Avalue ESM-A50M - Manual (Page 49)

Quick Installation Guide
ESM-A50M Quick Installation Guide 49
3.6.2.6 USB Configuration
The USB configuration menu is used to read USB configuration information and configure
the USB setting.
3.6.2.6.1 Legacy USB support
Use the Legacy USB Support BIOS option to enable USB mouse and USB keyboard
support. Normally if this option is not enabled, any attached USB mouse or USB keyboard
does not become available until a USB compatible operating system is fully booted with all
USB drivers loaded. When this option is enabled, any attached USB mouse or USB
keyboard can control the system even when there is no USB driver loaded onto the system.
Options: Enabled, Disabled, Auto
3.6.2.6.2 EHCI Hand-off
This is a workaround for OSes without EHCI hand-off support. The EHCI ownership change
should be claimed by EHCI driver.
Options: Enabled, Disabled