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Class 2: UEFI with CSM and external UEFI interfaces, eg. UEFI Boot. Class 3: UEFI without a CSM interface and with an external UEFI interface. Class 3+: UEFI class 3 that has Secure Boot enabled. [97] Starting from the 10th Gen Intel Core, Intel no longer provides Legacy Video BIOS for the iGPU (Intel Graphics Technology). Legacy boot with ...
On Apple Mac computers using Intel x86-64 processor architecture, the EFI system partition is initially left blank and unused for booting into macOS. [13] [14]However, the EFI system partition is used as a staging area for firmware updates [15] and for the Microsoft Windows bootloader for Mac computers configured to boot into a Windows partition using Boot Camp.
The BIOS Boot Specification (BBS) was developed by a consortium comprising Compaq, Intel and Phoenix Technologies to standardize the initialization sequence of Plug and Play (PnP) BIOS and Option ROMs. [3] This standard is supported by most post-2000 BIOSes. The standard presents the notion of a Boot Connection Vector (BCV) table and BCV ...
In the late 1990s, Intel developed a new partition table format as part of what eventually became the Unified Extensible Firmware Interface (UEFI). The GUID Partition Table is specified in chapter 5 of the UEFI 2.11 specification. [2]: 111 GPT uses 64 bits for logical block addresses, allowing a maximum disk size of 2 64 sectors.
Despite this apparent lack of completeness Intel has recently decided to widely support PXE within the new UEFI specification extending the PXE functionality to all EFI/UEFI environments. Current Unified Extensible Firmware Interface Specification 2.4A, Section 21 Network Protocols — SNP, PXE, and BIS defines the protocols that provide access ...
The UEFI was developed by Intel, originally for Itanium-based machines, and later also used as an alternative to the BIOS in x86-based machines, including Apple Macs using Intel processors. Unix workstations originally had vendor-specific ROM-based firmware.
TianoCore EDK II (formerly Tiano) is the reference implementation of UEFI by Intel. EDK is the abbreviation for EFI Development Kit and is developed by the TianoCore community. [ 1 ] TianoCore EDK II is the de facto standard generic UEFI services implementation.
Also, Windows 11 requires UEFI to boot, [87] with the exception of IoT Enterprise editions of Windows 11. [10] UEFI is required for devices shipping with Windows 8 [ 88 ] [ 89 ] and above. Other alternatives to the functionality of the "Legacy BIOS" in the x86 world include coreboot and libreboot .