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DeviceDriver Windows NT 驱动程序类型 (转载)

王朝system·作者佚名  2006-01-08
窄屏简体版  字體: |||超大  

发信人: kingchurch (老人与海~沙漠海), 信区: Programming

标 题: [范文][DeviceDriver]Windows NT 驱动程序类型 (转载)

发信站: BBS 水木清华站 (Sun Apr 26 14:39:29 1998)

【 以下文字转载自 New_board 讨论区 】

【 原文由 linZh 所发表 】

Kinds of Drivers in Windows NT

Within the Windows NT operating system,

there are two basic kinds of drivers:

User-mode drivers, such as Win32 multimedia

drivers, VDDs for MS-DOS?nbsp;applications with application

-dedicated devices, or another protected subsystem's

drivers. User-mode drivers are subsystem-specific.

Kernel-mode drivers for logical, virtual, or

physical devices. These are called NT drivers, because

they are part of the Windows NT executive: the underlying,

"new technology" microkernel-based operating system that

supports one or more protected subsystems.

NT includes a number of kernel-mode components with

well defined functionality isolated in each component. Those

of most interest to NT device driver writers are the Kernel,

I/O Manager, Hardware Abstraction Layer (HAL), Configuration

Manager, Memory Manager, Executive Support, and Process

Structure components. Additional components of interest to

some NT driver writers include the Object Manager and Security

Reference Monitor. Also of interest to NT file system driver

writers is the Cache Manager.

Like NT itself, NT drivers are implemented as discrete,

modular components with a well defined set of required function-

ality. All NT drivers have a set of system-defined standard driver

routines and some number of internal routines as determined by

the driver writer.

There are three basic types of NT drivers. Each type has

a slightly different structure and quite different functionality:

Device drivers, such as a keyboard or disk driver that

directly controls a physical device. Device drivers are sometimes

called lowest-level drivers, particularly when such a driver is

the lowest driver in a chain of layered NT drivers.

Intermediate drivers, such as a virtual disk, mirror, or

device-type-specific class driver, that depend on support from

underlying device drivers

File system drivers (FSDs), such as the system-supplied FAT,

HPFS, NTFS, or CDFS drivers, that also depend on support from

underlying lower-level drivers. While a particular NT file system

driver might or might not get support from one or more intermediate

drivers, every NT file system driver ultimately depends on support

from one or more device drivers.

Windows NT network drivers also can be classified as one of

these types of drivers. For example, an NT server or redirector is

a specialized file system driver, a transport driver is a type of

intermediate NT driver, and a physical netcard (sometimes called a

media access controller) driver is an NT device driver. However,

NT provides specialized interfaces and support for network drivers,

such as NDIS 3.0 (Network Device Interface Specification, Version 3.0)

for drivers of physical net cards.

 
 
 
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