81 
3  Overview of BIOS Features 
What This Chapter Contains 
3.1  Introduction..................................................................................... 81 
3.2  Resource Configuration ..................................................................... 82 
3.3  System Management BIOS (SMBIOS) ................................................. 83 
3.4  Watchdog Timer ............................................................................... 83 
3.5  Legacy USB Support ......................................................................... 84 
3.6  BIOS Updates .................................................................................. 84 
3.7  Boot Options .................................................................................... 85 
3.8  BIOS Security Features ..................................................................... 87 
 
3.1  Introduction 
The BIOS is stored in the Serial Peripheral Interface (SPI) Flash device and can be 
updated using a disk-based program.  The SPI contains the BIOS Setup program, 
POST, the PCI auto-configuration utility, and Plug and Play support. 
The BIOS displays a message during POST identifying the type of BIOS and a revision 
code.  The initial production BIOSs are identified as BX97520J.86A. 
When the BIOS Setup configuration jumper is set to configure mode and the computer 
is powered-up, the BIOS compares the CPU version and the microcode version in the 
BIOS and reports if the two match. 
The BIOS Setup program can be used to view and change the BIOS settings for the 
computer.  The BIOS Setup program is accessed by pressing the <F2> key after the 
Power-On Self-Test (POST) memory test begins and before the operating system boot 
begins.  The menu bar is shown below. 
 
Maintenance  Main  Advanced  Performance Security  Power  Boot  Exit 
 
 
NOTE 
The maintenance menu is displayed only when the board is in configure mode. 
Section 
2.8 on page 70 shows how to put the board in configure mode. 
The performance menu is an optional menu and not present on all versions of the 
board.