Clearing One Or More Programs; The Checksum - HP 33s Owner's Manual

The catalog shows you how many bytes of memory each labeled program
segment uses. The programs are identified by program label:
 

where 67 is the number of bytes used by the program.

Clearing One or More Programs

To clear a specific program from memory
¹ u
1. Press
program.
¹ ¡
2. Press
Å
3. Press
To clear all programs from memory:
¹ £
1. Press
¹ ¡
2. Press
3. The message     prompts you for confirmation. Press {  }.
¹ £
4. Press
Clearing all of memory (

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 u
1. Press
2. Display the appropriate label by using the cursor keys, if necessary.
3. Press and hold
For example, to see the checksum for the current program (the "cylinder"
program):
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
{  } and display (using
.
to cancel the catalog or
to display program lines (PRGM annunciator on).
{  } to clear program memory.
to cancel program entry.
¹ ¡
{  } for the catalog of program labels.
º Î
to display  checksum and  length.
Size : 13.7 x 21.2 cm
Ø ×
and
~
to back out.
{  }) also clears all programs.
Simple Programming
Page : 386
) the label of the
12–21