HP HP-67 - Page 139

Simple Programming 135
Since we do not have a magnetic card that contains the program we
have written to solve for the area of a circle, we will use this second
method to load our program.
To load a program from the keyboard, simply slide the W/PRGM-
RUN switch weram [[[[Hllrun to W/PRGM (program). When the
W/PRGM-RUN switch is in the W/PRGM position, the functions and
operations that are normally executed when you press the keys are not
executed. Instead, they are stored in program memory for later execu-
tion. All operations on the keyboard except five can be loaded into
program memory for later execution. The five operations that cannot
be loaded in as part of a program are:
0 ), @ est, 52, @ oed, B0 O @ @ @
These five operations are used to help you load, edit, and modify your
programs in the calculator.
Note: Naturally, the five default keys cannot be loaded into
program memory, either. However, these keys are dupli-
cated by prefixed keys that can be loaded. Thus, although
you cannot load [E&} . you can load the operation,
etc.
All other functions when pressed with the W/PRGM-RUN switch
wrRaM [T RuN in W/PRGM mode are loaded into the calculator as
program instructions to be executed later.
So if you have not already done so:
1. Slide the W/PRGM-RUN switch werrem[[[Jlllrun to
W/PRGM.
2. Press [ to clear program memory of any previous
programs and to reset the calculator to the top of program
memory.