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

Canonical genetic algorithm - mating, Canonical genetic algorithm - Mating:...

Canonical genetic algorithm - Mating: In such a scenario this continues until the number of offspring that is produced is the required number. Further this required number is

Find simplified function f and implement, Q. Find simplified function F and...

Q. Find simplified function F and implement that function using only NAND gates. 1. F(A,B,C) = (A+B) (A'+B+C') (A'+B'+C') 2. F (A,B,C) = A'B'C'+B'CD'+A'BCD'+AB'C' 3. F(X,Y

Discuss different routing plan adopted in telephone network, Discuss differ...

Discuss different Routing plan adopted in a Telephone network. Hierarchical networks are able of handing heavy traffic where needed, and at similar time use minimal number of t

Main benefits of cd-rom, The main benefits of CD-ROMs are: These are...

The main benefits of CD-ROMs are: These are removable disks, thus they are suitable for archival storage mass replication is cheap and fast large storage capacity

Host computer-array processing, Host Computer: An array processor may be a...

Host Computer: An array processor may be attached to a host computer by the control unit. The reason of the host computer is to broadcast a sequence of vector instructions by CU t

Program accept decimal number and convert it into given base, Q Develop a p...

Q Develop a program that accepts decimal number and converts it into given base. Fractional numbers are allowed and negative numbers are not allowed. Also check that entered number

What is clear operation, Clear operation The clear operation compares w...

Clear operation The clear operation compares words present in A and B and produces an all 0's result if two numbers are equal. This operation is achieved by the exclusive-OR mi

Prove using boolean algebra, Q.Prove using Boolean Algebra 1. X (X+Y) = ...

Q.Prove using Boolean Algebra 1. X (X+Y) = X 2. AB + AC + BC' = AC + BC' 3. (A+B+C) (A+B'+C') (A+B+C') (A+B'+C)=A 4. (A+B'+C) (AB+A'C) = (A+C) (A'+B) 5. XY + XZ + YZ

Example on multi-statement forall construct, Q. Example on Multi-statement ...

Q. Example on Multi-statement FORALL construct? The subsequent statements set every element of matrix X to sum of its indices. FORALL (i=1:m, j=1:n) X(i,j) = i+j an

Explain the ccitt hierarchical structure of routing, Explain the CCITT hier...

Explain the CCITT hierarchical structure of routing using block schematic. In right-through routing the originating exchange finds the whole route from source to destination. N

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages