Controlling The Information On The Display Screen - IBM 5110 User Manual

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The 5110 remains in lowercase character mode until:
• The system power is turned off.
• The RESTART switch is pressed.
• One of the following procedures is used to change the keyboard
entry mode to standard APL characters:
-- Perform the keying sequence:
.
,
1. Press the
II
key .
2.
Hold down t h e . (shift) key and press the
(scroll
up) key.
Enter the statement:
~5
nee
0
:L
L
Specifies standard APL character mode
CONTROLLING THE INFORMATION ON THE DISPLAY SCREEN
You can control the information and the position. of the information on
the display screen by using:
• The scroll up
II
and scroll down
II
keys
• The
Dee
(console control) system function to turn display on or off
• The
Dee
system function to scroll the information on the display
screen up or down
• A pair of shared variables
You are already familiar with using the scroll up and scroll down keys
to position the information on the display screen. How to use a pair of
shared variables to read and write data at any position on the display
screen is discussed in detail under
Input/Output Control.
How to use
the
Dee
system function to control information on the display is
discussed in this section.