HP 39gs Master Manual page 221

The CHARS view
Generally most characters you will need are on the keyboard, but additional special characters can be
obtained through the
CHARS
there are many special characters available for use.
Once you have finished, and perhaps added some more formulas of your own, just press
again to return to the catalog level. You will find that your new Note is now listed. There is no need to save
your note because it is saved as you work. Just exit when finished.
Unfortunately this also means that there is no way to undo a mistake by
reverting to a previously saved version.
You may wish to try transferring your Note to a friend's calculator.
• If you own an hp 39gs then use the infra-red link. Press
"HP39 (IrDA)" on your machine. Press
• If you own an hp 40gs then plug the mini serial cable into both machines. Press
(Ser)" on your machine. Press
The astute reader may have notice the superscripted characters
second is the mathematical operator for squaring. The first is simply a textual character: trying to use it as a
mathematical operator will result in "Syntax error". The third is an oddity. If you choose the superscripted 3
then you will find that the character which actually appears is that of the inverse operator
available on the keyboard above the divide button. The reason for this odd transposition is based in the
history of the calculator. The original hp 38g only had the function INVERSE(...) and the
added for convenience sake in the hp 39g, released in 2000. To do this the creators had to borrow one of
the existing unused characters, the
change it in the
CHARS
Corrupting notes
An occasional problem users encounter is finding that the Notes they have saved onto a computer are
corrupted when they try to read them back. This is almost invariably caused by trying to open, read, print or
otherwise tamper with the Note while it is on the computer. If you view the file once it has been stored by
double clicking on it to try to open it then the computer may try to edit it with one of the word processors you
have installed. If you allow this and save the result then all sorts of characters may be inserted into the file
that will make it unreadable by the calculator. If you find that you have unintentionally opened a file in this
way then exit from the word processor without saving. More information on transferring to & editing on a PC
is given on pages 226 - 252.
view. The three pages of the
and "HP39/40 (Ser)" on your friend's machine.
3 character, and convert it into the
view and this error has never been fixed in any of the successive models!
view are shown below. As you can see,
CHARS
and
and "HP39 (IrDA)" on your friend's machine.
1 , 2 and 3 in the first screen above. The
-1 operator. However, they forgot to
221
SHIFT NOTEPAD
and "HP39/40
. This character is
-1
-1 operator was