HP 48g Graphing Calculator - Manual (Page 394)

CSUtiOn Executing RESTORE overwrites the entire contents
of user memory with the contents of the backup
object. To save the stack, you can save it in another
backup object.
To
restore
HP 48 user memory from a backup object:
1. Enter the backup object’s identifier (with ¡1 « delimiters) onto the
stack. (Remember the name includes a port number.)
2
. Press
(5)( memory ) fNXT) RES
T0.
3. Optional: To restore flag settings previously saved, recall the
contents of the variable containing the flag data and press
i^fMODES) F L A G (NXT) S T O P .
28
Using Libraries
A library is an object that contains named objects that can act
as extensions to the built-in command set. The primary use of a
library is to serve as a vehicle for a ROM- or RAM-based application.
A ROM-based library resides in a plug-in application card and is
installed by inserting the card into one of the card slots. (The HP 48G
has no plug-in card slots.) A RAM-based library can reside in a
plug-in RAM card, or it can be transferred into user memory from
the infrared or serial I/O port. (See the library’s documentation for
details).
Caution
Libraries originally designed for use with the older
HP 48S and HP 48SX models may not be compatible
with the HP 48G and HP 48GX. Loss of memory
may occur. You should backup your user memory
(see page 28-5) before attempting to use such
libraries. Contact the vendor or author of the library
for more details about compatibility.
Libraries offer several advantages over programs:
■ Applications you write are protected from copying because the
contents of a library can’t be viewed, edited, or recalled to the stack.
28-6 Libraries, Ports and Plug-In Cards