12.USB 2.0 setting (3pin USB_EN) (on USB 2.0 models only)

This jumper allows you to enable or disable the Universal Serial Bus (USB) 2.0 capability. Set to Enable (pins 1-2) if you wish to use USB 2.0 compliant devices.

 

 

USB_EN

P4B266-E

1

2

2 3

 

 

Enable Onboard

Disable

P4B266-E USB Setting

NEC USB

 

(Default)

 

13.Clear RTC RAM (C219)

These solder points allow you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The RAM data in CMOS, that include system setup information such as system passwords, is powered by the onboard button cell battery.

To erase the RTC RAM:

1.Turn OFF the computer and unplug the power cord.

2.Remove the battery.

3.Short the solder points.

4.Re-install the battery.

5.Plug the power cord and turn ON the computer.

6.Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data.

 

Intel I/O

 

Controller

 

Hub

 

(ICH2)

 

(C219)

 

CLRTC

P4B266-E

Short solder points

 

 

to Clear CMOS

P4B266-E Clear RTC RAM

2-24

Chapter 2: Hardware information