Asus X99-M WS, Manual

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3-64 Chapter 3: BIOS setup
Chapter 3
Booting the system in DOS environment
To boot the system in DOS:
1. Insert the USB flash drive with the latest BIOS file and BIOS Updater to the USB port.
2. Boot your computer then press <F8> to launch the select boot device screen.
3. When the select boot device screen appears, insert the Support DVD into the optical
drive then select the optical drive as the boot device.
Please select boot device:
E1: ASUS DVD-E818A6T (4069MB)
USB DISK 2.0 (3824MB)
UEFI: (FAT) USB DISK 2.0 (3824MB)
Enter Setup

and

to move selection
ENTER to select boot device
ESC to boot using defaults
4. When the booting message appears, press <Enter> within five (5) seconds to enter
FreeDOS prompt.
Welcome to FreeDOS (http://www.freedos.org)!
C:/> d:
D:/>
5. On the FreeDOS prompt, type d: then press <Enter> to switch the disk from Drive C
(optical drive) to Drive D (USB flash drive).
ISOLINUX 3.20 2006-08-26 Copyright (C) 1994-2005 H. Peter Anvin
A Bootable DVD/CD is detected. Press ENTER to boot from the DVD/CD.
If no key is pressed within 5 seconds, the system will boot next priority
device automatically. boot:
Updating the BIOS file
To update the BIOS file:
1. On the FreeDOS prompt, type bupdater /pc /g and press <Enter>.
D:/> bupdater /pc /g