Intel 945GC, 945GZ Jumpers & Headers Setup, Checking Jumper Settings, CMOS Memory Clearing Header

Intel 945 Series User's Manual

Chapter 3 Jumpers & Headers Setup

3.1 Checking Jumper Settings

•For a 2-pin jumper, plug the jumper cap on both pins will make it CLOSE (SHORT). Remove the jumper cap, or plug it on either pin (reserved for future use) will leave it at OPEN position.

• For 3-pin jumper, pin 1~2 or pin 2~3 can be shorted by plugging the jumper cap in.

How to identify the PIN1 jumpers?

Please check the mainboard carefully, the PIN1 is marked by "1" or white thick line.

3.2 CMOS Memory Clearing Header

The time to clear the CMOS memory occurs when (a) the CMOS data becomes corrupted, (b) you forgot the supervisor or user password preset in the BIOS menu, (c) you are unable to boot-up the system because the CPU ratio/clock was incorrectly set in the BIOS menu, or (d) whenever there is modification on the CPU or memory modules.

This header uses a jumper cap to clear the CMOS memory and have it reconfigured to the default values stored in BIOS.

•Pins 1 and 2 shorted (Default): Normal operation.

•Pins 2 and 3 shorted: Clear CMOS memory.

Normal (Default)

1 2 3

Clear CMOS

1 2 3

JBAT or CLR_ CMOS1

To clear the CMOS memory and load in the default values:

1.Power off the system.

2.Set pin 2 and pin 3 shorted by the jumper cap. Wait for a few seconds. Set the jumper cap back to its default settings --- pin 1 and pin 2 shorted.

3.Power on the system.

4.For incorrect CPU ratio/clock settings in the BIOS, press <Del> key to enter the BIOS setup menu right after powering on system.

5.Set the CPU operating speed back to its default or an appropriate value.

6.Save and exit the BIOS setup menu.

3.3 Keyboard Power Function(JKB)

Disabled (Default)

Pin 1-2 short: Disabled power on by keyboard		1 2 3
Pin 2-3 short: Support power on by keyboard	JKB:		Enabled
		1 2 3

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