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

Difference between a window and a frame?, The Frame class extends Window to...

The Frame class extends Window to describe a main application window that can have a menu bar. A window can be modal.

Various phases of consumer merchantile model, What are the various phases o...

What are the various phases of consumer merchantile model and also differentiate between prepurchase interaction & post purchase interaction. There are three phase of consumer

Classical approach - canonical genetic algorithm, Classical approach - Cano...

Classical approach - Canonical genetic algorithm: However returning to the classical approach, as there example, whether solving a particular problem involved finding a set of

Existential construction - artificial intelligence, The English existential...

The English existential construction involves so-called there-sentences such as these: (1) There is a dog in the yard (2) There were no children at the party (3) There

What are the aspects of CAD, What are the aspects of CAD Increased use ...

What are the aspects of CAD Increased use of computers has led to many of the above affects. Other aspects to consider include: - deskilling of the work force (for illustra

Translate assembly language program to machine , A useful exercise in under...

A useful exercise in understanding assembly language and its relation to machine language is to take a short assembly language program and translate it to machine language by hand.

Evaluate sop expression, Q. For function F(x,y,z) = ∑m(0,1,2,6,7) using TRU...

Q. For function F(x,y,z) = ∑m(0,1,2,6,7) using TRUTH TABLE only. 1. Find SOP expression 2. Implement this simplified expression using two level AND-to-OR gate network 3. I

Explain time switching, Explain Time Switching. Time Switches: The ...

Explain Time Switching. Time Switches: The principle of a time switch is demonstrated in figure. This connects an incoming n channel PCM highway to an outgoing n channel PC

Applications of thermodynamics, Discuss the applications of thermodynamics ...

Discuss the applications of thermodynamics in field of energy technology Sol: Thermodynamics has wide applications as basis of thermal engineering. Nearly all process and engi

What is shift operation, Q. What is Shift operation? Shift: Shift ope...

Q. What is Shift operation? Shift: Shift operation is employed for transfer of bits either to left or to right. It can be used to comprehend simple arithmetic operation or da

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages