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Chapter 4: BIOS
4-9
USB Confi guration
This submenu displays the Module Version and lists the USB devices that are
enabled as well as the following options.
Legacy USB Support
Select "Enabled" to enable the support for USB Legacy. Disable Legacy support
if there are no USB devices installed in the system. "Auto" disabled Legacy
support if no USB devices are connected. The options are Disabled, Enabled
and Auto.
USB 2.0 Controller Mode
Use this setting to confi gure the USB 2.0 Controller in either Hi-Speed (480 Mps)
or Full Speed (12 Mps) mode.
BIOS EHCI Hand Off
This is a workaround for OS's without EHCI hand-off support. The EHCI
ownership change should be claimed by the EHCI driver. Options are Enabled
or Disabled.
Legacy USB1.1 HC Support
This option Enables or Disables support for USB1.1 HC devices.
USB Mass Storage Device Confi guration
This submenu is used to confi gure USB mass storage class devices.
USB Mass Storage Reset Delay
Use this option to set the number of seconds POST waits for the USB mass
storage device after the Start Unit command. Options include 10, 20, 30 and
40 seconds.
Emulation Type
This sets the emulation type for USB mass storage devices. If Auto, USB
devices less than 530 MB will be emulated as Floppy and remaining as Hard
Disk drive. The Force FDD option can be used to force a HDD formatted drive
to boot as an FDD (example: ZIP drive). Options include Auto, Floppy, Forced
FDD, Hard Disk and CD-ROM.