When the system is powered on, the BIOS will perform diagnostics and initialize
system components, including the video system. (This is self-evident when the
screen first flicks before the Video Card header is displayed). This is commonly
referred as POST (Power-On Self Test).
Afterwards, the computer will proceed its final boot-up stage by calling the
operating system. Just before that, the user may interrupt to have access to
To allow the user to alter the CMOS settings, the BIOS provides a little program,
SETUP. Usually, setup can be entered by pressing a special key combination (DEL,
ESC, CTRL-ESC, or CRTL-ALT-ESC) at boot time (Some BIOSes allow you to enter
setup at any time by pressing CTRL-ALT-ESC). The AMI BIOS is mostly entered by
pressing the DEL key after resetting (CTRL-ALT-DEL) or powering up the computer.
You can bypass the extended CMOS settings by holding the
Cite This Essay
(1999, 10). The Power on Self Test. StudyMode.com. Retrieved 10, 1999, from http://www.studymode.com/essays/Power-Self-Test-872.html
"The Power on Self Test" StudyMode.com. 10 1999. 10 1999 <http://www.studymode.com/essays/Power-Self-Test-872.html>.
"The Power on Self Test." StudyMode.com. 10, 1999. Accessed 10, 1999. http://www.studymode.com/essays/Power-Self-Test-872.html.