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Section 7: Simple Programming 119
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Remember that the HP-41C will automatically insert an
END for you when you press
GTO · · .
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When you press
GTO · ·
to begin a new program, the new instructions are added after the last
END instruction in program memory. The HP-41C makes
program memory management so easy that you need not worry about where
programs are positioned in program memory. Just press
GTO · ·
before you begin each program and the positioning is done for you.
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There is a permanent END located at the current bottom
of program memory. It cannot be deleted and instructions cannot be inserted
after it. For this reason, even though the basic HP-41C actually has 64
registers, a portion of one register is consumed by the permanent
END , designated
.END. when displayed. Thus you
see 00 REG 46 when you press
GTO · ·
the first time.
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For the purpose of this book, a
‘‘program’’ or a ‘‘program file’’
is everything between (and including) the initial LBL for the program and the
END of the program.
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Clearing Programs
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You can clear any program you have loaded into program memory by simply
executing CLP (clear program) and specifying
the program name.
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CLP clears all instructions of a program including
the program label and the program’s END
instruction. For this reason, it is important to include
END instructions in your programs. For example, if
program memory looked like this ...
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... and you cleared TEST1, all of the instructions from line 00 of
TEST1 down to the first END (if one existed)
would be cleared. But if you include
END instructions, you can
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