System Features
VL-EPICs-36 Reference Manual
23
Warning!
If CMOS Setup default settings make the system unbootable and prevent the user
from entering CMOS Setup, the system can be recovered by switching to the
backup BIOS.
D
EFAULT
CMOS
RAM
S
ETUP
V
ALUES
After CMOS RAM is cleared, the system will load default CMOS RAM parameters the next time
the board is powered on. The default CMOS RAM setup values will be used in order to boot the
system whenever the main CMOS RAM values are blank, or when the system battery is dead or
has been removed from the board.
P
RIMARY AND
B
ACKUP
BIOS
The Primary system BIOS is field upgradeable using the BIOS upgrade utility (see the
for more information). Jumper VN[1-2] controls whether the system uses the
Primary or Backup BIOS. By default the Primary BIOS is selected (jumper removed).
Real Time Clock
The VL-EPICs-36 features a year 2000-compliant, battery-backed 146818-compatible real-time
clock/calendar chip. Under normal battery conditions, the clock maintains accurate timekeeping
functions when the board is powered off.
S
ETTING THE
C
LOCK
The CMOS Setup utility (accessed by pressing the Delete key during the early boot cycle) can be
used to set the time and date of the real time clock.