HP HP-67 User Manual

Simple Programming 131
Default Functions
The default functions, DZSERFEEIIXIERFY, that are found above
the [§ through [3 keys on the keyboard have been placed in the
calculator to enhance its usability in manual calculations. As soon as
you load even a single operation into program memory, whether from
the keyboard or from a magnetic card, the default functions are lost,
and the top row keys, I through 3, are used in programming. Since
the five default functions are also duplicated on the keyboard as
prefixed functions, you can still utilize those operations in a program.
Note: In actuality, if you press one of the top row keys in
W/PRGM mode when no operations have been loaded into
program memory, the prefixed function associated with
that default function is loaded. After that, however, since an
operation has been loaded into program memory, the de-
fault functions are lost. In this handbook, we have always
used prefixed functions when programming, and we urge
that you do the same, reserving the default functions for
manual operation.
Default functions are restored when the calculator is turned OFF then
ON, or when program memory is cleared using £ CLPRGM).
Problems
1. What would be the keycodes for the following operations: ,
0 (Gro), [ (Hms+], 1?
2. What operations are identified by the following keycodes: 41,
31 63, 35 62, 33 51 00?
3. How many steps of program memory would be required to load
the following sections of programs?
a. 2 3
b. 10 6 682
c.
100688
25060
@
2068
208
4.
What
keystroke(s)
would
you
load
into
a
program
to
perform
an
X excflmnge y? (That is, to exchange the contents of the
X-register with those of the Y-register.)

HP HP-67 Specifications

General

Brand	HP
Model	HP-67
Category	Calculator
Language	English