A new BIOS that solves several problems with power management is available from the IBM bulletin board. See your hardware documentation for information about accessing the IBM bulletin board. The following beep codes would be heard at power on. All of these errors are hardware related, so call you motherboard manufacturer or reseller for help in correcting the problem. All of these errors are codes reported by bios 5.
All computer hardware has to work with software through an interface.
The BIOS is responsible for booting the computer by providing a basic set of instructions. Furthermore, it provides an interface to the underlying hardware for the operating system in the form of a library of interrupt handlers. Some older PC's cannot co-operate with all the modern hardware because their BIOS doesn't support that hardware. CMOS Complementary Metal Oxide Semiconductor. The CMOS power is supplied by a little battery, so its contents will not be lost after the PC is turned off.