HP HP-65 - Editing Operations

Editing Operations
You edit with the mode switch set to W/PRGM. The edit op-
erations make it easier to key in programs because, in case of
mistakes, you can correct a wrong step by (1) stepping through
your program using until the wrong step is in the display,
(2) pressing [8] (delete program step) and by reentering
the step correctly.
To insert an operation following the one on display, just key it
in. Now you will be able to step through your program and in-
sert a step between any two steps.
Revising a Program
Sample Case. To demonstrate the editing process, let us revise
the default f§ function to calculate the factorial function in-
stead of the reciprocal function. The desired function will be
A E [ , which is identical to what is already in
memory except for the fourth key. We need only delete the
and insert [n]].
Editing Procedure: Before we can delete /x |, we must move the
pointer to (code 04). Conceivably we could repeatedly press
in W/PRGM mode. This would advance the pointer to
the bottom of memory, through the top, and to the first loca-
tion, etc. in circular fashion.
Bottom 100
Top
advances
the
pointer downward
in this direction.
Pointer— 3