pin# Signal Inor
out Function
name
4RTS OUT Always space
5CTS —Spacewhen computer is ready to send
data.The printer does not check this pin.
6NC Unused
7(3ND -Signalground
8-10 NC Unused
11 RCH OUT Turnedto Space when printer readyto
receive(echoes DTR (20)).
12 NC Unused
13 GND -Signalground
14-19 NC Unused
20 DTR OUT Turnedto Space when printer readyto
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 aline
that reads:
MODE LPT1: =COMn:
(n is the number of the serial port; either 1or 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