Lexmark 249X, 248X manual 116, Part Two Specifying the Download Data

Part Two: Specifying the Download Data

Each font character is made up of 48 bytes of data. There are 2 bytes of attribute data and 46 bytes of character data. This field of 48 bytes must be repeated for each character. The following text describes the specifications of the attribute bytes and the character data.

Attribute byte 1 specifies the character type.

Bit	Bit Values	Functions
7	0 if the character is an	Ignored if bit 0 or bit 1 is set to 1.
	ascender.
	1 if the character is a	Ignored if bit 0 or bit 1 is set to 1.
	descender
	(for example, ’g’).
6-2	Currently ignored and
	should always be zero.
1,0	0,0 no 12-high expansion.
	Bit 7 is valid.
	0,1 line-drawing character.	This type mode should be used to create
	Expand the bottom row 15	characters similar to resident font
	down to rows 17, 19, 21,	characters 179 to 223.
	and 23. Expand the bottom
	row 16 down to rows 18,
	20, 22, and 24. The
	ascender/descender bit 7
	above is ignored.
	1,0 shading character.	This type mode should be used to create
	Expand the top dots in	characters similar to resident font
	rows 1, 3, 5, and 7 down to	characters 176 to 178.
	rows 17, 19, 21, and 23.
	Expand the top dots in
	rows 2, 4, 6, and 8 down to
	rows 18, 20, 22, and 24. The
	ascender/descender bit 7
	above is ignored.

116 Section 7: Downloading Characters and Fonts