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

How much duration is required for an off-hook signal, An off-hook signal wi...

An off-hook signal will repeat for a/an                   duration. For a/an finite duration, an off-hook signal will repeat.

Why is the wait-for-memory-function-completed, Why is the Wait-For-Memory-F...

Why is the Wait-For-Memory-Function-Completed step required when reading from or writing to the main memory? WMFC step is needed for the write control signal / read control si

Describe about full adder, Q. Describe about full adder? Let's take ful...

Q. Describe about full adder? Let's take full adder. For this other variable carry from previous bit addition is added let'us call it 'p'. Truth table and K-Map for this is dis

What are the two types of branch prediction techniques, What are the two ty...

What are the two types of branch prediction techniques available?  The two types of branch prediction methods are  1) Static branch prediction  2) Dynamic branch predicti

What is time slicing, What is time slicing? With this technique each pr...

What is time slicing? With this technique each program runs for a short period known as a time slice, and then another program runs for its time slice and so on.

Describe architecture of wap gateway, Describe architecture of WAP gateway....

Describe architecture of WAP gateway. WAP GATEWAY : It is a very unique product giving semi-automatic redirection of HTML documents to WAP compatible mobile phones. Wir

JAVA, HOW WAS JAVA INVENTED?

HOW WAS JAVA INVENTED?

How non- textual information is contained in a web page, How non- textual i...

How non- textual information is contained in a web page? Non-textual information as digitized photo and a graphics image is not inserted directly into a HTML document. In place

Function of osi transport layer, Q. Function of OSI Transport Layer? - ...

Q. Function of OSI Transport Layer? - It takes the information to be sent as well as breaks it into individual packets that are sent and reassembled into a complete message by

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