Writing down your own interrupt service routines, Computer Engineering

Assignment Help:

Q. Writing down your own Interrupt Service Routines?

Here are a few rules which should be kept in mind while writing down your own Interrupt Service Routines:

1.  Use Int 21h, function 35h to get the needed IVT entry from IVT. Save this entry for later use.

2.  Use Int 21h, function 25h to modify IVT. 

3.  If your program isn't going to stay resident then save the contents of the IVT and later restore them when your program exits.

4.  If your program is going to stay resident then use one of the terminate and stay resident functions to reserve proper amount of memory for your handler.


Related Discussions:- Writing down your own interrupt service routines

Explain the term- intranet, Explain the term- Intranets Various compani...

Explain the term- Intranets Various companies use intranets as well as the internet. Simple definition is "An intranet is a computer network which is based on internet technolo

What are the basic components of dialog program, What are the basic compone...

What are the basic components of dialog program? Screens (Dynpros) Every dialog in an SAP system is controlled by dynpros. A dynpros having of a screen And its flow log

What is .net and .net framework, What is .NET / .NET Framework?  It i...

What is .NET / .NET Framework?  It is a Framework in which Windows applications might be developed and run. The Microsoft .NET Framework is a platform for building, deploying,

Indias parallel computers, Parallel Computers In India, the design and ...

Parallel Computers In India, the design and development of parallel computers in progress in the early 80?s. The Indian Government recognized the Centre for Development of Adva

What is the main function of the memory-management unit, What is the main f...

What is the main function of the memory-management unit? The runtime mapping from virtual to physical addresses is done by a hardware device known as a memory management unit

Explain the odd-even transposition algorithm, Q. Explain the odd-even trans...

Q. Explain the odd-even transposition algorithm? The algorithm needs one 'for loop' beginning from I=1 to N it implies that N times and for every value of I, one 'for loop' of

Describe about relationships and look up fields, Relationships are imported...

Relationships are imported from the source to finish without any hindrance but once they land in the destination they can never be changed or changed and change of extensions canno

How can a shift register be used as a counter, What is a shift register? Ca...

What is a shift register? Can a shift register be used as a counter? If yes, explain how?     Ans: Shift Register: A register wherein data gets shifted towards left or right

Hypothetical reliable data transfer protocol, the c code for hypothetical r...

the c code for hypothetical reliable data transfer protocol

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd