Acer AB460 F1 User Manual - Page 239

219 AB2x280 F1 System BIOS Introduction This chapter describes the BIOS for AB2x280 F1blade modules. The AB2x280 F1blade modules use a AMI™ ROM BIOS that is stored in a flash chip. This BIOS can be easily upgraded using a floppy disk-based program. BIOS BIOS stands for Basic Input Output System. The AMI BIOS flash chip stores the system parameters, types of disk drives, video displays, etc. in the CMOS. The CMOS memory requires very little electrical power. When the blade unit is turned off, a backup battery provides power to the BIOS flash chip, enabling it to retain system parameters. Each time the blade is powered on it is configured with the values stored in the BIOS ROM 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 "Starting the Setup Utility" below.) Starting the Setup Utility 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. Warning! To prevent possible boot failure, do not shut down or reset the system while updating the BIOS.