Jumpers; Clear Cmos Jumper: Clear_Cmos - VIA Technologies VIA P4PB 266E User Manual

Chapter 2
The VIA P4PB 266E 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 Jumper: 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). Follow the instructions below to
clear the data:
WARNING!

Jumpers

Socket 478
266E
1
3
Keep CMOS
You can clear the CMOS by shorting 1-2 pin while
the system is off. Then return it to the 2-3 pin
position. Avoid clearing the CMOS while the
system is on; this will damage the mainboard.
1 3
Clear CMOS
2-20
1 2 3
CLEAR_CMOS