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

Explain the multiple bus organization structure, Explain the multiple bus o...

Explain the multiple bus organization structure with neat diagram. The multiple bus organization is using more buses instead of one bus to decrease the number of steps needed an

Explain 16-bit ROM array, Draw the logic diagram of 16-bit ROM Array and ex...

Draw the logic diagram of 16-bit ROM Array and explain its principle of operation. Ans: 16-bit ROM Array: A ROM that is read-only memory is an array of selectively closed

Single bus structures, Single BUS STRUCTURES : The Bus structure and ...

Single BUS STRUCTURES : The Bus structure and multiple bus structures are kinds of bus or computing. A bus is fundamentally a subsystem which transfers data amongst the compo

Calculate the switching elements in a two stage network, In a two stage ne...

In a two stage network there are 512 inlets and outlets, r=s=24. If the probability that a given inlet is active is 0.8, calculate: the switching elements Given: N =M =512,

Explain virtual memory, In a memory hierarchy system, data and programs are...

In a memory hierarchy system, data and programs are first stored in secondary or auxiliary memory. Program and its related data are brought in main memory for execution. What if th

Data communication, how CSMA protocol is improved through persistence metho...

how CSMA protocol is improved through persistence methods & collition detection

Determine the address when network address prefixed by 1000, A network addr...

A network address prefixed by 1000 is? A network address prefixed through 1000 is Class B address.

Murtala hassan, frequency tracking

frequency tracking

Propositional inference rules, Propositional Inference Rules: Proposit...

Propositional Inference Rules: Propositional Inference Rules Equivalence rules are mostly useful because of the vice-versa aspect, that means like we can search backwards and

Execution of a full instruction - computer architecture, Execution of a ful...

Execution of a full Instruction: Regard as the instruction: Add (R3), R1 Executing this particular instruction needed the below described actions: a) Fetch the

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages