• Legacy USB Support—This setting specifies whether legacy USB support is enabled.
Legacy USB support refers to the ability to use a USB keyboard and mouse during
system boot or in a legacy operating system such as DOS. Valid options are Enabled,
Disabled, and Auto. The default value is Disabled.
• Overcurrent Reporting—This setting allows the BIOS to notify the operating system
about any USB ports that source too much current. The default value is Enabled.
Hardware overcurrent protection is always active and cannot be disabled.
• USB Transfer Timeout—This setting specifies the timeout value for Control, Bulk, and
Interrupt USB transfers. The default value is 20 seconds.
• Device Reset Timeout—This setting specifies the number of seconds the POST waits for
a USB mass storage device to start. The default value is 20 seconds.
• Device Power-Up Delay—This setting specifies the maximum time a device takes before
enumerating. Valid options are Auto and Manual. The default value is Auto. When set to
Auto, a root port is granted 100 ms, and the delay value of a hub port is assigned from the
hub descriptor.
Boot Setup Menu
The Boot Setup menu contains setting related to the boot process and the boot device priority.
• Boot Settings Configuration Submenu—This item accesses the Boot Settings
Configuration submenu.
• Boot Option Priorities—These settings specify the order in which the BIOS checks for
bootable devices, including the local hard disk drive, removable devices such as USB
flash disk drives or USB CD-ROM drives, or the PXE network boot agent. The BIOS
first attempts to boot from the device associated with 1st Boot Device, followed by 2nd
Boot Device and 3rd Boot Device. If multiple boot devices are not present, the BIOS
setup utility does not display all of these configuration options. To select a boot device,
press <Enter> on the desired configuration option and select a boot device from the
resulting menu. You can also disable certain boot devices by selecting Disabled.
Note Only one device of a given type is shown in this list. If more than one
device of the same type exists, use the appropriate device BBS priorities
submenu to re-order the priority of devices of the same type.
Boot Settings Configuration Submenu
The Boot Settings Configuration submenu applies alternate configurations to boot settings.
The factory default settings provide the most compatible and optimal configuration.
• Setup Prompt Timeout—This setting specifies the number of seconds the system waits
for a BIOS Setup menu keypress (the <Delete> key). The default value is 10 seconds.
• Bootup NumLock State—This setting specifies the power-on state of the keyboard
NumLock setting. The default value is On.
44 | ni.com | cRIO-904x User Manual
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