Trace Mode - HP 48gII Advanced User's Reference Manual

Trace Mode

This section contains two programs, ENTER and ßENTER, which together provide "trace mode" for the
hp49g+/hp48gII using an external printer. To turn on "trace mode," set flag – 63 and activate User mode. To
turn off "trace mode," clear flag
Techniques used in ENTER and ßENTER
Vectored ENTER. Setting flag
!
ENTER is turned on and variable ENTER exists, the command-line text is put on the stack as a string and
ENTER is evaluated. Then, if variable ßENTER exists, the command that triggered the command-line
processing is put on the stack as a string and ßENTER is evaluated.
ENTER program listing
Program:
«
PR1
OBJ
»
`O ENTER K
Checksum: # 127d
Bytes: 25.5
ßENTER program listing
Program:
«
PR1 DROP
PRSTC
»
`O ßENTER K
Checksum: # 31902d
Bytes: 28
–
63 or turn off User mode.
–
63 and activating User mode turns on vectored ENTER. When vectored
Comments:
Prints the command line text, then
converts the string to an object and
evaluates it.
Stores the program in ENTER.
(Press ~‚A to type . You
must use this name.)
Comments:
Prints the command that caused the
processing, then drops it and prints
the stack in compact form.
Stores the program in ßENTER.
(Press ~‚B to type ß. You
must use this name.)
RPL Programming Examples 2-37