The HP38G, HP39G & HP40G all use the same software to communicate between
the calculator and a PC. This page assumes that you already have a cable (see
the Hardware page) and that you have downloaded and installed the programs HPGComm and
the ADK, either the HP38G version or the HP39G/HP40G version (see Software). If
not then go back to the Help page and take care of that first.
The information which follows is organized as shown below. New users should
start with the first topic and follow the links on each page to the next one.
Before storing information from your HP to your PC for the first time here is
some information you will find helpful.
object which is contained in a view which has a SEND or RECV key
can be transmitted using the HPGComm program. This includes the Aplet
Library view, and the List, Matrix and Note Catalogs
and means that you can store or retrieve aplets, programs, lists, matrices
and Notes. Sketches can only be transferred by sending or receiving
the aplet which contains them. The SEND key will only be present if
the view is not empty but the RECV key will always be there.
|The HPGComm program will remember the last six locations from which, or to
which, you transferred objects. These can be retrieved from the pull
down list on the main screen. |
|If you download an aplet or program from the web then it will probably
consist of a set of files compressed into a ZIP file. You
must be sure to expand the ZIP file into an empty directory so
that there is no chance of overwriting the special files of another set of
objects with those belonging to the new aplet or program. |
|The filenames used on the PC will not be the same as the name which
appears on the calculator. For example, a Note called "Phys.
2/a" would appear on the PC as PHYS2A00.000. Names can have a maximum
of 8 characters with no spaces or punctuation. |
|Each directory used to store calculator objects (aplets, Notes etc) will
also contain two special files. For an HP38G these will be called
HP38DIR.000 and HP38DIR.CUR. If you are using an HP39G or HP40G then
the names will vary accordingly.|
DO NOT edit, alter or
delete these two special files.
If you damage them in any way then the information in the directory
will no longer be accessible to the calculator.
the calculator first stores objects to a directory it creates these two
special files and you will see the message shown right. Press 'YES
'. This message should only occur the first time you use a directory.
If it appears again when working with a directory you have already
initialized then the the two special files have probably been corrupted.