How can we write an interrupt servicing routine, Computer Engineering

Assignment Help:

Q. How can we write an Interrupt Servicing Routine?

The following are the fundamentalthough rigid sequence of steps:

1. Save the system context (flags,registers etc. which will be modified by the ISR).

2. Disable the interrupts which may cause interference if allowed to take place during this ISR's processing

3. Enable those interrupts which may still be allowed to occur during this ISR processing.

4. Determine cause of the interrupt.

5. Take the suitable action for the interrupt like - receive and store data from serial port, set a flag to specify the completion of the disk sector transfer etc.

6. Restore the system context.

7. Re-enable any interrupt levels which were blocked during this ISR execution.

8. Resume execution of the process which was interrupted on occurrence of the interrupt.

MS-DOS offers you facilities which enable you to install well-behaved interrupt handlers such that they won't interfere with the operating system function or other interrupt handlers. These functions are:

1676_How can we write an Interrupt Servicing Routine.png

Related Discussions:- How can we write an interrupt servicing routine

Discuss the csma/cd and csma/ca protocols, Discuss the CSMA/CD and CSMA/CA ...

Discuss the CSMA/CD and CSMA/CA protocols. CSMA/CD: this is an access method used mainly with LANs configured in a bus topology. Along with CSMA/CD, any station (node) can se

Internet programming, Futoshiki is a game played on an N by N (usually 5 by...

Futoshiki is a game played on an N by N (usually 5 by 5) grid and uses the symbols 1 .. N. The objective of the game is to place each symbol on the grid so that it only occurs once

Determine about the virtual private networks, Virtual Private Networks (VPN...

Virtual Private Networks (VPN) In order to encrypt/decrypt all the communication network traffic that passes through the Internet or Intranet, a VPN uses software or hardware.

What is the draw back of micro programmed control, What is the draw back of...

What is the draw back of micro programmed control? It leads to a slower operating speed because of the time it takes to fetch microinstructions from the control store.

Determine the abstraction mechanisms for modelling, Determine the abstracti...

Determine the abstraction mechanisms for modelling The object orientation conceptual structure helps in providing abstraction mechanisms for modelling, that includes: Cl

Briefly define the term isotype, Question: (a) (i) Briefly define the t...

Question: (a) (i) Briefly define the term "Isotype". (ii) With the help of diagrams, describe the rules of "Isotype". (b) Elaborate on your understanding of internationa

Determine the negation of the statement, Determine the negation of the stat...

Determine the negation of the statement? "2 is even and -3 is negative"? Answer: 2 is odd or -3 is not negative.

What is the main use of structures, What is The main use of structures ...

What is The main use of structures The main use of structures is to lump together collections of disparate variable types, so they can conveniently be treated as a unit. For ex

Programming with loops and comparisons, Q. Programming with loops and compa...

Q. Programming with loops and comparisons? This segment deals with more practical illustrations employing comparison, loops and shift instructions. Simple Program Loops

Advantages and disadvantages of structured analysis, Advantages and Disadva...

Advantages and Disadvantages of Structured Analysis With time, you will find out that most customers understand structured methods better than object oriented (OO) methods. As

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages