PM845G Series Mainboard
18
Front Serial interface Header: COM2
This mainboard supports a front serial header. Connect with a bracket, then you can use
other serial interface device.
Pin
Assignment
Pin
Assignment
1
DCD
2
DSR
3
SIN
4
RTS
5
SOUT
6
CTS
7
DTR
8
RINGW
9
GND
10
NC
Clear CMOS Jumper: JP1
JP1
Assignment
Pin 1-2 Close
Î
Normal
(default)
Pin 2-3 Close
Î
Clear CMOS
1. Turn off your system and remove AC power line.
2. Set JP1 to OFF (2-3 Closed).
3. Wait several seconds.
4. Set JP1 to ON (1-2 closed).
5. Connect the AC power line and turn on your system.
6. Reset your desired password or clear CMOS data.
Case Open Warning Header: CASE OPEN
This connector is used to modify the user when the computer case has been previously
opened. To configure this functionality, your computer case must be equipped with a
“case open” cable which you need to attach to the CASE OPEN connector. Also, you
must enable CASE OPEN Warning Functionality in the BIOS setup utility. When your
computer case is opened, your system will display alert messages upon boot up.
Case Open
Assignment
1
INTRUDR-
2
GND
The following procedures are for resetting the
BIOS password. It is important to follow these
instructions closely.
格式化
格式化