BIOS/UEFI Flashcards
(BIOS)
Basic Input/Output System
(BIOS)
Program that a CPU uses to start the computer system
BIOS
BIOS serves as a method of configuring the motherboard using a textbased interface
Firmware
Software on a chip and contains BIOS program code in the flash memory
of a motherboard
Unified Extensible Firmware Interface (UEFI)
Supports 64-bit processors and provides a GUI
Boot Options:
(BIOS)
Program a computer’s microprocessor uses to start and boot after being
turned on
an example of firmware..
(BIOS)
Power-on self-test
● Hardware configuration
● Boot order setup
(ROM)
Read-Only Memory
(ROM)
Type of chip embedded in the motherboard and can be upgraded
through flashing
uses an internal lithium-ion battery that can last up to 10 years
The new CMOS
(POST) stands for?
Power-On Self-Test
(POST) does what?
Diagnostic testing sequence to check the computer’s basic input/output
system
What is used to tell what is wrong with the system?
Variable beeps
relied on a text-based menu system and a keyboard as its system of
input
BIOS
Two short beeps and one long beep
Keyboard is not detected
has a low-level OS which allows to take input and give output to
the basic components
The BIOS
To configure the settings inside CMOS, you would go into?
enter the BIOS configuration
environment
(UEFI)
Unified Extensible Firmware Interface
(UEFI)
Updated form of BIOS that allows keyboard and mouse as input and
provides a GUI
(UEFI)
● Supports 64-bit systems
● Supports larger HDDs and SSDs (9.4 zettabytes ~ 9.4 x 10^21
bytes)
● Supports the new GUID Partition Table (GPT) format
● Faster boot-up system
● Uses a larger ROM size
o Flashing
Performed during upgrades, security fixes, or feature improvements
Flashing steps..
Back up the configuration and information
● Use a USB flash drive to flash the firmware
● The BIOS or UEFI will copy the firmware to the system and
overwrite the old code
are used during loading and booting up the OS
BIOS and UEFI
Computers that rely on BIOS use..
MBR to hold the boot information
