User's Manual Part 2

Tally Dascom 2600/2610/PRN-7
Protocols
䕺 M
emory mode XON/XOFF
The received characters are stored in a FIFO buffer (first in/first out).
The characters are processed in this buffer.
The buffer capacity can be adjusted from 0 to 128 Kb.
If the buffer is full, the interface signals NOT READY (signal acknowledgement: Level 1,
-12 V) and XOFF (hex. 13, dec. 19). This results in stopping the data transmission. When
the FIFO buffer is empty again, the interface signals READY (level 0, +12 V) and XON
(hex.11, dec. 17). Data transmission can be continued.
In addition, the READY signal is influenced by the status of the printer (On/Off Line). If the
printer assumes an undefined state, the interface also signals NOT READY and XOFF.
䕺 Memory mode Robust XON/XOFF
Robust XON/XOFF is similar to XON/XOFF. However, the state of the printer (XON or
XOFF) is also periodically transmitted via the TxD line in the case of Robust XON/XOFF.
䕺 E
xtended menu functions with the ENQ/STX and ETX/ACK protocols selected
protocol
104