Lexmark FORMS 249X Technical Reference page 111

Part Two: Specifying the Download Data
Attribute byte 1 specifies the character type and additional information.
Bit Bit Values
0
7 if the character is an
ascender (a character using
only the upper 8 wires of
the print head).
1
if the character is a
descender, a character
using only the lower 8
wires of the print head (for
example, g).
6-2 Not used; set to zeros.
0,0
1, 0 no expansion.
0,1
line-drawing character.
1,0
shading character.
1,1
not valid.
Functions
Ignored if bit 0 or bit 1 is set to 1.
Ignored if bit 0 or bit 1 is set to 1.
Normal ascender/descender character
based on bit 7.
The dots in row 8 are extended downward
through rows 9, 10, 11, and 12. Bit 7 is
ignored. Use this mode to create characters
similar to resident font characters 179 to
223.
The dots in rows 1, 2, 3, and 4 are repeated
as rows 9, 10, 11, and 12. NLQ mode is
ignored. Use this mode to create characters
similar to resident font characters 176 to
178.
Section 7: Downloading Characters and Fonts
111