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

What are interacting processes, What are interacting processes? Intera...

What are interacting processes? Interacting processes: The concurrent processes executing into the operating system are cooperating or interacting processes if they can be af

What is sap dispatcher, What is SAP dispatcher? SAP dispatcher is the co...

What is SAP dispatcher? SAP dispatcher is the control agent that handles the resources for the R/3 applications.

Define constraints, Define Constraints Constraints can be defined as P...

Define Constraints Constraints can be defined as Preconditions (input values) and Post Conditions (output values). Preconditions on functions are constraints which input value

Expert systems, An expert systems is software that contains a knowledge ...

An expert systems is software that contains a knowledge base of facts and relationships and has the ability to make inferences based on that knowledge base. An experts sys

Explain the matlab working environment, This is the set of tools and facili...

This is the set of tools and facilities that you work with as the MATLAB user or programmer. It contains facilities for managing the variables in your workspace and importing and e

What the first part of the address identifies in e-mailbox, The first part ...

The first part of the address in electronic mailbox identifies? The first part of address in E-Mail identifies the user's mail box.

Hard disk technology - computer architecture, Hard Disk Technology: Fi...

Hard Disk Technology: Figure of a computer hard disk drive           HDDs record data by magnetizing ferromagnetic material directionally, to represent

Fundamental building block of main memory, Q. Fundamental building block of...

Q. Fundamental building block of main memory? The fundamental building block of main memory remains DRAM chip as it has for decades. Till recently there had been no important c

How a pointer variable declared in c, How a pointer variable declared in C ...

How a pointer variable declared in C ? Why is it sometimes desirable to pass a pointer to a function as an argument? A pointer is a variable which contains the address in memor

Project, write a programme to simulate a train station to automate

write a programme to simulate a train station to automate

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