Star Micronics IS-8H192 Guide D'utilisation page 10

Data Length
Data length is the number of bits that the computer transmits as one unit (byte)
of data. This setting is normally 8.
Switch 1
ON
OFF
Parity
Parity is a means of checking for errors in data transmissions.
Switch 2
ON ON or OFF
OFF
OFF
Protocol
Protocol is the communications convention that is used to allow the printer and
computer to regulate the flow of data. DTR is the most commonly used
protocol.
Switch 3
ON
ON
OFF
In the serial mode, your computer will use one of three protocols to ensure that
data is sent properly. Protocol (also sometimes called "handshaking") means
"who say what when," and is the way your printer tells your computer it is ready
to receive data. Your computer and printer communicate by sending protocol
codes (which can be found at the beginning of an ASCII table).
6
Data Length
8 bits
7 bits
Switch 5 Parity
ON
OFF
Switch 4
ON
OFF
ON
DOS/Windows Setting
DOS/Windows Setting
None
Odd
Even
8
7
N
O
E
Protocol
DTR
XON/XOFF
ETX/ACK