HP 5961-0509 manual 255 to 0-32767. This expansion allows for additional styles

Notes	With the introduction of the HP LaserJet IID printer, Hewlett-Packard
	expanded the style values (in the Font Header style value field) from a
	one-byte to a two-byte value field, expanding the style range from
	0-255 to 0-32767. This expansion allows for additional styles.
	Style values can be obtained by calculating the “Style Word” as
	described under “Style MSB” in Chapter 11.
	For selecting style, an exact match is required. If there is no match,
	this characteristic is ignored, but stored in the font select table,
	available for the next selection.

Example

To specify an upright style for the primary font, send:

EC(s0S

To specify an italic style for the secondary font, send:

EC)s1S

Figure 8-1 Common Font Styles

EN Style Command 8-15