Chapter 3. BIOS

This chapter covers the following subjects:

Understanding BIOS, CMOS, and Firmware—This section explains the motherboard’s firmware, known as the BIOS. It also describes the relationship between the CMOS and the BIOS.

Configuring the System BIOS—This section demonstrates how to access the BIOS and modify settings, for example, RAM, processor, and video settings.

Power-on self-test (POST) and Error Reporting—This section describes the POST and audible and visible errors that the POST reports.

BIOS Updates—In this section you learn how to upgrade the BIOS through a process known as flashing.

This chapter covers CompTIA A+ 220-801 objective 1.1 and CompTIA A+ 220-802 objective 4.2.

The basic input/output system (BIOS)

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