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.

Posted Date: 8/1/2013 3:59:17 AM | Location : United States

Ask an Expert

Related Discussions:- Define strategy procedure, Assignment Help, Ask Question on Define strategy procedure, Get Answer, Expert's Help, Define strategy procedure Discussions

Write discussion on Define strategy procedure
Your posts are moderated

Write your message here..

Related Questions

Time complexity, Take a look at the code and try to understand the logic, p... Take a look at the code and try to understand the logic, particularly, the way scrambled words are disambiguated, i.e.., whether they are matched successfully against a correct wor

Effectiveness - efficiency - safety and utility of site, Based on your unde... Based on your understanding of Unit 2, compile a set of five usability and/or user experience goals which you think will be useful in evaluating the two sites when gathering the in

Determine about the security- accidental damage, Determine about the securi... Determine about the security- accidental damage accidental damage is best guarded against by keeping back up files or use Grandfather-Father-Son (GFS) method; also use of passw

State the Process of sending signals to televisions, Determine about the Si... Determine about the Signals to televisions Signals to televisions are now sent digitally thus need a computer to interpret as well as decode these signals into a sound/picture;

Observations of high level language program, Q. Observations of High Level ... Q. Observations of High Level Language Program? Observations Integer constants appeared nearly as frequently as structures or arrays. Most of the scalars were foun

User compatibility & appropriateness of inputs and outputs, User Compatibil... User Compatibility & Appropriateness of Inputs and Outputs User compatibility - this is the degree to which the machine works towards task completion in way that suits the u

Determine the importance of computer hardware, Determine the importance of ... Determine the importance of computer Hardware Hardware forms the greatest asset of the company, but it reaches obsolescence very quickly. Normally, it is said that every six mo

Defined for a push button fields in the screen attributes, What is to be de... What is to be defined for a push button fields in the screen attributes? A function code has to be described in the screen attributes for the push buttons in a screen.

Add the equation by using 2's compliment, Add 20 and (-15) using 2's comple... Add 20 and (-15) using 2's complement ? Ans. Addition of 20 and (-15) by using 2's complement as (20) 10 = 1 0 1 0 0                                                  (16

Explain data parallel programming, Q. Explain Data Parallel Programming? ... Q. Explain Data Parallel Programming? In data parallel programming model major focus is on performing concurrent operations on a data set. The data set is characteristically or