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Section 2: Display Control 37
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01234 Flag Status Annunciator
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If flags 0, 1, 2, 3, or 4 are set in a program or from the keyboard, the
corresponding display annunciator turns on. A flag annunciator showing in the
display indicates a set (true) flag. Don’t worry about flags yet—they
are covered in detail later in this handbook.
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Shift Key Annunciator
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Any time you press the g
(shift) key, the SHIFT annunciator turns on.
The annunciator turns off again when you press
g or the shifted function
is executed.
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PRGM (Program) Mode Annunciator
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Pressing PRGM places the HP-41C into PRGM (program) mode
and turns on the PRGM annunciator.
Pressing PRGM again takes the calculator out of PRGM mode
and turns off the annunciator. PRGM mode and programming are covered in
part II of
this handbook, so don’t be concerned about the
PRGM annunciator now.
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ALPHA (Alphabetic) Mode Annunciator
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When you place the HP-41C into ALPHA mode by pressing
ALPHA , the
ALPHA annunciator turns on. When the
ALPHA annunciator is turned on, you are
assured that the ALPHA keyboard is active. The ALPHA keyboard was covered in
section 1,
pages 18-20.
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The convenience of the HP-41C display annunciators allow you to concentrate on the
problem at hand—there is no need to remember the status of the calculator.
Just look at the display; you can immediately see all HP-41C operation conditions.
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