Illustrate header section of a device driver, Computer Engineering

Assignment Help:

Q. Illustrate Header section of a device driver?

Header comprises information which allows DOS to identify the driver. It also comprises pointers which allow it to chain to other drivers loaded into the system.

Header section of a device driver is 18 bytes in length and comprises pointers and name of the driver.

Following structure of the header:

CHAIN DD -1    : link to next driver

ATTR DW 0    : driver attribute

STRT DW START: address of strategy

INTER DW INT: address if interrupt

DNAME DB 'MYDRIVER': driver name.

The first double word comprises a -1 which informs DOS this is the last driver in chain. If extra drivers are added DOS inserts a chain address in this double word as the segment and offset address. Chain address points to the subsequent driver in the chain. This enables additional drivers installed at any time.

The attribute word signifies the type of headers included for driver and the type of device the driver installs. It also signifies whether the driver control a character driver or a block device.


Related Discussions:- Illustrate header section of a device driver

Pulse train, brief explanation on pulse train

brief explanation on pulse train

What is the use of urgent pointer in tcp segment, What is the use of urgent...

What is the use of urgent pointer in TCP segment? For accommodation out of band signaling, TCP permits the sender to identify data as urgent, implies that the receiving program

Works flowing related technologies influence e-business, How the works do f...

How the works do flowing related technologies influence e-business? Work Flow related Technologies influence e-business: Microsoft CRM automates internal business process

Classify scheduler, Classify Scheduler. Scheduler is a kernel function ...

Classify Scheduler. Scheduler is a kernel function decide which method  be  thought to be implemented by the processor: the scheduler scans the list of processes in the ready s

Scientific knowledge, Scientific knowledge: This is not to be confused...

Scientific knowledge: This is not to be confused with the applications of "AI" programs to other sciences, discussed later. Its subfields can be classified into a variety of t

Bootstrap, The device is packaged in a 80 pin PLCC device as shown.The main...

The device is packaged in a 80 pin PLCC device as shown.The main groupings of the pins are as follows Port A PA0 - PA7 Parallel Port or Timer Port B PB0 - PB7 Parallel Port or High

What are advantages and drawbacks of latches, What are advantages and drawb...

What are advantages and drawbacks of latches? Advantages and drawbacks of latches: Area of a latch is classically less than a Flip Flop. It consumes less power, becaus

Describe the graphic accelerators, Q. Describe the Graphic Accelerators? ...

Q. Describe the Graphic Accelerators? A Graphic Accelerator is actually a chip as a matter of fact most significant chip in your video card. The Graphic Accelerator is essentia

Design combinational-sequential electronic logic gate, Combinational/Sequen...

Combinational/Sequential Logic design with Integrated Circuits (Dual in line package) Car wash concept with the following steps in a Combinational Logic Diagram: 1.    Start

Html, discuss hypertext mark up language

discuss hypertext mark up language

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd