Interrupting Program Execution - HP 25 Owner's Handbook Manual

82
Programming
Displaying a Particular Step
If you want to see one of the later steps of your program,. is
not convenient. To display a particul ar step of program memory
use the mm key with the PRGM-RUN switch set to RUN
P R G M " RUN .
Simply press mm and then key in the desired two-
digit step number. Then set the PRGM-RUN switch to PRGM
PRGM~RUN
and the contents of the specified step will be
displayed.
For example , to see step lOin the previous program, set the
PRGM-RUN switch to RUN
P R G M " RUN
and press mm
[]] @].
Then switch back to PRGM mode
PRGM~RUN.
The display
will show:
I
10 06
When using the mmkey in this way , always use two digits for
designating step numbers. For instance , to see step 6 you must
press mm
@]
~
in RUN mode and then switch back to PRGM
mode .
If the first digit key following mmis greater than four , themIil
key is ignored and the number is keyed into the X-register.
Similarly, if one of the two keys followingmm is not a digit key ,
the mmkey is ignored and the operation associated with the
invalid key is performed .
Interrupting Program Execution
From time to time you will want a program to stop execution
by it self so that you can enter new data or view an intermediate
result. There are two operations on your H P-25 calculator that
will automatically interrupt progra m e xecution when they a re
encountered as program in struction s:
~
and
D 1
PAUSE
I.