In computing, BIOS (/ˈbaɪɒs, -oʊs/, BY-oss, -ohss; an acronym for Basic Input/Output System and also known as the System BIOS, ROM BIOS or PC BIOS) is firmware used to perform hardware initialization during the booting process (power-on startup), and to provide runtime services for operating systems and programs. The BIOS firmware comes pre-installed on a personal computer's system board, and it is the first software to run when powered on. 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, and loads a boot loader from a mass memory device which then initializes an operating system. In the era of DOS, the BIOS provided BIOS interrupt calls for the keyboard, display, 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 that make up the complementary system chipset. Originally, BIOS firmware was stored in a ROM chip on the PC motherboard. In modern 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 may brick the motherboard.
Unified Extensible Firmware Interface (UEFI) is a successor to the legacy PC BIOS, aiming to address its technical limitations.
SMBIOS DMI Entry and Pull methods
Within Linux you will use these commands for getting information.
Displays the system manufacturer
dmidecode -s system-manufacturer
Displays the chassis manufacturer
dmidecode -s chassis-manufacturer
Displays the systems product name
dmidecode -s system-product-name
Displays the system version
dmidecode -s system-version
Displays the chassis version
dmidecode -s chassis version
Displays the system UUID number
dmidecode -s system-uuid
Displays the system serial number
dmidecode -s system-serial-number
Displays the chassis serial number (Printed on Bottom)
dmidecode -s chassis-serial-number
Displays the chassis asset tag assigned to it.
dmidecode -s chassis-asset-tag
Displays the chassis SKU assigned
dmidecode -s chassis-sku
Within Windows you will use these commands for getting information
Run these commands using powershell or cmd
Displays the Manufacturer set in the DMI Table
wmic baseboard get manufacturer
Displays the Model set in the DMI Table
wmic baseboard get model
Displays the Name set in the DMI Table
wmic baseboard get name
Displays the Product Name set in the DMI Table
wmic baseboard get product
Displays the SKU number set in the DMI Table
wmic baseboard get SKU
Displays the serial number set in the DMI Table
wmic baseboard get serialnumber
Displays the Asset Tag set in the DMI Table
wmic baseboard get tag
Displays the version set in the DMI Table
wmic bios get version
Display all information at once for the baseboard is “wmic baseboard” Display all information at once for BIOS is “wmic bios” Can display extra information with “wmic csproduct” SMI BIOS export for Computer System