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I/O Setup 2-1
Chapter 2
I/O Setup
Postscript I/O Mode
The PostScript I/O mode can be selected on a per Virtual Printer basis via the Web
menu:
Manage / System / Virtual Printer-><PS virtual printer>->PostScript->
PostScript I/O Mode / Raw, Normal, or TBCP
TBCP
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.
ASCII
KEYBOARD
ASCII
NAME
VALUE
(HEX)
CONTROL FUNCTION PRINTER BEHAVIOR
^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