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

Explain the generic framework for electronic commerce, Explain the generic ...

Explain the generic framework for electronic commerce along with suitable diagram? Generic Framework for electronic commerce comprises the Applications of EC (as like banking,

Interpreter, difference between pure and impute inter preter

difference between pure and impute inter preter

Number of addresses in an instruction, Generally the Instruction Set Archit...

Generally the Instruction Set Architecture (ISA) of a processor can be distinguished using five categories:  Operand Storage in the CPU - Where are the operands kept other t

Fundamental types of flash memory, Q. Fundamental types of flash memory? ...

Q. Fundamental types of flash memory? Code Storage Flash which is made by Intel, AMD, Atmel. It stores programming algorithms and it is largely found in cell phones. Data

Working of read-only memory, Q. Working of Read-Only Memory? A ROM is f...

Q. Working of Read-Only Memory? A ROM is fundamentally a memory or storage device in which a fixed set of binary information is stored. A block diagram of ROM is as displayed i

C programming, There is a pebble merchant. He sells the pebbles, that are u...

There is a pebble merchant. He sells the pebbles, that are used for shining the floor. His main duty is to take the length of the room’s sides. But he sometimes mistakes doing that

Explain the working of a binary counter, In binary counter the flip flop of...

In binary counter the flip flop of lowest order position is complemented with each pulse. This means that JK input position must be maintained with logic one

Pipe, Your shell should accept and execute the pipe "|"  operator. This wil...

Your shell should accept and execute the pipe "|"  operator. This will look like the following: | The functionality of this operator is to execute command1 and send i

Data can be moved using a ''write:'' statement, Data can be moved from one ...

Data can be moved from one field to another using a 'Write:' Statement and stored in the desired format.  Write: Date_1 to Date_2 format DD/MM/YY.

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