User's Manual

74 Section 6: Programming Basics
Keystrokes
Display
4
4
Enter h of third can.
¦
254.4690
VOLUME of third can.
240.3318
SURFACE AREA of third can.
l 1
133.5177
Sum of BASE AREAS.
l 2
939.3362
Sum of VOLUMES.
l 3
769.6902
Sum of SURFACE AREAS.
The preceding program illustrates the basic techniques of programming. It
also shows how data can be manipulated in Program and Run modes by
entering, storing, and recalling data (input and output) using v,
O, l, storage register arithmetic, and programmed stops.
Further Information
Program Instructions
Each digit, decimal point, and function key is considered an instruction
and is stored in one line of program memory. An instruction may include
prefixes (such as ´, O, t and b) and still occupy only one
line. Most instructions require one byte of program memory; however, some
require two. For a complete list of two-byte instructions, refer to
Appendix C.
Instruction Coding
Each key on the HP-15C keyboard  except for the digit keys 0 through
9  is identified in Program mode by a two-  
corresponds to the key's position on the keyboard.
Instruction
Code
O + 1
006-44,40, 1
Sixth program line.
´ e V
XXX-42, 5,25
e 
The first digit of a keycode refers to the row (1 to 4 from top to bottom),
and the second digit refers to the column (1, 2, 9, 0 from left to right).
Exception: the keycode for a digit key is simply that digit.