Oneil microFlash2 Programming Reference Manual page 12

Esc B, ESC E Accept Compressed Graphics
Format ESC B
Dec 27 66
Hex 1B 42
Function Accepts compressed graphics. The printer decompresses and
prints the graphic.
Each compressed dotline (using a run-length encoding
scheme) is preceded by an uppercase G. Each uncompressed
dotline is preceded by an uppercase U. Vertical white space
(where several consecutive dotlines have not been printing) is
processed using an uppercase A followed by a single byte
count of the number of dotlines to advance.
Compressed dotlines use a single graphics byte, followed by
the number of times the byte is repeated. After the
compressed graphics data command (ESC B) is received,
each dotline 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 is 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 printhead in use.
Note: The microFlash3 printer has 576 bits across a single
line; the microFlash2/2t has 384 bits and the microFlash2i
has 240 bits microFlash4t has 832 bits across a single line.
SO Set Double Wide Print
Format SO
Dec 14
Hex OE
Function Prints the current font in double wide width until an SI (Set
Single Wide Print) command is received or a carriage return
is received.
SI Set Single Wide Print
Format SI
Dec 15
Hex OF
Function Prints the current font in single width.
Chapter 2: Using Line Printer Mode
ESC E
27 69
1B 45
O'Neil Programming Language Reference Manual
11