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

Optimal number of disks , John Lindsay sells disks that have 25 software pa...

John Lindsay sells disks that have 25 software packages that show a variety of financial functions, including net present value, internal rate of return, and other financial progra

Database management system, Consider the following instance of the Students...

Consider the following instance of the Students relation, sorted by gpa. sid name login age gpa 53831 Madayan madayan@music 11 1.8 53832 Guldu guldu@music 12 2.0 53688 Smith smith

State about sixth generation electronic computers, Sixth Generation (1990 -...

Sixth Generation (1990 - ) This  generation  begun  with  many  gains  in  parallel  computing,  both  in  hardware area and in improved understanding of how to build up algori

What is software quality assuranc, Software QA includes the whole software ...

Software QA includes the whole software development PROCESS - improving and monitoring the process, making sure that any agreed-upon standards and processes are followed, and ensur

Message passing model, In the message-passing model, there exists a set of ...

In the message-passing model, there exists a set of tasks that use their own local memories during computation. Multiple tasks can reside on the similar physical machine as well ac

Illustrate the history of computers, Q. Illustrate the history of computers...

Q. Illustrate the history of computers? Let's now consider history of computers since this will give fundamental information about technological development trends in computer

Advantages and disadvantages of mealy - moore state machine, What are the a...

What are the advantages and disadvantages of Mealy and Moore state machine? Advantage and Disadvantage of Mealy and Moore state machine: In Mealy as the output variable is a

What is a formal description for a programming language, A grammar for a pr...

A grammar for a programming language is a formal description of ? Structure is a formal description for a programming language.

Explain the typical organization of a computer, Q. Explain the typical orga...

Q. Explain the typical organization of a computer? There are two principal components: hardware and software. The former refers to physical components such as memory unit (MU),

Domains of artificial intelligence, The major domains of AI research and...

The major domains of AI research and development. AI applications can be grouped under three major areas cognitive science robotics and natural interfaces though these class

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