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

Ia-32 support, In order to support IA-32, the Itanium can switch into 32-bi...

In order to support IA-32, the Itanium can switch into 32-bit mode with special jump escape instructions. The IA-32 instructions have been mapped to the Itanium's functional units.

CRTscreen as a two-dimensional matrix, Explain the statement- CRT screen as...

Explain the statement- CRT screen as a two-dimensional matrix One can imagine the CRT screen as a two-dimensional matrix which has m rows and n  columns and this is usually ref

What do you mean by underflow and overflow of data, What do you mean by und...

What do you mean by underflow and overflow of data? Underflow and overflow of data: When the value of the variable is either too long or too small for the data type to hold,

What are the external storage systems, External storage systems A numb...

External storage systems A number of different types of external memory devices are available now. Some of these are considered below (hard drives haven't been mentioned as th

Analytical engine by babbage, Charles Babbage 'The grandfather of modern co...

Charles Babbage 'The grandfather of modern computer' had designed two computers: The Difference Engine: It was based on mathematical principle of finite differences and was us

Explain about the passive graphics device, Explain about the passive graphi...

Explain about the passive graphics device A passive graphics device simply draws pictures under computer control; i.e. it allows the computer to communicate graphically with th

Differentiate between raid 0 and raid 1, Problem 1 a) Give three reaso...

Problem 1 a) Give three reasons why connecting peripherals directly to the system bus are not a good practice. b) Name five categories in which the major functions on requ

Define the terms- action semantics and argouml, Define the terms- Action Se...

Define the terms- Action Semantics and  ArgoUML Action Semantics : Action semantics is a group of firms that have responded to the OMG's RFP to define the action semantics fo

Define instruction code, Define Instruction Code. An Instruction code i...

Define Instruction Code. An Instruction code is a group of bits that instructs the computer to perform an exact operation. It is usually separated into parts, each having its o

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