November 2022
Intermediate to advanced
1504 pages
42h 21m
English
book
CompTIA A+ Certification All-in-One Exam Guide, Eleventh Edition (Exams 220-1101 & 220-1102), 11th Edition
by Mike Meyers
Content preview from CompTIA A+ Certification All-in-One Exam Guide, Eleventh Edition (Exams 220-1101 & 220-1102), 11th Edition
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CHAPTER 5
Firmware
In this chapter, you will learn how to
• Define and explain the function of firmware, UEFI, BIOS, CMOS, ROM
• Distinguish among various system setup utility options
• Troubleshoot using the power-on self-test (POST)
• Maintain BIOS/UEFI settings
In Chapter 3 you saw how the address bus and data bus connect RAM to the CPU via the memory controller to run programs and transfer data. Assuming you apply power in the right places, you don’t need anything else to make a simple computer. The only problem with such a simple computer is that it would bore you to death—there’s no way to do anything with it! A PC needs devices such as keyboards and mice to provide input, and output devices such as monitors and speakers to communicate ...