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

Example of assembly program, Sample Program In this program we only dis...

Sample Program In this program we only display: Line                             Offset Numbers                          -----------------Source Code-----------------

Experiment with neural network, Assignment 3.b: Experiment with Neural Netw...

Assignment 3.b: Experiment with Neural Network Background: In this assignment, you will experiment with neural network for solving different types of practical problems. Y

Define peripheral, Define peripheral. Devices that are under the direct...

Define peripheral. Devices that are under the direct control of computer are said to be linked online. These devices are intended to read information into or out of the memory

Slot machine, A special Slot Machine is introduced in a new casino; this ma...

A special Slot Machine is introduced in a new casino; this machine has a digital interface of a 3X3 grid. An interface button named as SPIN for making the machine spin. There are f

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

What is sap luw or update transaction, What is SAP LUW or Update Transactio...

What is SAP LUW or Update Transaction? Update transaction (or "SAP LUW") This is a set of updates terminated by an ABAP/4 commit.  A SAP LUW may last much longer than a data

Dbms, documentation for dbms report

documentation for dbms report

Provide constructors, For this assignment, fill out the following class:   ...

For this assignment, fill out the following class:   class person { private:   string firstName;   string lastName;   int weight; public:   . . . }; You should provide cons

Explain chomsky classification of languages, Explain chomsky classification...

Explain chomsky classification of languages with suitable examples Ans: Any language is appropriate for communication provided the syntax & semantic of the language is termed t

Feasebility study, what are the feasibility study of online result manageme...

what are the feasibility study of online result management system?

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