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Chapter 2
J
UMPERS
The mainboard provides jumpers for setting the mainboard's functions. This
section will explain how to change settings for your mainboard's functions
through the use of the jumpers.
Clear CMOS: CLEAR_CMOS
The onboard CMOS RAM stores system configuration data and has an
onboard battery power supply. The long-life battery has a lifetime of at least
5 years. If you want to clear the system configuration data from the CMOS
RAM, use the CLEAR_CMOS (Clear CMOS jumper). You can clear the CMOS by
shorting 1-2 pin while the system is off. Then return it to the 2-3 pin position.
Shorting the jumper while the system is on will damage the mainboard.
Setting
1
Clear
ON
Keep
OFF
COM3/COM4 Voltage Selector: J3, J4
Some devices require a different voltage than the default voltage on the
board. J3 and J4 enable you to choose between 5V and 12V on COM3 and
COM4 respectively. Since pin 9 on COM3/COM4 is reserved for switching
between 5V and 12V, COM3/COM4 can not carry an RI signal. The following
settings apply to both J3 and J4.
Setting
1
5V
ON
12V
OFF
2
3
ON
OFF
ON
ON
2
3
ON
OFF
ON
ON
24
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