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- DOCUMENT:Q99588 24-SEP-1993 [W_NT]
- TITLE :Windows NT Hardware Abstraction Layer (HAL)
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- ----------------------------------------------------------------------
-
- Summary:
-
- The Windows NT hardware abstraction layer (HAL) refers to a layer of
- software that deals directly with your computer hardware. Because the
- HAL operates at a level between the hardware and the Windows NT
- executive services, applications and device drivers need not be aware
- of any hardware-specific information. The HAL provides routines that
- enable a single device driver to support a device on different
- hardware platforms, making device driver development much easier. It
- hides hardware dependent details such as I/O interfaces, interrupt
- controllers, and multiprocessor communication mechanisms. Applications
- and device drivers are no longer allowed to deal with hardware
- directly and must make calls to HAL routines to determine hardware
- specific information. Thus, through the filter provided by the HAL,
- different hardware configurations can be accessed in the same manner.
-
- Reference(s):
-
- Microsoft Windows NT "Resource Guide"
-
- "Inside Windows NT," Helen Custer, Microsoft Press, 1993
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: HRDWR
-
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-
- Copyright Microsoft Corporation 1993.