system BIOS - définition. Qu'est-ce que system BIOS
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Qu'est-ce (qui) est system BIOS - définition

COMMON FIRMWARE SYSTEM USED TO INITIALIZE HARDWARE WHEN A COMPUTER BOOTS
BIOS ROM; ROM BIOS; BIOS Boot Sequence; Basic Input-Output System; Basic Input/Output System; BIOS Upgrades; BIOS settings; BIOS chip; BIOS setup; System BIOS; Basic Integrated Operating System; Bootblock; B I O S; Basic Input Output System; Flash BIOS; Flashing the BIOS; Flashing BIOS; ABIOS; Mebromi; ROM-BIOS; CBIOS; Basic input output system; BIOS flashing; Basic I/O System; Compatibility BIOS; Advanced BIOS; PC BIOS; PC-BIOS; BIOS (PC); XT BIOS; AT BIOS; PC/AT BIOS; PC/XT BIOS; IBM PC BIOS; IBM BIOS; IBM CBIOS; IBM ABIOS; PS/2 BIOS; PS/2 CBIOS; PS/2 ABIOS; Software licensing description table; SLIC table; BIOS features comparison; Basic input/output system; BIOS setup utility; Independent BIOS vendor; BIOS configuration utility; Built-in Operating System; ROMBIOS; Alternatives to BIOS; Generic BIOS; STD-BIOS; Standard BIOS; BIOS Setup; Legacy BIOS; PCI BIOS; PCIBIOS
  • An [[American Megatrends]] BIOS showing an "[[Intel]] CPU uCode Loading Error" after a failed attempt to upload microcode patches into the CPU
  • Award BIOS setup utility on a standard PC
  • BIOS replacement kit for a Dell 310 from the late 1980s.  Included are two chips, a plastic holder for the chips, and a chip puller.
  • A detached BIOS chip
  • [[Compaq Portable]] 386 BIOS
  • BIOS chips in a Dell 310 that were updated by replacing the chips
  • PLCC]] package in a socket.
  • Boot process
  • AMD]] BIOS chips for a [[Dell]] 310 computer from the 1980s. The bottom one shows the distinct window of an [[EPROM]] chip.

ROM BIOS         
ROMBIOS         
Read-Only Memory - Basic Input Output System (Reference: ROM, BIOS), "Style: ROM-BIOS"
Basic Input/Output System         
<operating system> (BIOS, ROM BIOS) The part of the {system software} of the IBM PC and compatibles that provides the lowest level interface to peripheral devices and controls the first stage of the bootstrap process, including installing the operating system. The BIOS is stored in ROM, or equivalent, in every PC. Its main task is to load and execute the operating system which is usually stored on the computer's hard disk, but may be loaded from CD-ROM or floppy disk at install time. In order to provide acceptable performance (e.g. for screen display), some software vendors access the routines in the BIOS directly, rather than using the higher level operating system calls. Thus, the BIOS in the compatible computer must be 100% compatible with the IBM BIOS. As if that wasn't bad enough, many application programs bypass even the BIOS and address the screen hardware directly just as the BIOS does. Consequently, register level compatibility is required in the compatible's display electronics, which means that it must provide the same storage locations and identification as the original IBM hardware. (1999-06-09)

Wikipédia

BIOS

In computing, BIOS (, BY-oss, -⁠ohss; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). The BIOS firmware comes pre-installed on an IBM PC or IBM PC compatible's system board and exists in some UEFI-based systems to maintain compatibility with operating systems that do not support UEFI native operation. The name originates from the Basic Input/Output System used in the CP/M operating system in 1975. The BIOS originally proprietary to the IBM PC has been reverse engineered by some companies (such as Phoenix Technologies) looking to create compatible systems. The interface of that original system serves as a de facto standard.

The BIOS in modern PCs initializes and tests the system hardware components (Power-on self-test), and loads a boot loader from a mass storage device which then initializes a kernel. In the era of DOS, the BIOS provided BIOS interrupt calls for the keyboard, display, storage, and other input/output (I/O) devices that standardized an interface to application programs and the operating system. More recent operating systems do not use the BIOS interrupt calls after startup.

Most BIOS implementations are specifically designed to work with a particular computer or motherboard model, by interfacing with various devices especially system chipset. Originally, BIOS firmware was stored in a ROM chip on the PC motherboard. In later computer systems, the BIOS contents are stored on flash memory so it can be rewritten without removing the chip from the motherboard. This allows easy, end-user updates to the BIOS firmware so new features can be added or bugs can be fixed, but it also creates a possibility for the computer to become infected with BIOS rootkits. Furthermore, a BIOS upgrade that fails could brick the motherboard. The last version of Microsoft Windows to officially support running on PCs which use legacy BIOS firmware is Windows 10 as Windows 11 requires a UEFI-compliant system.

Unified Extensible Firmware Interface (UEFI) is a successor to the legacy PC BIOS, aiming to address its technical limitations.