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A hardware abstraction layer (HAL) is an abstraction layer, implemented in software, between the physical hardware of a computer and the software that runs on that computer. . Its function is to hide differences in hardware from most of the operating system kernel, so that most of the kernel-mode code does not need to be changed to run on systems with different hardwa
HAL (Hardware Abstraction Layer or rather Hardware Annotation Library) is a software subsystem for UNIX-like operating systems providing hardware abstraction. HAL is now deprecated on most Linux distributions and on FreeBSD. Functionality is being merged into udev on Linux as of 2008–2010 and devd on FreeBSD.
The Windows installation procedure determines which ones are appropriate for the current platform and copies it to the hard drive, renaming it to hal.dll if necessary. Among the criteria for this selection are: the presence of an ACPI -compatible BIOS, the presence of an APIC , and whether or not multiple processors are present and enabled.
Ports may be separated with commas to turn off more than one port. (Note: In earlier versions of Windows, including Windows NT 4.0, this switch was named /NOSERIALMICE.) [7] /HAL=filename – Defines the Hardware Abstraction Layer that is loaded at startup. This switch is useful to try out a different HAL before you rename the file to HAL.DLL ...
Kernel mode in Windows NT has full access to the hardware and system resources of the computer. The Windows NT kernel is a hybrid kernel; the architecture comprises a simple kernel, hardware abstraction layer (HAL), drivers, and a range of services (collectively named Executive), which all exist in kernel mode. [1]
Hardware abstraction layer extension – RTX / RTX64 relies on a Windows hardware abstraction layer (HAL) extension to initialize the RTX-dedicated processors and to provide the real-time subsystem (RTSS) with high resolution timers (up to 1 microsecond).
Adeos (Adaptive Domain Environment for Operating Systems) is a nanokernel hardware abstraction layer , or hypervisor, that operates between computer hardware and the operating system (OS) that runs on it. [1] [2] It is distinct from other nanokernels in that it is not only a low level layer for an outer kernel.
Windows NT versions 3.5, 3.51 and 4.0 were certified as compliant with FIPS 151-2. The runtime environment of the subsystem is provided by two files: psxss.exe and psxdll.dll . A POSIX application uses psxdll.dll to communicate with the subsystem while communicating with posix.exe to provide display capabilities on the Windows desktop.