may contain any of the major BIOS types. All newer computer systems use a technology called ash ROM, which ROM data to be updated by software, which is usually available throu motherboard or BIOS supplier. W i H Hlil II II 'i . ilill l . | I . i I I l . l l I II I I w The CPU needs to know things like what kind of hard dri' tached, how many drives are in the system, and how the ports are su to be congured. Without this basic information, the CPU will not l to boot or start up. The terms BIOS, ROM, and CMOS are often used interchangeably. E scribes a different device or system, but for practical purposes they all 3: refer to the information permanently stored on the motherboard abi devices that are attached.