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

Information system for strategic advantage, Q. Describe short note on Infor...

Q. Describe short note on Information system for strategic advantage? Ans. Strategic role of information systems engage using information technology to develop products or serv

Associative array processing, Consider that a list of record or a table is ...

Consider that a list of record or a table is stored in the memory and you wish to find some information in that particular list. E.g. the list comprises three fields as displayed b

What functions connect( )& accept( ) call in socket interfac, What function...

What functions connect( ) and accept ( ) call in Socket interfacing? connect() system call: Clients use procedures connect to initiate connection with an exact server. The

What is the significance of nonactionattribute, In general, all public proc...

In general, all public processes of a controller class are treated as action processes. If you require prevent this default behaviour, just decorate the public process with NonActi

Elaborate state space search briefly, Artificial Intelligence 1. Explai...

Artificial Intelligence 1. Explain about artificial intelligence? What are the achievements of AI? 2. Elaborate state space search briefly. 3. Prove that A* is optimal.

What is set screen, SET SCREEN With SET SCREEN the present screen simpl...

SET SCREEN With SET SCREEN the present screen simply specifies the next screen in the chain , control branches to this next screen as soon as the current screen has been proce

Explain the program translation model, Explain the program translation mode...

Explain the program translation model The program translation model makes the execution gap through translating a program written in a programming language, termed as the sou

Explain multihomed host, Write short notes on the Multihomed host. A ho...

Write short notes on the Multihomed host. A host computer that connects to multiple networks is termed as multi-homed host. Multihoming is occasionally used to raise reliabilit

Working on dreamweaver, Write your text, format text, insert picture throug...

Write your text, format text, insert picture through Object window or INSERT -> IMAGE. Insert Menu provides you all features which are available under the Object window. Modify men

DW, Define a job scheduling strategy that will meet business requirement of...

Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages