Acer Altos R720 Series - Manual (Page 124)

4 BIOS setup 114
USB Confguration
The USB Configuration submenu allows you specify settings for USB
devices.
Parameter Description Option
USB Controller Enables or disables the USB controller.
If disabled, all the USB controllers will be
turned off and inaccessible to the OS.
Enabled
Disabled
Legacy USB
Support Enables or disables the support for
legacy USB devices. Enabled
Disabled
Port 60/64
Emulation Enables or disables the I/O port 60/64h
emulation support.
This parameter is enabled for complete
USB keyboard legacy support for non-
USB aware OS.
Enabled
Disabled
Device Reset
Timeout Select the number of seconds POST waits
for the USB mass storage device after
the start unit command. 20 Sec
10 Sec
30 Sec
40 Sec