HP HP-67

154 Program Editing
Press Display
R 006 31 54
123.00
L 007 35 2
123.00
You have seen how the key can be used in RUN mode to single-
step through a program. Using the key in this manner can help
you create and correct programs. Now let’s see how you can use E5id,
[BsT), and () ™ M (0 in W/PRGM mode to help you modify a
program.
Modifying a Program
Since you have completed execution of the above program, the HP-67
is set at step 008. You can verify that the calculator is set at this step
by sliding the Program Mode switch wipram [[[HllRuN to W/PRGM
and observing the step number and keycode in the display.
Now let’s modify this Pythagorean Theorem program so that the stack
contents will automatically be reviewed at certain points in the pro-
gram. We will do this by inserting the instruction £} at three
points in the program.
Press Display
B3 001 31 25 15
o 002 32 54 \ We will insert a B3
o 003 35 52] « \JEH instruction after
a 004 32 54 each of these
005 61 instructions.
006 31 54
D RN 007 35 22
To begin modification of the loaded program, again reset the
calculator to step 000 of program memory without erasing the
program: