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

Conversion of data types done between abap/4 & db layer, How is conversion ...

How is conversion of data types done between ABAP/4 & DB layer? Conversion among ABAP/4 data types and the database layer is complete within the database interface

Canonical genetic algorithm - mating, Canonical genetic algorithm - Mating:...

Canonical genetic algorithm - Mating: In such a scenario this continues until the number of offspring that is produced is the required number. Further this required number is

Differentiate between string constants & character constants, Computer Conc...

Computer Concepts & C Programming 1. Write a program to read four floating point numbers and find their sum and average. 2. What is the difference between string constants a

Show the layout of dvorak-dealey keyboard, Q. Show the layout of Dvorak-Dea...

Q. Show the layout of Dvorak-Dealey keyboard? This was one keyboard layout designed to be a challenger to QWERTY layout. This was designed by August Dvorak and William Dealey a

Explain about com add-ins, COM add-ins are software program's which are inc...

COM add-ins are software program's which are included into an application and they add already built in features to an existing application. They have general architecture across m

Function of host to host transport layer in tcp/ip protocol, Illustrate the...

Illustrate the function of host to host transport layer in TCP/IP protocol stack? Function of Host - to-Host Transport Layer: This protocol layer just above inter network

How are comparisons done in 8086 assembly language, Q. How are comparisons ...

Q. How are comparisons done in 8086 assembly language? There is a compare instruction CMP. Though this instruction just sets the flags on comparing two operands (both 16 bits

Loop used to show properties, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4  A loop invariant is

Difference between blocking and non-blocking, Difference between blocking a...

Difference between blocking and non-blocking Verilog  language  has  two  forms  of  the  procedural  assignment  statement:  blocking  and  nonblocking. The two are distinguis

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