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

How is EISA bus different from ISA bus, How is EISA bus different from ISA ...

How is EISA bus different from ISA bus? Extended Industry Standard Architecture (EISA) is a 32 bit modification to ISA bus. As computers became larger and had wider data buses,

NachoS, Can I get the scheduling code for NachOS?

Can I get the scheduling code for NachOS?

Determine the maximum amplitude of delta modulator, (a) Consider a sinusoid...

(a) Consider a sinusoidal signal m(t) = A cos(2πfmt) applied to a delta modulator with step size Δ. Determine the range of the step size so that slope overload will be avoided. Ass

Instruction level-parallelism based on granularity size, Instruction level ...

Instruction level This is the initial level and the degree of parallelism is uppermost at this level. The fine grain size is used at statement or instruction level as only few

Goals - artificial intelligence, Goals - artificial intelligence: One ...

Goals - artificial intelligence: One desirable way to make perfect an agent's performance is to enable it to have some details of what it is trying to complete. If it is given

Explain about quarter inch cartridge tapes, Q. Explain about Quarter Inch C...

Q. Explain about Quarter Inch Cartridge Tapes? Quarter Inch Cartridge Tapes (QIC Standard): These tape cartridges record information sequentially in a track with one head. Wh

How does the xml serializer work, How does the Xml Serializer work?  What A...

How does the Xml Serializer work?  What ACL permissions does a process using it require?   Xml Serializer needs write permission to the system's TEMP directory.

Why stored program control gains superiority over hard wired, In what way i...

In what way is stored program control superior to hard wired control? The SPC gains superiority over hard wired because of following points: SP C Ha

use and benefits of object-oriented programming, The Chocolate Delights Ca...

The Chocolate Delights Candy Company requires to add the following functionality to its cash register: When a customer is checking out, the cash register requires keeping the ne

What do you mean by instruction pipelining, After considering instruction e...

After considering instruction execution let's now describe a concept which is very popular in any CPU implementation. This conception is instruction pipeline.  To extract better

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