HP·38E/38C - Slide Rule Museum

Appendix D
Continuous Memory
(HP-38C only)
When you turn off your calculator, the following information is retained:
• Contents of the financial registers and the storage registers.
• All programs that are loaded into the calculator.
Numbers in the stack and LAST X register are not preserved when you
turn off the calculator. Regardless of where you stopped in a program,
the calculator returns to line 00 (top of program memory) when you turn
it on again .
Executing the self-check does not clear program memory, storage
registers, or financial registers.
Continuous Memory requires that the batteries be kept in the calculator.
If the low power indicator appears in the display, turn your calculator
off immediately and connect it to an ac outlet or insert a new battery
pack. Continuous Memory requires that batteries be replaced as quickly
as possible. Normally you have a minimum of 5 seconds to change the
batteries . Leaving the batteries out of the calculator fo r extended periods,
or allowing the batteries to discharge completely will result in loss of
the info rmation in Continuous Memory.
If you drop or traumatize your calculator, or if power to the Continuous
Memory is interrupted whether the calculator is off or on, the contents
of program memory and the data storage registers may be lost. If this
occurs, when the calculator is then turned on, the display will show
Pr Error. To restore the display, ensure that the battery is charged, or
connect the ac adapter/recharger, and press any key.
CAUTION
Switching off the HP-38C during execution of either a program
or a function may clear or alter instructions in program
memory and data in the financial or storage registers.
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