Printer handshaking – Tally Genicom Matrix Printer User Manual

Page 12

7265 Programmer’s Manual

inter Handshaking

Commands

Description

DC1

PRINTER READY

In serial interface, if the printer is strapped for XON/XOFF handshaking, then
the printer sends DC1 to the host to signal that the printer is ready to accept
data.

In parallel interface, if the printer is strapped for select/ deselect by received
DC1/DC3 codes, then the host sends DC1 to the printer to set the printer
online.

Dec 17

Hex 11

DC3

PRINTER NOT READY

In serial interface, if the printer is strapped for XON/XOFF handshaking, then
the printer sends DC3 to the host to signal that the printer cannot, for the
moment, accept any more data.

In parallel interface, if the printer is strapped for select/ deselect by received
DC1/DC3 codes, then the host sends DC3 to the printer to set the printer to
Standby. In Standby, the printer will accept and acknowledge data from the
interface, but will discard all data received.

Dec 19

Hex 13

ETX

ETX/ACK COMMUNICATION PROTOCOL

In serial interface, if the printer is strapped for ETX/ACK handshaking, then the
host sends the ETX control code at the end of a block of data.

Dec 3

Hex 03

ACK

ETX/ACK COMMUNICATION PROTOCOL

In serial interface, if the printer is strapped for ETX/ACK handshaking, then the
printer sends an ACK in response to and ETX from the host to indicate that it is
ready to receive more data.

Dec 6

Hex 06