Tiano has since then been superseded by EDK and EDK2 and is now maintained by the TianoCore community. The first open source UEFI implementation, Tiano, was released by Intel in 2004. It was later renamed to Extensible Firmware Interface (EFI). The effort to address these concerns began in 1998 and was initially called Intel Boot Initiative. BIOS limitations (such as 16-bit real mode, 1MB addressable memory space, assembly language programming, and PC AT hardware) had become too restrictive for the larger server platforms Itanium was targeting. The original motivation for EFI came during early development of the first Intel–HP Itanium systems in the mid-1990s. UEFI is independent of platform and programming language, but C is used for the reference implementation TianoCore EDKII.Ĭontrary to its predecessor BIOS which is a de facto standard originally created by IBM as proprietary software, UEFI is an open standard maintained by an industry consortium. In 2005, UEFI deprecated EFI 1.10 (the final release of EFI). Some of the EFI's practices and data formats mirror those of Microsoft Windows. Intel developed the original Extensible Firmware Interface ( EFI) specification. UEFI replaces the BIOS which was present in the boot ROM of all personal computers that are IBM PC compatible, although it can provide backwards compatibility with the BIOS using CSM booting. Examples of firmware that implement the specification are AMI Aptio, Phoenix SecureCore, TianoCore EDK II, InsydeH2O.
Unified Extensible Firmware Interface ( UEFI, / ˈ uː ɪ f aɪ/ or as acronym) is a specification that defines the architecture of the platform firmware used for booting and its interface for interaction with the operating system. They can use different I/O protocols, but SPI is the most common. The UEFI implementation is usually stored on a NOR-based EEPROM that is located on the mainboard.
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