Printek 4503 - Manual (Page 87)

DEC LA120 Emulation
Page 5-3
Control Codes and Escape Sequences
Grouped by Function
Communications
Null NUL
This control code is ignored by the printer.
Control code: NUL
Hexadecimal: 00
Delete DEL
This control code is ignored by the printer.
Control code: DEL
Hexadecimal: 7F
End of Text ETX
If "ETX/ACK: On" is specified in the "Setup: INTERFACE" menu, then receipt of an
ETX causes the printer to transmit an ACK to the host computer.
Since the ETX may be a legal value within an escape sequence, it is the user's
responsibility to ensure that an ETX used for data handshake is not sent within an
escape sequence. The user must also ensure that the maximum block size or the
number of blocks sent at one time does not exceed the input buffer size of the printer.
ETX/ACK handshake is available only with serial I/O. It is not available when using
the parallel interface or the coaxial/twinaxial interface.
Control code: ETX
Hexadecimal: 03