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

How does multiplexer know which line to select, How does multiplexer know w...

How does multiplexer know which line to select? This is managed by select lines. The select lines provide communication among different components of a computer. Now let's see

Presentation of the report, This will be based on presentation of the repor...

This will be based on presentation of the report, complexity of the task, degree of completion and uniqueness of your problem. As a part of this question, you should also inclu

State about the object oriented analysis design, State about the Object ori...

State about the Object oriented analysis design Object oriented analysis design (OOAD) is a bottom up approach which supports viewing system as a set of components (objects) w

How free-space is managed using bit vector implementation, How free-space i...

How free-space is managed using bit vector implementation? The free-space list is executed as a bit map or bit vector. Each block is shown by 1 bit. If the block is free, the b

Write a program to find 2''s complement of a binary number, Q. Write a pro...

Q. Write a program to find 1's and 2's complement of a Binary number. Perform necessary checking that if entered number is not a valid number, ask user to enter valid Binary n

Connection machine fortran, Q. Connection Machine FORTRAN? Connection M...

Q. Connection Machine FORTRAN? Connection Machine Fortran was a subsequent SIMD language developed by Thinking Machines Corporation. Connection Machine Fortran incorporated all

What is dynamic random access memory, Q. What is Dynamic Random Access Memo...

Q. What is Dynamic Random Access Memory? RAM technology is divided into 2 technologies: Static and dynamic. A dynamic RAM (DRAM) is made with cells which store data as charge o

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

Define parallel programming, Conventionally software has been written for s...

Conventionally software has been written for serial computation in that programs are written for computers which have a single Central Processing Unit (CPU). Here the problems are

Vertical alignment of fields one below the other, Which Command permits for...

Which Command permits for vertical alignment of fields one below the other. UNDER Command is used ofr vertical alignment.

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages