IBM 4840-563 System Reference Manual page 59

Display position (10) <DLE>
Normal display control mode (11) <DC1>
Purpose:
Vertical scroll display control mode (12) <DC2>
Purpose:
Cursor on (13) <DC3>
Purpose:
Cursor off (14) <DC4>
Purpose:
Reset (1F) <US>
Purpose:
SurePOS 500 Model XX3 Technical Reference, v 1.3
10 nn
Purpose:
11
Sets normal display control mode (DC1) and permits data to be written to
either line. After writing a character, the cursor moves one position to the right.
When the display position is at the last position of the top line, the cursor
moves to the first position of the bottom line. When the display position is at
the last position of the bottom line, the cursor moves to the first position of the
top line. The display remains in DC1 mode until a DC2 mode command is
issued, a reset command is issued, or power is removed from the display.
12
Sets vertical scroll display control mode (DC2) and permits data to be written
to either line. When the display position is at the last position of the top line,
the cursor moves to the first position of the bottom line. When either valid
character data, a Horizontal Tab command, or a Line Feed command is sent
to the last position of the bottom line, the data on the bottom line is transferred
to the top line and the cursor is moved to the lower left position. Note that a
Carriage Return command does not cause the data on the bottom line to be
transferred to the top line. This is the power-on and Reset command default
setting. The display remains in DC2 mode until a DC1 mode command is
issued.
13
Turns on the cursor. This is the power-on default setting.
14
Turns off the cursor.
1F
81
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