Hardware Secrets
Home | Camera | Case | CE | Cooling | CPU | Input | Memory | Mobile | Motherboard | Networking | Power | Storage | Video | Other
Content
Articles
Editorial
First Look
Gabriel’s Blog
News
Reviews
Tutorials
Main Menu
About Us
Awarded Products
Datasheets
Dictionary
Download
Drivers
Facebook
Links
Manufacturer Finder
Newsletter
RSS Feed
Test Your Skills
Twitter
Newsletter
Subscribe today!


Home » Dictionary » Motherboard

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numeric

CMOS
Author: Gabriel Torres Last Updated: June 30, 2005
Category: Motherboard

Complementary Metal Oxide Semiconductor

CMOS is a integrated circuit manufacturing technology. This technology can be subdivided in PMOS (if a P-type semiconductor is used, i.e. with positive charge) and in NMOS (if a N-type semiconductor is used, i.e. with negative charge). Many integrated circuits are manufactured using this technology.

In PC CMOS is synonym of configuration memory, because this memory is manufactured with this technology.

The configuration memory is used to store hardware configuration data such as hard disk type and boot sequence.

The configuration memory (or CMOS, as you wish) is a RAM memory, meaning that its contents are erased when its power is cut. In order to avoid that, CMOS it is fed by a battery, that also feeds the system real time clock (RTC).

The configuration memory contents can be altered using a software called setup, which can be called by hitting the Del key while the computer is counting memory when you turn it on.

Nowadays the configuration memory is embedded inside the motherboard chipset, in a circuit called south bridge.

South Bridge
click to enlarge
Example of a south bridge chip.

Related Terms:

Print Version | Send to Friend | Bookmark this Term

There are 369 terms in our database.


RSSLatest Content
Gigabyte X99-UD3 Motherboard
October 30, 2014 - 8:30 AM
ASUS X99-A Motherboard
October 29, 2014 - 3:00 AM
ASUS ZenFone 5 Smartphone Review
October 15, 2014 - 7:00 PM
ASUS AM1M-A Motherboard
October 15, 2014 - 4:30 AM
ASRock X99 Extreme4 Motherboard
October 14, 2014 - 4:10 AM
Cooler Master Elite 130 Case Review
October 9, 2014 - 2:46 AM
ASUS RAMPAGE V EXTREME Motherboard
October 7, 2014 - 2:50 AM
ASRock Fatal1ty X99M Killer Motherboard
October 6, 2014 - 5:40 AM







2004-14, Hardware Secrets, LLC. All rights reserved.
Advertising | Legal Information | Privacy Policy
All times are Pacific Standard Time (PST, GMT -08:00)