HP PCL/PJL reference - PCL 5 Comparison Guide

ENWW Printer-Specific Differences 2-99
• Row Number. Used only in modes 0 and 2 (8-bit modes)
when a 16-bit character set is selected. The row number
indicates the first byte while the LB or SM instruction will
supply the second byte.
For example, if you send LMO,37, and you have selected a
16-bit character set, sending LBAB<TERM> would result in the
device printing characters 65 and 66 from row 37 of the
character set grid.
If you are using an 8-bit character set in 16-bit mode (modes 1
or 3), you must specify the first byte of each character as 0. All
other first byte values are treated as undefined characters.
Notes:
• When LM switches modes, it turns off symbol mode (executes
SM;).
• LM affects the way SM and LB interpret bytes.
• LM does not affect the DT or DL commands.
• DT allows 8-bit terminator definitions only. To terminate a label
in 16-bit mode, precede the current label terminator by the null
character (decimal 0). The only exception is the
?E (Reset)
instruction in dual-context devices.
?E is executed regardless
of the byte boundaries within LB and SM.