Clearing one or more programs, The checksum – HP 35s Scientific Calculator User Manual
Page 205
13-23
where 67 is the number of bytes used by the program.
Clearing One or More Programs
To clear a specific program from memory
1. Press
(2)
and display (using
Ø
and
×
) the
label of the program.
2. Press
.
3. Press
to cancel the catalog or
to back out.
To clear all programs from memory:
1. Press
to display program lines (PRGM annunciator on).
2. Press
() to clear program memory.
3. The message prompts you for confirmation. Press
Ö
()
.
4. Press
to cancel program entry.
Clearing all of memory (
()) also clears all programs.
The Checksum
The checksum is a unique hexadecimal value given to each program label and its
associated lines (until the next label). This number is useful for comparison with a
known checksum for an existing program that you have keyed into program
memory. If the known checksum and the one shown by your calculator are the
same, then you have correctly entered all the lines of the program. To see your
checksum:
1. Press
()
for the catalog of program labels.
2. Display the appropriate label by using the cursor keys, if necessary.
3. Press and hold
to display checksum and length.