned on.
This sequence allows you to write
programs which automatically set status,
configure memory, access peripherals, or
prompt the user. The automatic start
feature looks for one of the following three
conditions (in the orderlisted) in an
attempt to start program execution when
the HP-41 is turned on.
® A program labeled RECOVER in
HP-41 main memory.
® A program labeled RECOVER in an
HP-41 port with a lower number than
that of the port containing this module.
® A "write-all" file named AUTOST on
an HP-IL mass storage device.
If a program labeled RECOVERis found,
the HP-41 will start running from
RECOVER.
If RECOVER is not found, the HP-41 will
attempt to load the AUTOSTfile from a
mass storage device in the HP-IL loop.
The "write-all" file named AUTOST
should be recorded with the program
pointer positioned for proper program
execution. A detailed flow chart of the
automatic start process follows:
How Automatic Start Works