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 how server form post-back works, Briefly explain how server form po...

Briefly explain how server form post-back works?  Post Back: The process in which a Web page sends data back to the similar page on the server. View State: View State is the m

Visual basic application, Name the platforms by which visual basic applicat...

Name the platforms by which visual basic applications are available? Ans) Most of the visual basic applications are available on 32 bit Intel platforms. These applications also

Perform multiplication with showing content of accumulator, Perform multipl...

Perform multiplication with showing the contents of accumulator, B register and Y register during each step. (Accumulator, B, Y are 4-bit registers) B=06 Y=02

What is the file-system security, What is the File-system security Most...

What is the File-system security Most commercial servers use a powerful operating system as base that provides good methods of file-system security. Some servers require additi

State about the three-dimensional digitizers, State about the Three-dimensi...

State about the Three-dimensional digitizers Three-dimensional digitizers use sonic or electromagnetic transmissions to record positions. One electromagnet transmission method

Explain hardwired control organization, Q. Explain Hardwired control organi...

Q. Explain Hardwired control organization? In the hardwired organization control unit is designed as a combinational circuit. The control unit is applied by gates, flip-flops,

File history.d1 contains a brief history of computing, File History.d1 cont...

File History.d1 contains a brief history of computing. There are no indentations in this file. Write a program to read this file, inserting five blank spaces at the beginning of ea

Overall computing time, Clustering has been existing since the 1980s when i...

Clustering has been existing since the 1980s when it was used in DEC's VMS systems. IBM's SYSLEX is a cluster approach for a mainframe system. Sun Microsystems, Microsoft, and othe

Define html, HTML is a Hyper text Markup Language and it is  Scripting La...

HTML is a Hyper text Markup Language and it is  Scripting Language

Variance of predictions is expected to decrease, Suppose the random sample ...

Suppose the random sample used for each tree in the previous random forest is decreased from 1000 rows to 500 rows. Circle ALL that are true for the ensemble classifier. a) Vari

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