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

Data transmission and modems, Q. What is Data Transmission and Modems? ...

Q. What is Data Transmission and Modems? Data can be transferred between two stations in either serial or parallel transmission. Parallel data transmission, in which a group of

By which many computers are connected in geographical area, A large numbers...

A large numbers of computers in a wide geographical area can be efficiently connected using? A large numbers of computers in a broad geographical area can be efficiently linked

What are the types of electronic payment system, What are the types of elec...

What are the types of electronic payment system? Types of the electronic payment system are as given below: The most Internet payment way for Business to Customer is credit

What do you mean by instruction cycle, Q. What do you mean by instruction c...

Q. What do you mean by instruction cycle? We have considered the instruction execution in previous section. Now let's consider more about different types of instruction executi

Explain r-2r ladder d/a converter, Explain R-2R ladder D/A converter. A...

Explain R-2R ladder D/A converter. Ans. R-2R ladder D/A converter: An R-2R ladder D/A converter is shown in Fig.(a). It uses resistors of only two values R and 2R. The inp

A sorting algorithm is stable, A sorting algorithm is stable if  Preser...

A sorting algorithm is stable if  Preserves the original order of records with equivalent keys.

Describe all elements of a state-chart diagram, a. Initial State: The first...

a. Initial State: The first or the default state the object is in. It is indicated by a solid circle. b. State: All the states an object can go in are mentioned in this. It is

Explain the synchronous-transmission, A control character is sent at the be...

A control character is sent at the beginning as well as at the end of every block in the synchronous-transmission in order to  (A) Synchronize the clock of transmitter and rece

Ruby, Discuss about variables and assignmesnt statements

Discuss about variables and assignmesnt statements

How does tcp achieve reliability, How does TCP achieve reliability? One...

How does TCP achieve reliability? One of the most significant technologies is retransmission. While TCP stands data the sender compensates for packet loss through implementing

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