|
|
Section 8: Program Editing 132
|
|
|
|
Single-Line Viewing Without Execution
|
|
|
|
You can use
SST (single step) and
BST (back step) in PRGM mode to
single-step to the desired line of program memory without
executing the program. Each press of
SST steps forward one line in the program,
and each press of BST steps back one line
in the program.
|
|
|
|
Both
SST and
BST operate only within the current
program. Pressing SST when the calculator
is set to the end of a program positions the calculator back to the
beginning of that program. In a similar way, pressing
BST when the calculator is set to the top
of a program positions the calculator around to the end of
that program.
|
|
|
|
|
|
|
|
|
Pressing SST when the calculator
is positioned here, moves the calculator back to the beginning of this
program.
|
|
|
|
|
|
|
|
|
|
|
|
Pressing BST when the calculator
is positioned at the top of the program moves the calculator
to the end of this program.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Lines in a program with names longer than the display are
‘‘scrolled’’ through the display to
the left. SST and
BST can be used to view all program lines
repeatedly, even long instruction names that are scrolled.
|
|
|
|
Remember, in normal and USER modes, SST is
used to execute programs one line at a time, and in PRGM mode,
SST is used to view programs without
execution. However, BST is used for
viewing only and does not execute in PRGM, normal, or USER
modes.
|
|
|
|
|
|
|
|
Now, use SST to move the calculator down to
line 7 so that you can insert the PSE (pause)
instruction.
|
