Epson ActionNote - Manual (Page 81)

Checking the Serial Port Settings
The
COM
1 port is capable of sending and receiving data at a
variety of speeds and with many different protocols. This
means you need to configure the port to match the signals of
the serial device. As a general rule, choose the highest speed
(baud rate) and the protocol that provides the best error
detection.
Check the documentation that came with your serial device to
see if you need to adjust any of its settings.
Note
If your application program cannot send printer output
directly to the serial port, you can use the MS-DOS MODE
command to redirect the output. You can even tell the
computer to redirect printer and serial port settings
automatically if you place the appropriate MODE
commands in your AUTOEXEC.BAT file. See your MS-DOS
manual for instructions.
Using the EXT KB Port
You can use the EXT KB port to connect a variety of
PS/2-compatible pointing devices, including an external
keyboard or keypad. You can also connect the mouse adapter
to this port and then connect a PS/2 mouse or other pointing
device. The adapter has two ports,
which allow you to connect
both a pointing device and an external keyboard at the same
time. Connect each device as described in the following
sections.
Connecting Optional Devices 5-7