Intel Vig390s - Manual (Page 21)

Vig390s Motherboard Manual V1.0 20
The BIOS setup utility can be configured to boot firstly from either the LS120 or
standard 3½” floppy drive.
Real-Time Clock, CMOS SRAM and Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at
25 ºC with 3.3 VSB applied.
Note: If the battery and AC power fail, custom defaults, if previously saved, will be
loaded into CMOS RAM at power-on.
I/O Controller
The I/O controller (Intel® 6300ESB I-O Controller Hub) provides the following
features:
• One serial port (optional second serial port).
• One parallel port with Extended Capabilities Port (ECP) and Enhanced
Parallel Port (EPP) support
• Serial IRQ interface compatible with serialised IRQ support for PCI systems
PS/2-style mouse and keyboard interfaces
• Interface for one 1.44 MB diskette drive
• PCI-X 64/66 ports
• PCI 32/33 ports
• Two P-ATA ports
• Two S-ATA ports with configurable Intel RAID 0 and 1 support
• Intelligent power management, including a programmable wake-up event
interface
• SMBus hardware management support
• Integrated USB hub
By default, the I/O controller interfaces are automatically configured during boot up.
The I/O controller can also be manually configured in the Setup program
.
Serial Ports
One 9-pin D-Sub serial port connector is located on the back panel and is compatible
with NS16C550 UARTs.