Reference Guide

RPL Programming Examples 2-7
PRESERVE program listing
Program: Comments:
«
RCLF
Recalls the list of four 64-bit
binary integers representing the
status of the 128 system flags and
128 user flags.
→ f
Stores the list in local variable f.
«
Begins the defining procedure.
IFERR
Starts the error trap.
EVAL
Executes the program placed on
the stack as the level 1 argument.
THEN
f STOF ERRN DOERR
If the program caused an error,
restores flags, shows the error, and
aborts execution.
END
Ends the error routine.
f STOF
Puts the list back on the stack,
then restores the status of all flags.
»
Ends the defining procedure.
»
`O PRESERVE K
Stores the program in
PRESERVE.
Checksum: # 26834d
Bytes: 71
PRESERVE is demonstrated in the program BDISP.
BDISP (Binary Display)
BDISP displays a real or binary number in HEX, DEC, OCT, and BIN bases.
Level 1
→
Level 1
# n
→
# n
n
→
n