Chapter 4: BIOS Chapter 4 BIOS 4-1 Introduction This chapter describes the Phoenix BIOS™ Setup utility for the C2SBM-Q.The Phoenix ROM BIOS is stored in a flash chip and can be easily upgraded using a floppy disk-based program. Note: Due to periodic changes to the BIOS, some settings may have been added or deleted and might not yet be recorded in this manual. Please refer to the Manual Download area of the Super Micro web site com> for any changes to the BIOS not reflected in this manual. System BIOS The BIOS is the Basic Input Output System used in all IBM ® PC, XT™, AT ® , and PS/2 ® compatible computers.
The Phoenix BIOS stores the system parameters, types of disk drives, video displays, etc. in the CMOS. The CMOS memory requires very little electrical power. When the computer is turned off, a backup battery pro- vides power to the CMOS logic, enabling it to retain system parameters. Each time the computer is powered on, the computer is configured with the values stored in the CMOS logic by the system BIOS, which gains control at boot-up. How To Change the Configuration Data The CMOS information that determines the system parameters may be changed by entering the BIOS Setup utility. This Setup utility can be accessed by pressing the key at the appropriate time during system boot.
(See below.) Normally, the only visible POST (Power On Self Test) routine is the memory test. As the memory is being tested, press the key to enter the main menu of the BIOS Setup utility. From the main menu, you can access the other setup screens, such as the Security and Power menus. Beginning with Section 4-3, detailed de- scriptions are given for each parameter setting in the Setup utility. Starting the Setup Utility Warning: Do not shut down or reset the system while updating the BIOS to prevent possible boot failure. ! 4-1