Advantech ARK-3381 Series, User Manual

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ARK-3381 User Manual 40
Chapter 4 Award BIOS Setup
4.1 Introduction
The Award BIOS ROM has a built-in setup program that allows users to
modify the basic system configuration. This information is stored in bat-
tery-backed memory (CMOS RAM) and it retains the setup information
when the power is turned off.
4.1.1 CMOS RAM Auto-backup and Restore
The CMOS RAM is powered by a system board button cell battery. When
BIOS setup is completed, the data in CMOS RAM is automatically
backed up to Flash ROM. If operating in a harsh industrial environment
causes a software error, BIOS will recheck the data in CMOS RAM and
automatically restore the original data from Flash ROM to CMOS RAM
for booting.
Note: If you intend to change the CMOS setting without restoring the pre-
vious backup, <Del> must be pressed within two seconds of the "CMOS
checksum error..." display screen message appearing. Then enter the
"Setup" screen to modify the data. If the "CMOS checksum error..." mes-
sage appears again and again, please check to see if the system battery
needs to be replaced.