Legacy Usb Support; Boot Options; Cd-Rom Boot; Network Boot - Intel BLKD945GCCR Specification

3.6

Legacy USB Support

Legacy USB support enables USB devices to be used even when the operating
system's USB drivers are not yet available. Legacy USB support is used to access the
BIOS Setup program, and to install an operating system that supports USB.
Legacy USB support operates as follows:
1. When you apply power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing you to use a USB keyboard to
enter and configure the BIOS Setup program and the maintenance menu.
4. POST completes.
5. The operating system loads. While the operating system is loading, USB
keyboards and mice are recognized and may be used to configure the operating
system.
6. After the operating system loads the USB drivers, all legacy and non-legacy USB
devices are recognized by the operating system, and Legacy USB support from the
BIOS is no longer used.
To install an operating system that supports USB, follow the operating system's
installation instructions.
3.7

Boot Options

In the BIOS Setup program, the user can choose to boot from a diskette drive, hard
drives, CD-ROM, or the network. The default setting is for the diskette drive to be the
first boot device, the hard drive second, and the ATAPI CD-ROM third. The fourth
device is disabled.
3.7.1

CD-ROM Boot

Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM
format specification. Under the Boot menu in the BIOS Setup program, ATAPI CD-
ROM is listed as a boot device. Boot devices are defined in priority order. Accordingly,
if there is not a bootable CD in the CD-ROM drive, the system will attempt to boot
from the next defined drive.
3.7.2

Network Boot

The network can be selected as a boot device. This selection allows booting from the
onboard LAN or a network add-in card with a remote boot ROM installed.
Pressing the <F12> key during POST automatically forces booting from the LAN. To
use this key during POST, the User Access Level in the BIOS Setup program's Security
menu must be set to Full.
Overview of BIOS Features
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