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It is roughly analogous to the BIOS on the IBM PC platform. Its source code is available as open source from Broadcom. Common embedded system alternatives include Das U-Boot. Its main responsibility is to initialize CPUs, caches, memory controllers, and peripherals required early on in the power on stage.
Although Asus' factory default firmware is generally more feature-rich than its competitors, [citation needed] Open source Linux-based router firmware projects such as DD-WRT, [1] OpenWrt, [2] Tomato Firmware [3] and DebWRT [4] are able to get better performance out of the devices and offer their users more flexibility and customization options.
When interrupt 19h is called, the BIOS attempts to locate boot loader software on a "boot device", such as a hard disk, a floppy disk, CD, or DVD. It loads and executes the first boot software it finds, giving it control of the PC. [28] The BIOS uses the boot devices set in Nonvolatile BIOS memory , or, in the earliest PCs, DIP switches.
Unlike 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. Intel developed the original Extensible Firmware Interface ( EFI ) specification.
Firmware hacks usually take advantage of the firmware update facility on many devices to install or run themselves. Some, however, must resort to exploits to run, because the manufacturer has attempted to lock the hardware to stop it from running unlicensed code. Most firmware hacks are free software.
American Megatrends International, LLC, doing business as AMI, is an international hardware and software company, specializing in PC hardware and firmware. [3] The company was founded in 1985 by Pat Sarma and Subramonian Shankar. [4]
coreboot, formerly known as LinuxBIOS, [5] is a software project aimed at replacing proprietary firmware (BIOS or UEFI) found in most computers with a lightweight firmware designed to perform only the minimum number of tasks necessary to load and run a modern 32-bit or 64-bit operating system.
fwupd is an open-source daemon for managing the installation of firmware updates on Linux-based systems, developed by GNOME maintainer Richard Hughes. [1] It is designed primarily for servicing the Unified Extensible Firmware Interface (UEFI) firmware on supported devices via EFI System Resource Table (ESRT) and UEFI Capsule, which is supported in Linux kernel 4.2 and later.