Epson EQUITY 386SX/16 PLUS - Manual (Page 27)

Using the Serial Interface
If you have a printer, a modem, or other peripheral device
with a serial interface, you can connect it to the serial
(RS-232C) port on the back of the computer.
The serial port uses a DB-9P connector, so be sure you have a
compatible cable. To connect a serial device, follow the same
steps as above for connecting a parallel device but insert the
connector into the serial port, marked with a special icon, as
shown below.
r
Note
You need to ensure that the serial port is set up so it
functions properly. If you are using the port for a serial
printer, you need to redirect printer output to the serial
port instead of the parallel port. To do this, you can use
the MS-DOS MODE or SETMODE command. See your
MS-DOS Reference Manual for instructions.
Setting Up Your System
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