CMOS And BIOS

• CMOS Battery supplies power to store Basic Input Output settings and keep real-time clock running.
• the BIOS (pronounced bye-oss) is a ROM chip found on motherboards that allows you to access and set up your computer system at the most basic level.
• The BIOS pictured is of an early AMIBIOS, a type of BIOS manufactured by AMI.
• The BIOS includes instructions on how to load basic computer hardware.
• It also includes a test referred to as a POST (Power-On Self-Test) that helps verify the computer meets requirements to boot up properly.
• POST - IT Test the computer hardware and make sure no errors exist before loading the operating system.
• Bootstrap Loader - Locate the operating system. If a capable operating system is located, the BIOS will pass control to it.
• BIOS drivers - Low-level drivers that give the computer basic operational control over your computer's hardware.
• BIOS setup or CMOS setup - Configuration program that allows you to configure hardware settings including system settings, such as computer passwords, time, and date.