Intermec EasyCoder 3440 User Manual page 15

Once you have compressed the graphic, you need to use several IPL
commands to send the RLE file to the printer. These are the commands
accompanied by their descriptions:
Purpose: Instructs the printer to receive RLE compressed graphics data in nibblized
format.
Default: m = 0
Syntax:
<ESC>g m
Where m specifies the format of the data to follow.
m = 0
m = 1
When you select m = 0, the printer parses subsequent data streams as RLE
commands. The printer still recognizes immediate IPL commands. Non-
immediate commands are not parsed. The printer resumes normal IPL parsing
when it receives an end of bitmap RLE command.
When you select m = 1, the printer receives the RLE compressed graphics data
in nibblized format. The printer converts each pair of bytes from ASCII to their
numerical equivalent and then combines them to form the original byte. For
example:
1,B
8 bits per byte.
7 bits per byte of nibblized data.
0x1,0xB 0x1B