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2.11 Jumpers Setup
The illustration shows how jumpers are
setup. When the jumper cap is placed on
pins, the jumper is "Short". If no jumper cap
is placed on pins, the jumper is "Open". The
illustration shows a 3-pin jumper whose
pin1 and pin2 are "Short" when jumper cap
is placed on these 2 pins.
Jumper
Clear CMOS Jumper
(CLRCMOS1)
(see p.2, No. 46)
Note: CLRCMOS1 allows you to clear the data in CMOS. To clear and reset the
system parameters to default setup, please turn off the computer and unplug
the power cord from the power supply. After waiting for 15 seconds, use a
jumper cap to short pin2 and pin3 on CLRCMOS1 for 5 seconds. However,
please do not clear the CMOS right after you update the BIOS. If you need
to clear the CMOS when you just fi nish updating the BIOS, you must boot
up the system fi rst, and then shut it down before you do the clear-CMOS ac-
tion. Please be noted that the password, date, time, user default profi le, 1394
GUID and MAC address will be cleared only if the CMOS battery is removed.
The Clear CMOS Switch has the same function as the Clear CMOS
jumper.
BIOS Selection Jumper
(BIOS_SEL1)
(see p.2, No. 32)
Note: This motherboard has two BIOS onboard, a main BIOS and a backup BIOS,
which enhances protection for the safety and stability of your system. Nor-
mally, the system works on the main BIOS. However, if the main BIOS is
corrupted or damaged, please use a jumper cap to short pin2 and pin3, then
the backup BIOS will take over on the next system boot. After that, short pin1
and pin2 again, then use "ASRock Instant Flash" or "ASRock Internet Flash"
in BIOS setup utility to copy the BIOS fi le to the main BIOS to ensure normal
system operation. For the sake of system safety, users cannot update the
backup BIOS manually.
36
ASRock Z77 OC Formula Motherboard
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Setting
Description
Default
Clear CMOS
Default
Backup BIOS
(Main BIOS)
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