HP HP-15C User Manual

Section 6: Programming Basics 75
Keycode 25: second row, fifth key.
Memory Configuration
Understanding memory configuration is not essential to your use of the
HP-15C. It is essential, however, for obtaining maximum efficiency in
memory and programming use. The more you program, the more useful this
knowledge will be. Memory configuration and allocation is thoroughly
explained in appendix C, Memory Allocation.
Should you ever get an Error 10, you have run up against limitations of the
HP-15C memory. If you learn how to reallocate memory, you can greatly
increase your ability to store information in the HP-15C.
The HP-15C memory consists of 67 registers (R
0
to R
65
and the Index
register) divided between data storage and programming/advanced function
capability. The initial configuration is:
 46 registers for both programming and the advanced functions
(_, f, the imaginary stack, and > functions). At seven
bytes of memory per register, this is worth 322 program bytes if no
memory is dedicated to advanced functions.
 21 registers for data storage (R
0
to R
9
, R
.0
to R
.9
, and the Index
register).

HP HP-15C Specifications

General

Brand	HP
Model	HP-15C
Category	Calculator
Language	English