HP HP-65 - Calculating Manually

program handle the busy part of the calculation. Typically, you
just key in the data and start the program running. The program
stops when it needs more data or when it displays a result.
3. To Create, Record, and Execute Your Own Programs
No prior programming experience is necessary to program the
HP-65. You can easily define the five zop row keys to calculate
functions of your own creation for use alone or with other pro-
grams. You plan your problem in terms of the keystrokes needed
for calculation and the additional keystrokes needed to control
your program. You set the mode switch to W/PRGM position
and key the keystroke sequence into memory. You may then re-
cord your program for future re-entry by merely passing a mag-
netic card through the calculator. Upon switching back to RUN
mode, you can execute your stored program.
In this introduction, we will briefly demonstrate these three
methods. We suggest that you do the examples to confirm that
your calculator works properly and to become familiar with it.
1. Calculating Manually
Getting Started
Your HP-65 Pocket Calculator is shipped fully assembled includ-
ing a battery. Before using the calculator for portable use, charge
it for 14 hours as described in Appendix C. You may run the
calculator on battery power alone or you may connect the battery
charger and run while the battery is charging. To get started:
= Set W/PRGM —RUN switch to RUN position.
®= Turn OFF—ON switch to ON position.
You should now see displayed [lili}; if not, please turn to Ap-
pendix C.
Keying In Numbers
Key in the number and include the decimal point if it is a part
of the number. For example, try keying in 314.32 which would
be done by merely pressing:
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