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 do we synthesize verilog into gates with synopsys, How do we synthesize...

How do we synthesize Verilog into gates with Synopsys? The answer can, of course, occupy various lifetimes to completely answer.. BUT.. a straight-forward Verilog module can b

Explain e-mail gateways, Explain E-mail gateways. Email using SMTP work...

Explain E-mail gateways. Email using SMTP works better while both the sender and the receiver are on the Internet and can support TCP connections among sender and receiver. Tho

Data manipulation is essential, Based on the variables, construct a design ...

Based on the variables, construct a design that haves only main effects of one categorical IV and at least 2 continuous DVs. Discuss what you think the relationship is among the de

Describe five bit even parity checker, Describe five bit even parity checke...

Describe five bit even parity checker. Ans: Five bit even parity checker: EX-OR gates are utilized for checking the parity as they generate output 1, while the input ha

Define rom, Define ROM? It is a non-volatile memory. It includes only r...

Define ROM? It is a non-volatile memory. It includes only reading of stored data.

Explain in detail about first generation electronic computer, First Generat...

First Generation Electronic Computers (1937-1953) Three machines have been promoted at different times as first electronic computers. These machines used electronic switches

What about division and multiply operations, Q. What about division and mul...

Q. What about division and multiply operations? In most of the older computers divisions and multiply were implemented using subtract/add and shift micro-operations. If a digit

Determine about the pick device, Determine about the Pick Device Light ...

Determine about the Pick Device Light Pens The light pen used to select screen positions by detecting the light coming from points on the CRT screen. These are sensitive to

Granularity and , Granularity In parallel computing, granularity is a ...

Granularity In parallel computing, granularity is a important measure of the ratio of computation to communication. Coarse Granularity: relatively huge amounts of computa

How do you split hydrogen and oxygen gases, Q. How do you split Hydrogen an...

Q. How do you split Hydrogen and Oxygen gases in industrial electrolysis of water process? Answer:- In oxygen, electrolysis and hydrogen gas are produced at different elec

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages