Asus M2N-MX SE - Manual (Page 74)

2-2 Chapter 2: BIOS setup
2.6 Boot menu
The Boot menu items allow you to change the system boot options. Select
an item then press to display the sub-menu.
2.6.1 Boot Device Priority
Boot Device Priority
1st Boot Device [1st FLOPPY DRIVE]
2nd Boot Device [Hard Drive]
3rd Boot Device [ATAPI CD-ROM]
1st ~ xxth Boot Device [1st Floppy Drive]
These items specify the boot device priority sequence from the available
devices. The number of device items that appears on the screen depends
on the number of devices installed in the system. Configuration options:
[xxxxx Drive] [Disabled]
Boot settings
Boot Device Priority
Removable Drives
Boot Settings Configuration
Security
Removable Drives
1st Drive [1st FLOPPY DRIVE]
2nd Drive [USB:Netac]
2.6.2 Removable Drives