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Chapter 8. PPL3 Plus Emulation GEK-00029B
202
HTS Horizontal Tab Set (88H):
HTS sets a horizontal tab stop at the
active horizontal position. No change occurs if the active horizontal
position is in the tab table. If the table is full, the highest tab stop is
lost. When the new tab would be the highest and the table is already
full, the new tab is lost.
IND Index (84H):
IND moves the active vertical position down one Vertical
Advance Increment. It behaves the same as Line Feed. See the
section later in the chapter on the Page Coordinate System.
NEL Next Line (85H):
NEL sets the active horizontal position to the Line
Home Position and moves the active vertical position down one
Vertical Advance Increment. See Page Coordinate System later in the
chapter.
PLD Partial Line Down (8BH):
PLD moved the active vertical position
downward by the Subscript Vertical Distance. This is discussed
further in the section on Page Coordinate System later in the chapter.
PLU Partial Line Up (8CH):
PLU moves the active vertical position upward
by the Superscript Vertical Distance. This is discussed further in the
section on Page Coordinate System later in the chapter.
RI Reverse Index (8DH):
RI moves the active vertical position up one
Vertical Advance Increment (VAI). The maximum allowable movement
is to the top margin. This is discussed further in the section on Page
Coordinate System later in the chapter.
SS2 Single Shift 2 (8EH):
SS2 temporarily maps character set G2 into GL
to print one character.
SS3 Single Shift 3 (8FH):
SS3 temporarily maps character set G3 into GL
to print one character.
ST String Terminator (9CH):
ST indicates the end of a control string.
VTS Vertical Tab Set (8AH):
VTS sets a vertical tab stop. If the First
Character Flag is set, the tab stop is set at the active vertical
position. If the First Character Flag is not set, VTS sets the active
vertical position minus the Above Baseline Offset. No change occurs if
that position is already a vertical tab stop.
If the vertical tab table is full and the new tab position is less than
the highest entry in the table, the new tab stop is inserted and the
highest entry is lost. If the new tab stop would be the highest, then
the new tab stop is lost.
RESERVED
The hex values 80H to 83H and 98H through 9AH are reserved for
future use. If encountered they abort any escape sequence, control
sequence, or control string in progress. They are ignored otherwise.