Hardware Abstraction Layer - Definition. Was ist Hardware Abstraction Layer
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Was (wer) ist Hardware Abstraction Layer - definition

SET OF SOFTWARE ROUTINES THAT EMULATE PLATFORM-SPECIFIC DETAILS, GIVING PROGRAMS DIRECT ACCESS TO HARDWARE RESOURCES IN A DEVICE-INDEPENDENT, HIGH PERFORMANCE MANNER
Hardware abstraction layer; Hardware Abstraction Layer; Hardware Abstraction layer; Hardware-abstraction layer

Hardware Abstraction Layer         
<operating system> (HAL) The layer of Microsoft Windows NT where they have isolated their assembly language code. (1995-04-17)
Hardware abstraction         
Hardware abstractions are sets of routines in software that provide programs with access to hardware resources through programming interfaces. The programming interface allows all devices in a particular class C of hardware devices to be accessed through identical interfaces even though C may contain different subclasses of devices that each provide a different hardware interface.
Abstraction layer         
WAY OF HIDING DETAILS OF A COMPUTING SUBSYSTEM, ALLOWING SEPARATION OF CONCERNS AND INTEROPERABILITY
Abstract interface; Layer (abstraction); Abstraction level; Layer of abstraction; Architectural layer; Layers of abstraction; I/O abstraction; Layer (software)
In computing, an abstraction layer or abstraction level is a way of hiding the working details of a subsystem. Examples of software models that use layers of abstraction include the OSI model for network protocols, OpenGL, and other graphics libraries, which allow the separation of concerns to facilitate interoperability and platform independence.

Wikipedia

Hardware abstraction

Hardware abstractions are sets of routines in software that provide programs with access to hardware resources through programming interfaces. The programming interface allows all devices in a particular class C of hardware devices to be accessed through identical interfaces even though C may contain different subclasses of devices that each provide a different hardware interface.

Hardware abstractions often allow programmers to write device-independent, high performance applications by providing standard operating system (OS) calls to hardware. The process of abstracting pieces of hardware is often done from the perspective of a CPU. Each type of CPU has a specific instruction set architecture or ISA. The ISA represents the primitive operations of the machine that are available for use by assembly programmers and compiler writers. One of the main functions of a compiler is to allow a programmer to write an algorithm in a high-level language without having to care about CPU-specific instructions. Then it is the job of the compiler to generate a CPU-specific executable. The same type of abstraction is made in operating systems, but OS APIs now represent the primitive operations of the machine, rather than an ISA. This allows a programmer to use OS-level operations (e.g. task creation/deletion) in their programs while retaining portability over a variety of different platforms.