Mode COMn baud,pari ty,data length,stopbits,p

pin#	Signal	In or	Function
	name	out	Function
	name	out
4	RTS	OUT	Always space
5	CTS	—	Space when computer is ready to send
			data. The printer does not check this pin.
6	NC		Unused
7	(3ND	-	Signal ground
8-10	NC		Unused
11	RCH	OUT	Turned to Space when printer ready to
			receive (echoes DTR (20)).
12	NC		Unused
13	GND	-	Signal ground
14-19	NC		Unused
20	DTR	OUT	Turned to Space when printer ready to
			receive.
21-25	NC		Unused

Setting up an MS-DOS computer

If you are using an IBM PC or compatible running MS-DOS, edit the AUTOEXEC.BAT file to include a line that reads:

MODE LPT1: =COMn:

(n is the number of the serial port; either 1 or 2).

The line above will send printer output to the COMn serial port. Next, include the line:

MODE COMn: baud,pari ty,data length,stopbits,p

to set up the COMn port to match the DIP switch set-

tings on the serial-to-parallel converter. For example