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Typical POST screen (AMI BIOS) Typical UEFI-compliant BIOS POST screen (Phoenix Technologies BIOS) Summary screen after POST and before booting an operating system (AMI BIOS) A power-on self-test ( POST ) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on.
BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...
POST cards for PCs, while originally high-priced, cost from just a few US dollars upwards in the 21st century. Some motherboards have a built-in display to diagnose hardware problems. Most also report POST errors with audible beeps, if a PC speaker is attached. Such motherboards make POST cards less necessary.
In 2023, researchers at firmware-focused cybersecurity company Eclypsium said 271 models of Gigabyte motherboards are affected by backdoor vulnerabilities. Whenever a computer with the affected Gigabyte motherboard restarts, code within the motherboard's firmware initiates an updater program that downloads and executes another piece of software.
Dell Precision T3600 System Motherboard, used in professional CAD Workstations. Manufactured in 2012. A motherboard (also called mainboard, main circuit board, MB, mobo, base board, system board, or, in Apple computers, logic board) is the main printed circuit board (PCB) in general-purpose computers and other expandable systems.
Windows Vista Business, Windows Vista Enterprise, and Windows Vista Ultimate additionally include Windows Complete PC Backup that allows system images to be created, and this feature can be started from Windows Vista installation media so that images can be restored to a new hard disk or new hardware or if a PC has experienced hardware failures ...
The history of the personal computer as a mass-market consumer electronic device began with the microcomputer revolution of the 1970s. A personal computer is one intended for interactive individual use, as opposed to a mainframe computer where the end user's requests are filtered through operating staff, or a time-sharing system in which one large processor is shared by many individuals.
During its early years, the system received a mixed reception, due to its high price ($599 for a 60-gigabyte model, $499 for a 20 GB model), a complex processor architecture, and lack of quality games, but was praised for its Blu-ray capabilities and "untapped potential".