Intermec 680X Reference Manual page 67

Operation
compressed graphics data command (ESC B) is received,
each dot line must be preceded by the "G" or "U," or an "A"
may be sent followed by the number of lines to advance.
When all data has been sent, the final bytes must be ESC E
to exit compressed graphics data.
Compressed graphics mode requires a graphic image the
same width as the print head in use: The 6806 has 576 bits
across a single line; the 6805a and 6804 have 384 bits; the
6804DM has 240 bits; and the 6808 has 832 bits across a
single line.
SO
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"
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"
SI Set Single Wide Print
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FF Form Feed
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LF Line Feed
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4-18 Intermec Portable Printers Technical Reference Manual
Set Double Wide Print
Format: SO
Dec: 14
Hex: OE
Function: Will print the current font in double width
until an SI is received (single wide printing) or a car-
riage return is received.
Format: SI
Dec: 15
Hex: OF
Function: Will print the current font in single width.
Format: FF
Hex: 0C
Dec: 12
Function: Will print the current line being formed,
then advance the paper to top of form.
Format: LF
SECTION 4