HP 5961-0509 manual Define Symbol Set, Data format for the user-defined symbol set is shown

Define Symbol Set

This command defines the characters and character mapping for a user-defined symbol set.

EC ( f # W [symbol set definition data]

#= Number of bytes in symbol set definition

Default = n/a

Range = 0 - 32767

If a user-defined symbol set is already present in the printer and a new, valid symbol set is downloaded with the same Symbol Set ID Code, then the old symbol set is deleted. If an internal symbol set with the same ID code exists, it is overridden by the new symbol set. If the symbol set definition is invalid, the command is ignored. If there is insufficient memory to create the symbol set, the symbol set is discarded.

Note	Send the Symbol Set ID Code command prior to the Define Symbol
	Set command to assign an ID code for the user-defined symbol set. If
	the Symbol Set ID Code command is not sent, the last code sent is
	used. If none have been sent, then the default (0) is assigned.
	The data format for the user-defined symbol set is shown in
	Table 10-1.
	Table 10-1 User-Defined Symbol Set Defintion Format
	Byte	15 - MSB8	7LSB - 0
	0	Header Size (18)
	2	Encoded Symbol Set
		Designator
	4	Format	Symbol Set Type
	6	First Code
	8	Last Code
	10	Character Requirements
	Hdr	Symbol Map [Last Code — First Code + 1]
	Size	￿

10-4User-Defined Symbol Sets EN