HP 49g+ - Manual (Page 771)

Page 26-6
• When a backup object is restored, the calculator performs an integrity
check on the restored object by calculating its CRC value. Any
discrepancy between the calculated and the stored CRC values result in
an error message indicating a corrupted data.
Using data in backup objects
Although you cannot directly modify the contents of backup objects, you can
use those contents in calculator operations. For example, you can run
programs stored as backup objects or use data from backup objects to run
programs. To run backup-object programs or use data from backup objects
you can use the File Manager (
„¡) to copy backup object contents to
the screen. Alternatively, you can use function EVAL to run a program stored
in a backup object, or function RCL to recover data from a backup object as
follows:
• In algebraic mode:
To evaluate a back up object, enter:
EVAL(argument(s), : Port_Number : Backup_Name )
To recall a backup object to the command line, enter:
RCL(: Port_Number : Backup_Name)
• In RPN mode:
To evaluate a back up object, enter:
Argument(s) ` : Port_Number : Backup_Name EVAL
To recall a backup object to the command line, enter:
: Port_Number : Backup_Name ` RCL
Using SD cards
The calculator provides a memory card port where you can insert an SD flash
card for backing up calculator objects, or for downloading objects from other
sources. Insert the card with the label side down. The SD card in the
calculator will appear as port number 3.
Accessing an object from the SD card is performed similarly as if the object
were located in ports 0, 1, or 2. However, Port 3 will not appear in the menu
when using the LIB function (
‚á). The SD files can only be managed
using the Filer, or File Manager ( „¡). When starting the Filer, the Tree
view will show: