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pin# Signal In or
out
Function
name
4
RTS OUT Always space
5
CTS
—
Spacewhen 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 Spacewhen printer ready to
receive (echoes DTR (20)).
12
NC
Unused
13 GND - Signal ground
14-19 NC
Unused
20
DTR OUT
Turnedto Spacewhen 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