Biostar 865G MICRO 775 Spécifications télécharger pdf (Page 29)

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How Startup BIOS Controls the Boot Process

Sometimes a motherboard contains an on-board component more commonly offered as a

separate device. One example is support for video. The video port might be on the motherboard

or might require a video card. The cost of a motherboard with an embedded component is

usually less than the combined cost of a motherboard with no embedded component and an

expansion card. If you plan to expand, be cautious about choosing a proprietary board that has

many embedded components. Often such boards do not easily accept add-on devices from other

manufacturers. For example, if you plan to add a more powerful video card, you might not

want to choose a motherboard that contains an embedded video controller. Even though you

can often disable the proprietary video controller in BIOS setup, there is little advantage to

paying the extra money for it.

HOW STARTUP BIOS CONTROLS THE BOOT PROCESS

When you first turn on a PC, startup BIOS on the motherboard is in control until

the operating system is loaded and takes over. In this part of the chapter, you’ll learn

what startup BIOS does to boot up the system, check and initialize critical hardware

components, find an OS, begin the process of loading that OS, and then turn over

control to the OS. The purpose of this part of the chapter is to help you understand

how startup BIOS controls the boot. Later in the chapter, you’ll learn how to use

this knowledge to help you troubleshoot a failed boot before the operating system

is loaded.

Abit www.abit.com.tw

ASUS www.asus.com

BIOSTAR Group www.biostar.com.tw

Evga www.evga.com

Foxconn www.foxconn.com

Gigabyte Technology Co., Ltd. www.giga-byte.com

Intel Corporation www.intel.com

Micro-Star International (MSI) www.msicomputer.com

Super Micro Computer, Inc. www.supermicro.com

Tyan Computer Corporation www.tyan.com

Manufacturer Web Address

Table 3-6 Major manufacturers of motherboards

Tip

If you have an embedded component, make sure you can disable it so you can use

another external component if needed. Components are disabled in BIOS setup.

Table 3-6 lists some manufacturers of motherboards and their Web addresses.

A+ Exam Tip

The A+ 220-701 Essentials exam expects you to know how BIOS controls POST and the

beginning of the boot.

A+ 220-701

A+

220-701

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