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

Parallelism conditions, Parallelism Conditions As discussed earlier, pa...

Parallelism Conditions As discussed earlier, parallel computing needs that the segments to be implemented in parallel must be free of each other. Thus, before implementing para

Explain b2c -business to consumer, B2C -Business to Consumer  This is w...

B2C -Business to Consumer  This is where the consumer admittance the system of the supplier. It is still a two-way function but is usually complete solely by the Internet.

What is a compiler, What is a compiler? A Compiler is a program that ac...

What is a compiler? A Compiler is a program that accepts a program written in a high level language and creates an object program.

How to working in dreamweaver, Q. How to Working in Dreamweaver? Let's ...

Q. How to Working in Dreamweaver? Let's now start our journey into the realm of Dreamweaver. We begin with typing in a few test lines in Design view. See that how our work area

Assignment, what are the different techniques of biasing a transistor?

what are the different techniques of biasing a transistor?

State the advantages of CMOS, State the advantages of CMOS. Ans. Su...

State the advantages of CMOS. Ans. Subsequent are the advantages of CMOS: Both n-channel and p-channel devices are fabricated on similar substrate. Low power di

Discuss various enhanced services of stored program control, Discuss the va...

Discuss the various enhanced services that can be made available to the subscribers because of stored program control. One of the instant benefits of stored program control is

What are sections, Layout pages, can describe sections, which can then be o...

Layout pages, can describe sections, which can then be overridden by particular views making use of the layout. Major and overriding sections is optional.

Er diagrams, how can I draw er diagram for sell & storage section of a drug...

how can I draw er diagram for sell & storage section of a drugstore?

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