Managing Calculator Memory - HP -18C Owner's Manual

If the calculator fails to respond to keystrokes and you are unable to
restore operation by performing a reset operation or by changing the
batteries, erasing Continuous Memory may restore calculator function.
Continuous Memory may inadvertently be erased if the calculator is
dropped or if power is interrupted.
Managing Calculator Memory
The HP-18C has approximately 1,200 units (or Hbytes H ) of calculator
memory available for your use . Table C-l describes the amount of
memory used by the various types of information you can store. Built-
in variables and built-in formulas are not listed; space is allocated to
them elsewhere in calculator memory.
The message I
NSUFF
I
C lENT Mnl0R .....
informs you that you are at-
tempting to do an operation that uses more calculator memory than is
currently available. Many operations require calculator memory-for
example, entering alpha mode, switching to certain menus, storing
numbers and formulas, naming lists, and creating custom menus.
Here are some suggestions for dealing with this situation:
1. Whenever the message is displayed, you should complete any
arithmetic calculations you were in the process of doing in the
calculator line (press
0
or
. 1
CLEAR
I).
This frees the memory
that was being used to store each of the numbers and operators.
2. If, after completing arithmetic calculations, there is still insuffi-
cient memory, you must further reduce the amount of occupied
memory. There are a number of ways to do this:
• If you've named any
SUM
or
CFLO
lists, you can rename them
to shorter names (refer to page 111). Or, you can clear any
SUM
or
CFLO
lists you no longer need (refer to page 114). Dis-
playing the GET menu requires memory, and you may find
that, upon pressing . . ' only one menu label is displayed.
If this label is not the list you want, you can display another
label by switching to the list displayed in the GET menu and
then pressing . . again.
C: Caring for and Using Your Calculator 189