Define strategy procedure, Computer Engineering

Assignment Help:

Q. Define Strategy Procedure?

The strategy procedure is called when loaded into memory by DOS or whenever controlled device request service. The major purpose of the strategy is to save request header and its address for use by interrupt procedure.

The request header is used by DOS to communicate commands and other information to interrupt procedure in the device driver.

The request header comprises length of the request header as its first byte. This is essentialsince the length of request header differs from command to command. The return status word communicate information back to DOS from device driver.

The initialise driver command (00H) is always executed when DOS initialises device driver. Initialisation commands pass message to video display indicating that driver is loaded into system and returns to DOS the amount of memory required by the driver. You can only use DOS INT 21H functions 00H.


Related Discussions:- Define strategy procedure

Vector processing with pipelining-vector processing, Vector Processing with...

Vector Processing with Pipelining: Since in vector processing, vector instructions perform the similar computation on dissimilar data operands repeatedly, vector processing is most

Explain about the various features present in ms access, Microsoft access h...

Microsoft access has vast advantages for a programmer and end user. Some of the advantages are ? Relative compatibility with SQL and VBA. ? Microsoft SQL server desktop engi

Explain the following the address instruction, Explain the following the ad...

Explain the following the address instruction?  Three-address instruction-it can be represented as add a,b,c Two-address instruction-it can be shown as Add a,b

Internal structure of agents - artificial intelligence, Internal Structure ...

Internal Structure of Agents: We have looked at agents in terms of their external influences and behaviors: they put in from the surroundings and perform rational actions to a

Power and energy, Ask questiPower and EnergyQuestion 4Consider a processor ...

Ask questiPower and EnergyQuestion 4Consider a processor that runs at 2.5 GHz and 1 Volt. When running a given CPU-bound program,the processor consumes 100 W, of which 20 W is leak

Important parameters for transmitting data, For this project, we hope to us...

For this project, we hope to use the basic idea of InfraRed (IR) communication for our television in ES103.  In ES103, we have a Sony large-screen television that we hope to commun

Define memory cell, Define memory cell? A memory cell is capable of sto...

Define memory cell? A memory cell is capable of storing single bit of information. It is usually organized in the form of an array

What is presentation layer, Q. What is Presentation layer? Presentatio...

Q. What is Presentation layer? Presentation layer: When two hosts are communicating with each other they might use different coding standards and character sets for represent

What is the difference between activity and sequence diagram, The following...

The following are the difference among Activity and Sequence Diagrams: A sequence diagram represents the way of processes implement in a sequence. For example, the order of op

Value - elements of composition, Value Value is the relative amount of ...

Value Value is the relative amount of light and darkness in an image or a particular colour within an image. Value is also known as Tone and refers to the way the artist has re

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