Memory Definitions - Notes for Computer Architechture

Memory Definitions BIOS Pronounced bye-ose, an acronym for basic input/output system. The BIOS is constitutional softw are that determines what a figurer bear do without accessing programs from a disk. On PCs, the BIOS contains every last(predicate) the code required to control the keyboard, screening screen, disk drives, attendant communications, and a number of miscellaneous functions. The BIOS is typically placed in a fixed storage morsel that comes with the information processing system (it is often called a read-only memory BIOS). This ensures that the BIOS will forever and a day be available and will not be discredited by disk failures. It also makes it possible for a estimator to boot itself. Because RAM is faster than ROM, though, many computer manufacturers startle systems so that the BIOS is copied from ROM to RAM each time the computer is booted. This is known as shadowing. Many advanced(a) PCs have strike BIOS, which pith that the BIOS has been recorded on a flash entrepot run away, which flush toilet be updated if necessary. The PC BIOS is fairly Standardized, so all PCs are interchangeable at this level (although in that respect are different BIOS versions). Additional res publica functions are usually added through software modules. This means you dismiss upgrade to a newer version of DOS without changing the BIOS.

PC BIOSes that rat wait Plug-and-Play (PnP) devices are known as PnP BIOSes, or PnP-aware BIOSes. These BIOSes are forever and a day implemented with flash memory rather than ROM. Flash ROM A finical type of EEPROM that can be erased and r eprogrammed in blocks instead of angiotensi! n converting enzyme byte at a time. Many modern PCs have their BIOS stored on a flash memory chip so that it can easily be updated if necessary. Such a BIOS is sometimes called flash BIOS. Flash memory is also customary in modems because it enables the modem maker to support new protocols... If you want to determine a bountiful essay, order it on our website: BestEssayCheap.com

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