Ricoh 337943-003 Benutzerhandbuch

The PostScript I/O mode can be selected on a per Virtual Printer basis via the Web 
menu:

In the TBCP mode the printer will recognize and process the special characters as 
specified in the table below.

The ^C special character causes an interrupt error. Data that follows a ^C character is 
discarded until a ^D character is received.

The ^T special character causes PostScript to return its status via the back-channel.  If 
the PostScript interpreter is waiting for a job, the status string “%%[ status: idle ]%%”  
is sent.  If the PostScript interpreter is busy processing a job, the status string “%%[ 
status: busy; source: Network ]%%”  is sent.

The ^D special character forces the end of PostScript job.

To transmit control characters as data, the host software must quote the character.  
Quoting is done by replacing the character with the two-character sequence: ^A 
followed by the character itself XOR-ed with 0x40.  For example, to send a byte with 
the hex value 0x14, the two-byte sequence 0x01 0x54 is sent.

All other special characters are ignored.

^A

SOH

0x01

Quote data character

See Control Function

^C

ETX

0x03

Generate an interrupt error

See Control Function

^D

EOT

0x04

End of file marker

See Control Function

^E

ENQ

0x05

Reserved

Ignored

^Q

DC1

0x11

XON in XON/XOFF flow control

Ignored

^S

DC3

0x13

XOFF in XON/XOFF flow control

Ignored

^T

DC4

0x14

Job status request

See Control Function

^[

ESC

0x1B

Start of end protocol sequence

See Control Function

^\

FS

0x1C

Reserved

Ignored