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

Qualitative independent variable, Let Consider a multiple regression model ...

Let Consider a multiple regression model for a response y, with one quantitative idividually variable x1, and one qualitative variable at three levels. a)    Write a first-order m

Two layer artificial neural networks, Two Layer Artificial Neural Networks:...

Two Layer Artificial Neural Networks: However decision trees are whenever powerful they are as a simple representation scheme. Whereas graphical on the surface that they can b

What is a linked list, What is a linked list? Linked list: A linked l...

What is a linked list? Linked list: A linked list is a self referential structure which having a member field that point to the similar structure type. In simple term, a link

Observed speedup and parallel overhead, Observed Speedup Observed speed...

Observed Speedup Observed speedup of a system which has been parallelized, is defined as:                             Granularity is one of the easiest and most extensi

Evaluate - 48 - 23 by using the 2's complement method, Perform the - 48 - 2...

Perform the - 48 - 23 operations using the 2's complement method. Ans. - 48 - 23 = - 48 + (-23)     -48     =  1 1 0 1 0 0 0 0     -23     =  1 1 1 0 1 0 0 1       = -71

Feature of micro-instruction execution, Q. Feature of micro-instruction exe...

Q. Feature of micro-instruction execution? Feature of micro-instruction execution is micro-instruction sequencing which involves address calculation of next micro-instruction.

Version control systems, The next major set of tasks to tackle are delete a...

The next major set of tasks to tackle are delete and update. Version control systems typically version updates to a ?le and only store the differences between the ?les. Two system

What is debate - architecture, What is Debate Debate took place in the ...

What is Debate Debate took place in the 1980s and first half of the 1990s. It was resolved as RISC the winner since it allows more efficient pipelining, results in simpler hard

Give explanation of common channel signalling, Explain Common channel signa...

Explain Common channel signalling. Common channel signalling: Signaling systems connection the variety of transmission systems, switching systems and subscriber equipments, i

What are the data types of the abap/4 layer, What are the Data types of the...

What are the Data types of the ABAP/4 layer? Possible ABAP/4 data types: C: Character. D: Date, format YYYYMMDD. F: Floating-point number in DOUBLE PRECISION (8 bytes)

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