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

Write a ''c'' functions to arrange the elements of an integer , Write a 'C'...

Write a 'C' functions to arrange the elements of an integer array in such a way that all the negative elements are before the positive elements. The array is passed to it as an arg

Explain public switched telephone network, Explain Public Switched Telephon...

Explain Public Switched Telephone Network. PSTN (Public Switched Telephone Network): This is Public Switched Telephone Network (PSTN), which accommodates two types of subscri

Give examples of different parameter-passing mechanisms, Explain different ...

Explain different parameter passing mechanisms to a function with the help of example? The different parameter-passing mechanisms are given below: 1. Call by value 2.

Illustrate the term EDI trading patterns, Illustrate the term EDI Trading P...

Illustrate the term EDI Trading Patterns? EDI Trading Patterns are illustrated below: a. Hubs and Spokes: Several of the prime movers into the adoption of Electronic Da

The goal of hashing, The goal of hashing is to produce a search that takes ...

The goal of hashing is to produce a search that takes O(1) time

Explain the biometric systems and biometric authentication, Explain the Bio...

Explain the Biometric Systems in brief. Biometrics: It is the science of measuring physical properties of living beings. Biometric Authentication: (a) This authenticati

Explain about integration levels, Q. Explain about Integration Levels? ...

Q. Explain about Integration Levels? Initially only few gates were integrated consistently on a chip. This initial integration was termed as small-scale integration (SSI). With

What are the uses of interactive reporting, What are the uses of interactiv...

What are the uses of interactive reporting? The user can actively control data retrieval and show during the session. Instead of an extensive and detailed list, you make a ba

Define micro operation, Define Micro operation. The operations implemen...

Define Micro operation. The operations implemented on data stored in the registers are called Micro operation. A microperation is an elementary operation performed on the infor

What are difference between latches and flipflops, What are difference betw...

What are difference between latches and flipflops? Difference : Latches are level-sensitive, while, flipflops is edge sensitive. It means to say edge sensitive that O/p change

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages