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Vig390s Motherboard Manual V1.0
61
Advanced Configuration and Power Interface (ACPI)
ACPI gives the operating system direct control over the power management and
Plug and Play functions of a computer. ACPI requires an ACPI-aware operating
system. ACPI features include:
• Plug and Play (including bus and device enumeration) and APM functionality
normally contained in the BIOS.
• Power management control of individual devices, add-in boards, video displays,
and hard disk drives.
• Methods for achieving less than 30-watt system operation in the Power On
Suspended sleeping state, and less than 5-watt system operation in the
Suspended to Disk sleeping state.
• A soft-off feature that enables the operating system to power off the computer.
• Support for multiple wake up events.
• Support for a front panel power and sleep mode switch. Table 29 describes the
system states based on how long the power switch is pressed, depending on how
ACPI is configured with an ACPI-aware operating system.
Table 29: Effects of Pressing the Power Switch
If the system is in this
state…
… and the power switch is
pressed for
…the system enters
this state
Off Less than 4 seconds Power On
On Less than 4 seconds Soft Off/ Suspended
On More than 4 seconds Fail safe power off
Sleep Less than 4 seconds Wake up
Under ACPI, the operating system directs all system and device power state
transitions. The operating system puts devices in and out of low-power state based
on user preferences and knowledge of how devices are being used by applications.
Devices that are not being used can be turned off. See Power Management section
in Chapter 1, Page 28 for more information on ACPI.
Language Support
The Setup program and help messages can be supported in 32 languages. The
default language is American English, which is present unless another language is
programmed into the BIOS using the flash memory update utility.
Boot Options
In the Setup program, the user can choose to boot from a floppy drive, hard drive,
CD-ROM, or the network. The default setting is for the floppy drive to be the primary
boot device and the hard drive to be the secondary boot device. By default the third
and fourth devices are disabled.
Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM
format specification. Under the Boot menu in the Setup program, CD-ROM is listed
as a boot device. Boot devices are defined in priority order. If the CD-ROM is
selected as the boot device, it must be the first device.