Define interrupts in assembly language, Computer Engineering

Assignment Help:

Q. Define Interrupts in assembly language?

An interrupt causes interruption of an ongoing program. A number of the common interrupts are: printer, monitor, keyboard, an error condition and trap etc. 

8086 identifies two types of interrupts: Software interrupts and Hardware interrupts.

Hardware interrupts are produced when a peripheral Interrupt servicing program requests for some service. A software interrupt causes a call to OS. It generally is the input-output routine. 

Let's discuss software interrupts in more detail. A software interrupt is started using following statements:

INT number

In 8086 this interrupt instruction is processing employing the interrupt vector table (IVT). The IVT is situated in the first 1K bytes of memory and has a total of 256 entities every one of them of 4 bytes. An entry in interrupt vector table is recognised by the number provided in the interrupt instruction. Entry stores the address of operating system subroutine which is used to process interrupt. This address can be different for numerous machines. Figure belowdisplays the processing of an interrupt.

2478_Define Interrupts in assembly language.png

Figure: Processing of an Interrupt


Related Discussions:- Define interrupts in assembly language

Explain the methods of implementing interacting processes, Explain any two ...

Explain any two methods of implementing interacting processes. Two methods of implementing interacting process are given below: (i) Shared memory solution: In this scheme

What is synchronous message passing, Q. What is Synchronous message passing...

Q. What is Synchronous message passing? In Synchronous message passing is executed on synchronous communication network.  In that case sender and receiver processes should be

Extjs, tell some thing about htmleditor in extjs whether it contains attach...

tell some thing about htmleditor in extjs whether it contains attachment button or not

What do you mean by proc directive, Q. What do you mean by PROC Directive? ...

Q. What do you mean by PROC Directive? PROC Directive: Code segment comprises executable code for a program that includes one or more procedures defined initially with PROC dir

How to copy files from a drive and directory, Q. How to copy files from a d...

Q. How to copy files from a drive and directory? You can copy files from a drive and directory other that the currently selected one. However in that case, you need to speci

Which address is specially used by transport layer, The addressing speciall...

The addressing specially used by Transport Layer is? The addressing particularly used through transport layer is application port address.

Two properties of recursion, Two properties of recursion are:- 1. A sm...

Two properties of recursion are:- 1. A smallest, base case that is processed without recursion and acts as decision criterion for stopping the method of computation and 2.

Operating system, define request edge and assignment edge

define request edge and assignment edge

Determine in detail about mp3 - mpeg-3, Determine in detail about MP3 (MPEG...

Determine in detail about MP3 (MPEG-3) MPEG-3 uses an audio compression technology; it compresses CD-quality sound by a factor of about 10 while retaining most of the quality f

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