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Chapter 2 Hardware Installation
Chapter 2
COM (Serial) Ports
COM 1 to COM 5 are fixed at RS232.
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
Connecting External Serial Ports
Your COM port may come mounted on a card-edge bracket. Install the card-edge bracket to
an available slot at the rear of the system chassis then insert the serial port cable to the COM
connector. Make sure the colored stripe on the ribbon cable is aligned with pin 1 of the COM
connector.
BIOS Setting
Configure the serial COM ports in the Advanced menu (“F71879 Super IO Configuration” and
“F71879 Second Super IO Configuration“ submenu) of the BIOS. Refer to the chapter 3 for
more information.
COM 5
COM 5: RS232
DCD-
TD
RD
DT
R-
GND
RT
S-
DSR
-
CTS-
RI
-
2
1
9
COM 1
COM 2
2
1
9
DCD-
TD
RD
DTR-
GND
RTS-
DSR-
CTS-
RI-
COM 3
COM 4
COM 1 to COM 4:
RS232
The 8-bit Digital I/O connector provides powering-on function to external devices that are
connected to these connectors. The pin functions of the 8-bit digital I/O connector are listed
below.
Digital I/O Connector
Digital I/O Connector
Pins
Pin Assignment
Pins
Pin Assignment
1
GND
2
+12V
3
DIO7
4
+12V
5
DIO6
6
GND
7
DIO5
8
+5V
9
DIO4
10
+5V
11
DIO3
12
GND
13
DIO2
14
+5V_Standby
15
DIO1
16
+5V_Standby
17
DIO0
18
GND
19
GND
19
1
2
Digital I/O