Cmos

Technology is always changing and evolving and the complementary metal-oxide-semiconductor or CMOS is no different in that respect. CMOS is a type of nonvolatile warehousing that is utilise to store BIOS settings and is powered by a sharp battery on the motherboard. The CMOS RAM is the traditional name for this repositing but it is a misnomer now because the newer computers use EEP fixed storage or pulse computer depot now and the scarcely use of the battery on the motherboard is to keep the real time clock going. These two (CMOS RAM and real-time clock) have been joined in the Southbridge chipset now on newer motherboards.
The CMOS memory is actually a 64 or 128 byte battery-backed RAM memory module that is a part of the system clock chip. almost IBM PS/2 models have the capability for a 2k (2048 byte) CMOS ROM Extension. The extension was first used with clock-calendar cards for the IBM PC-XT, when the PC/AT (Advanced Technology) was introduced in 1985; the Motorola MC146818 became a part of the motherboard. Since the clock exclusively uses 14 of the RAM bytes, the rest are available for storing system physical body data. AMSTRAD 8086 machines were among the first to actively use the CMOS memory available and since they lead the AT, do not follow the AT standard.



Originally, IBM only used a small portion of CMOS memory, in the IBM PC/AT Technical Reference Manual these were defined as bytes 10h, 12h, 14h-18h, 2Eh-33h. The balances was left wing indeterminate but were quickly taken by motley BIOS manufacturers for user-selectable options like wait states, clock speeds, initial boot father selection, and password storage. Later, as CMOS memory requirements grew newer clock chips with 128 bytes of RAM came into use.
at once the AT standard was established, there was never any fate to store any more than 512 bytes in the memory because it holds only the most basic of boot settings. When the CMOS memory changed to EEPROM originally the EEPROM was only able to allow single byte operations making is...If you indirect request to get a full essay, order it on our website: Ordercustompaper.com



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