diff between BIOS and CMOS?

sample text · April 25, 2018

What's the difference between BIOS and CMOS?As far as I know both are chips in the motherboard and the CMOS contains the settings of BIOS(hardware settings,date and time etc).When we boot the PC,the BIOS pulls the information stored in the CMOS so it will know what are the settings of the hardware.It's impossible to boot PC without BIOS ,because it won't know the hardware settings(how the hardware components are communicating).If we want to reset BIOS settings,we have to remove CMOS battery..is this basicly how BIOS and CMOS are working?

Dylanc1500 · April 25, 2018

52 minutes ago, sample text said:

What's the difference between BIOS and CMOS?As far as I know both are chips in the motherboard and the CMOS contains the settings of BIOS(hardware settings,date and time etc).When we boot the PC,the BIOS pulls the information stored in the CMOS so it will know what are the settings of the hardware.It's impossible to boot PC without BIOS ,because it won't know the hardware settings(how the hardware components are communicating).If we want to reset BIOS settings,we have to remove CMOS battery..is this basicly how BIOS and CMOS are working?

Complementary metal–oxide–semiconductor (CMOS), is just a technology that is used to create different integrated circuits, including the design and the process used to incorporate that into integrated circuits, including analog circuits.

CMOS is technically the circuitry itself, which holds the BIOS instruction.

The BIOS name originates from the Basic Input/Output System used in the CP/M operating system in 1975. It is the first software that the processor runs upon boot up, and used to test system components and is used to find boot loaders for the operating system. It is nothing more than a set of instructions that is used at first power on.

This is a very rough summary and could be eloborated on much further and more in depth. If you have more want to learn more on them then I would definitely recommend researching them, as they are quite an interesting topic.

Anyways if you have any further questions feel free to ask!

Blasteque · April 25, 2018

3 hours ago, Dylanc1500 said:

Complementary metal–oxide–semiconductor (CMOS), is just a technology that is used to create different integrated circuits, including the design and the process used to incorporate that into integrated circuits, including analog circuits.

CMOS is technically the circuitry itself, which holds the BIOS instruction.

The BIOS name originates from the Basic Input/Output System used in the CP/M operating system in 1975. It is the first software that the processor runs upon boot up, and used to test system components and is used to find boot loaders for the operating system. It is nothing more than a set of instructions that is used at first power on.

This is a very rough summary and could be eloborated on much further and more in depth. If you have more want to learn more on them then I would definitely recommend researching them, as they are quite an interesting topic.

Anyways if you have any further questions feel free to ask!

To expand on what Dylan said:

https://en.wikipedia.org/wiki/Nonvolatile_BIOS_memory