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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:
Θ 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)
Θ 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 has a memory card port into which you can insert an SD flash
card for backing up calculator objects, or for downloading objects from other
sources. The SD card in the calculator will appear as port number 3.
Inserting and removing an SD card
The SD slot is located on the bottom edge of the calculator, just below the
number keys. SD cards must be inserted facing down. Most cards have a label
on what would usually be considered the top of the card. If you are holding the
HP 50g with the keyboard facing up, then this side of the SD card should face
down or away from you when being inserted into the HP 50g. The card will
go into the slot without resistance for most of its length and then it will require
slightly more force to fully insert it. A fully inserted card is almost flush with the
case, leaving only the top edge of the card visible.