Intel Desktop Board D815EEA2/D815EPEA2 Technical Product Specification
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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, mice, and
hubs are recognized and may be used to configure the operating system. (Keyboards, mice, and
hubs are not recognized during this period if legacy USB support was set to Disabled in the
BIOS Setup program.)
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.
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