The stack, The stack -3 – HP 48g Graphing Calculator User Manual
Page 17
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Annunciators (continued)
Symbol
Meaning
FiflD
Radians angle mode is active.
nPHD
Cra.ds angle mode is active.
R.iZ
Polar/CylindricaJ coordinates mode is active.
Polar/Spherical coordinates mode is active.
HFlLT
Program execution has been halted.
1 2 3 4 5
The indicated user flags are set.
1 Li SR
The user keyboard
is active for one operation.
USER
The user keyboard is active until you press fi^fUSER).
FiLG
Algebraic-entry mode is active.
PRG
Program-entr).' mode is active.
The Stack
The stack
is
a series of
memory storage
locations for numbers and
other
objects.
The locations are called
levels
1,
2, 3,
etc. The number
of levels
changes
according to how many
objects
are stored
on the
stack—from none to hundreds.
As
you
enter
new
numbers or other objects on the stack, the stack
grows to accommodate them: the new data moves into level 1, and
older data is '‘bumpecr to higher levels. As you use data from the
stack, the number of levels decreases as the data, moves down to lower
levels.
The stack display shows level 1 and up to three additional levels.
Any additional levels are maintained in memory, but normally aren’t
displayed.
For more information about the stack and command line, see “Using
the Stack for Calculations’’ on page 3-1.
The Keyboard and Display 1-3