Brother HL-7050 Series User Manual page 249

Code 128 sets A, B and C can be individually selected. Set A
indicates characters Hex 00 to 5F. Set B includes characters Hex 20
to 7F. Set C includes the pairs 00 to 99. Switching is allowed
between the code sets by sending %A, %B, or %C. FNC 1, 2, 3, and
4 are produced with %1, %2, %3, and %4. The SHIFT code, %S,
allows temporary switching (for one character only) from set A to set
B and vice versa. The '%' character can be encoded by sending it
twice.
When ISBN (EAN) is selected with the parameter 't130' or 'T130'
The same rules apply as for 't5' or 'T5'.
When ISBN (UPC-E) is selected with the parameter 't131' or
'T131':
The same rules apply as for 't6' or 'T6'.
When EAN 128 set A, set B or set C is selected with the parameter
't132' or 'T132', 't133' or 'T133' or 't134' or 'T134'
The same rules apply as for 't12' or 'T12', 't13' or 'T13', or 't14' or
'T14'.
Box drawing
ESC i ... E (or e)
'E' or 'e' is a terminator.
Line block drawing
ESC i ... V (or v)
'V' or 'v' is a terminator.
Expanded character data start
n = 'l' or 'L'
Data that follows 'l' or 'L' is read as expanded character data (or
labeling data). Expanded character data must end with the ' \ ' code
(5CH), which also ends this command.
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