HP 48g Graphing Calculator - Manual (Page 427)

There are no guarantees that such programs will run without errors on
the HP 48G Series calculators. However, most older programs that use
only User-RPL commands—the set of commands that are recognized
when you type in their names on the keyboard—will work on the
newer HP 48G Series.
There are some differences between the older HP 48S Series and the
newer HP 48G Series that may (or may not) affect older programs;
■ HP 48S Series programs using the SYSEVAL command may cause
memory loss when run on a HP 48G Series calculator due to
changes in the internal memory mapping.
■ HP 48S Series programs that use variable names that are identical
to commands newly introduced on the HP 48G Series calculators
will give unpredictable results due to the name conflict. Changing
the names used in the older program will prevent this problem.
■ HP 48S Series programs that use the MENU command to display
a builUin menu may give unexpected results because the HP 48G
Series calculators uses a different menu structure (see Appendix C).
■ HP 48S Series programs that use flags -14, -28, -29, or -54 will
conflict with the built-in meanings for these flags in the HP 48G
Series calculators.
Some commercially-distributed libraries developed for the HP 48S
Series may not work on the HP 48G Series and may, in fact, cause
memory loss. In addition, some libraries on plug-in cards may only
work when the card is stored in Card Slot 1; others may only work
when the card is stored in Card Slot 2. Be sure to backup user
memory before experimenting with an untested library.
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Where to Find More Information
■ The HP 48G Senes Advanced User’s Reference (part number
00048-90136) contains programming information, including syntax
information for all HP 48G Series commands, in a reference format.
■ The HP Calculator Bulletin Board System (see inside back cover)
provides a forum for exchange of information about the availability
and compatibility of software developed for either Series S or Series
G calculators. It is also a good source of programming tips and
interesting programs.
Programming the HP 48 29-21