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A PBA environment serves as an extension of the BIOS, UEFI or boot firmware and guarantees a secure, tamper-proof environment external to the operating system as a trusted authentication layer. [2] The PBA prevents any operating system from loading until the user has confirmed he/she has the correct password to unlock the computer. [ 2 ]
The idea of having two different modes to operate in comes from "with more power comes more responsibility" – a program in supervisor mode is trusted never to fail, since a failure may cause the whole computer system to crash. Supervisor mode is "an execution mode on some processors which enables execution of all instructions, including ...
Version 1 of the Desktop Management BIOS (DMIBIOS) specification was produced by Phoenix Technologies in or before 1996. [5] [6] 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 ...
Chromebook tablet, introduced in March 2018 by Acer, the Chromebook Tab 10. The device was to compete with the lower-priced Apple iPad tablet in the education market. [47] [48] Chromebox, an ultra small form-factor desktop PC first introduced by Samsung in May 2012. [49] Chromebase, an all-in-one desktop PC was introduced by LG Electronics in ...
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]
Without Supervisor Mode Access Prevention, supervisor code usually has full read and write access to user-space memory mappings (or has the ability to obtain full access). This has led to the development of several security exploits, including privilege escalation exploits, which operate by causing the kernel to access user-space memory when it ...
The development of DMI, 2.0 version June 24, 1998, [1] marked the first move by the Distributed Management Task Force (DMTF) into desktop-management standards. [2] Before the introduction of DMI, no standardized source of information could provide details about components in a personal computer.
From that transition to the early 2020s transition to Apple silicon, Mac computers used the same x86 computer architecture as many other desktop PCs, laptops, and servers, meaning that in principle, the code making up macOS systems and software can be run on alternative platforms with minimal compatibility issues. [3]