Intel D845GBV Technical Product Specification for Intel Desktop Boards using t - Page 51

Legacy USB Support - drivers windows 7

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BIOS Overview Non-Plug and Play operating systems, such as Windows NT, require an additional interface for obtaining the SMBIOS information. The BIOS supports an SMBIOS table interface for such operating systems. Using this support, an SMBIOS service-level application running on a non-Plug and Play operating system can obtain the SMBIOS information. For information about The Desktop Boards' compliance level with SMBIOS Refer to Section 1.4, page 13 3.5 Legacy USB Support Legacy USB support enables USB devices such as keyboards, mice, and hubs 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. By default, Legacy USB support is set to Enabled. 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. (Keyboards and mice are not recognized during this period if Legacy USB support was set to Disabled in the BIOS Setup program.) 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, verify that Legacy USB support in the BIOS Setup program is set to Enabled and follow the operating system's installation instructions. ✏ NOTE Legacy USB support is for keyboards, mice, and hubs only. Other USB devices are not supported in legacy mode. 51

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BIOS Overview
51
Non-Plug and Play operating systems, such as Windows NT, require an additional interface for
obtaining the SMBIOS information.
The BIOS supports an SMBIOS table interface for such
operating systems.
Using this support, an SMBIOS service-level application running on a
non-Plug and Play operating system can obtain the SMBIOS information.
For information about
Refer to
The Desktop Boards
’
compliance level with SMBIOS
Section 1.4, page 13
3.5 Legacy USB Support
Legacy USB support enables USB devices such as keyboards, mice, and hubs 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.
By default,
Legacy USB support is set to Enabled.
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.
(Keyboards and mice are
not recognized during this period if Legacy USB support was set to Disabled in the BIOS
Setup program.)
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, verify that Legacy USB support in the BIOS
Setup program is set to Enabled and follow the operating system
’
s installation instructions.
✏
NOTE
Legacy USB support is for keyboards, mice, and hubs only.
Other USB devices are not supported
in legacy mode.