HP HP-16C - Section 7: Programming Basics; Program Memory; Program Instructions and Keycodes

Section 7: Programming Basics 75
Running a Program
Run Mode. Switch back to Run mode (no PRGM annunciator
displayed) when you are done programming by pressing [9][P/R].
Program execution can take place only in Run mode.
Keystrokes Display
(9](P/R] Run mode; no PRGM
annunciator displayed.
Display will show
previous result.
The position in program memory does not change when the
calculator transfers between Run mode and Program mode.
Whenever the calculator has been off, it “wakes up” in Run mode.
Executing a Program. In Run mode, press label. This
addresses a particular program and starts its execution. The
display will flash running. (The key is the same one used—
under different circumstances—to ‘“‘go to subroutine”.)
Keystrokes Display ([STATUS]: 2-16-0000)
(HEX]FFFE FFFE h Enter the first number
into the X-and Y-
registers.
DDDC dddC h Key the second number
into the X-register. These
digits will become the
most significant ones.
(GSB]A dddCFFFE h The concatenated hex
number.
2-32-0000 The word size is now 32.
Alternatively, you can position the calculator to a particular line
using (-] nnn (three-digit line number) or label and then
start execution by pressing [R/S].
Intermediate Program Stops
Use [9])(PSE] (pause) as a program instruction to momentarily stop a
program and display an intermediate result. Use ore than one
for a longer pause.