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 is a priority interrupt, What is a Priority Interrupt? A priority ...

What is a Priority Interrupt? A priority interrupt is an interrupt that establishes a priority over the various sources to determine which condition is to be serviced first whe

Algorithm, i need algorithm for padovan string

i need algorithm for padovan string

Explain the working of linker, Explain the Working of Linker? Linker a...

Explain the Working of Linker? Linker as well called as link editor and binder. A linker is the program that combines object modules to form an executable program. Several pro

Explain intermediate representation, a. Explain Intermediate Representation...

a. Explain Intermediate Representation? What are the desirable properties of Intermediate Representation? b. Explain Grammar of a language. Identify the dissimilar classes of gr

Explain optimal page replacement algorithm, Optimal Page Replacement Algori...

Optimal Page Replacement Algorithm The optimal page replacement algorithm that as well known as OPT is an algorithm which works as follows: while a page needs to be swapped in,

What is sensitivity list, What is sensitivity list? A list of signals w...

What is sensitivity list? A list of signals which trigger execution of the block when they change value. Sensitivity list  indicates that when a change occurs to any one of

Using which ARQ, Using               ARQ, a sending modem must wait for a ...

Using               ARQ, a sending modem must wait for a return ACK for each sent block before sending the next block. (A)  discrete                                      (B)

Define von neumann architecture, Von Neumann architecture was first majoran...

Von Neumann architecture was first majoranticipated structure for general-purpose computer. However before consideringmain components of von Neumann architecture let us first elabo

Stata about the magnetic stripes, Stata about the Magnetic stripes  Th...

Stata about the Magnetic stripes  These comprise information/data stored on magnetic material often on the back of a credit/debit card; the information is automatically read b

We declare a table control in the abap/4 program, How can we declare a tabl...

How can we declare a table control in the ABAP/4 program? Using the syntax controls type tableview using screen .

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