H61MHV/H61MGV/H61MLC2/H61MLV2 UEFI BIOS Manual
10
USB Configuration
Legacy USB Support
This item determines if the BIOS should provide legacy support for USB
devices like the keyboard, mouse, and USB drive. This is a useful feature
when using such USB devices with operating systems that do not natively
support USB (e.g. Microsoft DOS or Windows NT).
Options: Enabled (Default) / Disabled / Auto
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: Disabled (Default) / Enabled
Port 60/64 Emulation
This items enables I/O port 60h/64h emulation support. This should be
enabled for the complete USB keyboard legacy support for non-USB aware
OSes.
Options: Enabled (Default) / Disabled
USB transfer time-out
The time-out value for Control, Bulk, and Interrupt transfers.
Options: 20 sec (Default) / 1 sec / 5 sec / 10 sec
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