Genicom GEK 00031B Programmer's Manual page 210

CRM
CUU
DA
Chapter 8. PPL3 Plus Emulation
Control Representation Mode: This sequence enters or exits a mode
in which the printer prints a graphic token for each byte. In this
mode, the printer does not act upon control characters.
Source: Application
Format
ESC 3 h Set CRM
ESC 3 l Reset CRM
Description
When Control Representation Mode is set, the printer does not act on
control or special characters, with the following exceptions:
Line Feed (LF) is printed as <LF> , then a Carriage Return/Line
▪
Feed is executed.
Form Feed (FF) is printed as <FF>, then a Form Feed is executed.
▪
▪ The Control Representation Mode reset command is printed as
<CSI> 3 1 , then is executed.
Cursor Up: Executes Vertical Position Backwards (VPB). CUU exists
for backwards compatibility with older printers only. Use VPB instead
of CUU. Future printers may not implement CUU.
Source: Application
Description
See VPB.
Printer Attributes: Requests the printer product identification. The
printer responds to the DA command by sending a Printer Attributes
Report (DAR). See DAR.
Use DA (generic response) for normal Print manager inquiries and
forward compatibility. Use DA (alias response) for backwards
compatibility with older printers.
It is recommended that you send this command with no parameter.
Although the DEC PPL3 parsing rules allow a parameter in any
control sequence, this command is traditionally sent without one.
Source: Print manager
Format
CSI PS c
Destination: Exception (debug tool)
Destination: Level 3 (outmoded command)
Destination: Levels 1, 2, 3
Ps (if present) must equal 0.
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GEK-00029B