HP HP-20S - Positioning the Program Pointer

Example: This example clears the pipe area program and enters a
new version of the program that includes a label and a return instruc-
tion. (Refer to page 71 if you don’t want to clear all of program
memory.) If you make a mistake during entry, press [¢] to delete the
current program line, then reenter it correctly.
Keys: Display: Description:
Enters Program mode
&Y
(PRGM annunciator
on).
(] 00- Clears program
memory.
] A 01- 61 41 A Labels this program
routine “A”.
(=) (2] 02- 51 11 Enters the program
03- 55 lines.
fd 04- 61 22
) 05- 45
4 06- 4
=) 07- 74
08- 61 26 Ends the program.
prog
CFO08 Checksum (page 66).
pag
Exits Program mode
&
(PRGM annunciator
off).
Positioning the Program Pointer
Program memory starts at line 00. The list of program lines is circular,
so you can wrap the program pointer from the bottom to the top.
There are several ways to move the program pointer to view different
lines:
68 6: Programming