Hold; Execute; Command; Positioning The Cursor And Information On The Display Screen - IBM 5100 Apl Reference Manual

6
Hold
•
When pressed once, HOLD causes all processing to stop; when pressed again, it
allows processing to resume. The primary purpose of HOLD is to permit reading
the display information during an output operation, when the display is changing
rapidly. When the hold is in effect (HOLD pressed once), only the COpy DISPLAY
key is active.
Notes:
1. Holding down the CMD key and pressing HOLD is restricted to use by the
service personnel.
2. When the hold is in effect (HOLD pressed once), the use of the arithmetic
keys (+ - -;- x) on the right side of the keyboard are restricted to use by
service personnel.
Execute
When this key is pressed, the input line of information on the display screen is
processed by the system. This key must be pressed for any input to be processed.
Command
When this key is pressed and held, pressing an alphameric key in the top row
causes the APL command keyword or character above that key to be entered.
in the input line. The command keywords are: ) LOAD, )SAVE, )CONT,
)LlB,~
)FNS, )VARS, )COPY, )WSID, )OUTSEL, and )REWIND.
Note:
Holding down the CMD key and pressing HOLD is restricted to use by the
service personnel.
Positioning the Cursor and Information on the Display Screen
The following keys are used to position the cursor and information on the display
screen:
Forward Space
•
When this key is pressed once, the cursor moves one position to the right. When
this key
is
held down, the cursor continues to move to the right. When the cursor
reaches the last position on one input line (line 1 or 0), it wraps around to the
first position on the other input line.