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What is difference between BIOS and CMOS?
CMOS is an abbreviation for Complementary Metal Oxide Semiconductor, which refers to a technology used to manufacture large integrated circuit chips or chips made with this technology. read and write characteristics, used on computer motherboard to store data after BIOS has set computer hardware parameters. This chip is used only for data storage.
BIOS is an abbreviation for "Basic Input Output System" in English. After a literal translation, Chinese name is "Basic Input Output System". On IBM PC compatible systems, this is standard firmware interface.
The history of early inventions is different
1. BISO: The term BIOS (Basic Input/Output System) was originally coined by Gary Kildall and first appeared in CP/M operating system in 1975. Describes hardware that interface loads directly when machine-specific parts of CP/M start up. (The CP/M machine usually only has a simple bootloader in ROM).
2. CMOS: since Texas Instruments (TI) invented integrated circuit (IC) in 1958. Compared to BJT's main competitor, early CMOS components are easily damaged by electrostatic discharge (ESD). Most new generation CMOS chips have ESD protection circuits on input/output pins (I/O pins) and power and ground terminals to prevent gate internal circuitry or PN junction (PN junction) in components. from damage. High current caused by electrostatic discharge will burn out.
Second, different functions
1. BIOS: first, self-test and initialization, software service processing, hardware interrupt handling
2. CMOS: It is then used to store computer information. CMOS is used as a writable chip. In this area, users usually don't care about CMOS hardware issues, but only care about information written on CMOS, i.e. BIOS. The most commonly cited issue is removing battery on motherboard when system crashes and performing a CMOS drain operation to restore BIOS settings. In field of digital imaging, CMOS has been developed as a low cost technology for photosensitive elements. CCD photosensitive element. In field of more professional design and manufacture of integrated circuits.
BIOS stores important system information and a setup program for configuring system settings, while CMOS is a read/write RAM chip on motherboard that contains certain system configuration settings and can be read using setup. Write. Simply put, BIOS is program and CMOS is chip.
BIOS is compared to human soul, CMOS is compared to human body, this is relationship between soul and body;
So full statement should be "set CMOS settings using BIOS setup program". Since both BIOS and CMOS are closely related to system settings, statements about BIOS settings and CMOS settings during actual use actually refer to same thing, but BIOS and CMOS are two completely different concepts, do not confuse.