Lexmark 248X, 249X manual 117, Bit Functions, Printable Data

Attribute byte 2 is not used when specifying NLQ II. Set it to zero.

Bit	Functions
Printable Data	• Defines the column data for each character from left to right.
(Columns 1 to 23)	• Column 24 is always blank; therefore, only 23 columns can
	be defined.
	• There are 2 bytes per dot column, 46 bytes of printable data
	for each character.
	The two bytes of each dot-column are defined as follows:
	• The first byte defines dots in rows 1, 3, 5...15
	(3, 5, 7...17 for descender characters).
	• The second byte defines dots in rows 2, 4, 6...16
	(4, 6, 8...18 for descender characters).
	Consecutive horizontal dots are eliminated (except in
	emphasized mode). The number of consecutive horizontal
	dots should always be odd (for example 1, 3, 5, 7, 9) to
	ensure that a character appears the same when printed left-
	to-right or right-to-left.

Section 7: Downloading Characters and Fonts 117