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Flashrom is a software utility published under an open source license that can detect, read, verify, erase, or write EEPROMs using interfaces such as the Low Pin Count (LPC), FWH, parallel, and Serial Peripheral Interface (SPI). It can be used to flash firmware images such as BIOS or coreboot, or to backup existing firmware.
Features include the ability to view the flash regions and to extract and import them. [3] UEFITool allows the user to search for hex and text patterns. [4] UEFITool presents UEFI firmware images in a tree-like structure. It highlights the modules which are protected by the Intel Boot Guard. [4]
In computing, BIOS (/ ˈ b aɪ ɒ s,-oʊ s /, BY-oss, -ohss; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is a type of firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). [1]
Phoenix Technologies Ltd. is an American company that designs, develops and supports core system software for personal computers and other computing devices. The company's products – commonly referred to as BIOS (Basic Input/Output System) or firmware – support and enable the compatibility, connectivity, security and management of the various components and technologies used in such devices.
Standard PC BIOS is limited to a 16-bit processor mode and 1 MB of addressable memory space, resulting from the design based on the IBM 5150 that used a 16-bit Intel 8088 processor. [8] [34] In comparison, the processor mode in a UEFI environment can be either 32-bit (IA-32, AArch32) or 64-bit (x86-64, Itanium, and AArch64).
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.
Award BIOS in an Atmel AT29C010A PLCC flash memory. AwardBIOS: It is a BIOS developed by Award Software, and later Phoenix Technologies. Note: Later revisions of AwardBIOS still attribute copyright to Award Software Inc. instead of Phoenix Technologies Ltd., even well after the merger was completed in 1998. This also applies to UEFI firmwares. [11]
Version 2.0 of the Desktop Management BIOS specification was released on March 6, 1996 by American Megatrends (AMI), Award Software, Dell, Intel, Phoenix Technologies, and SystemSoft Corporation. It introduced 16-bit plug-and-play functions used to access the structures from Windows 95. [7]