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

Describe thead, Q. Describe THEAD, TBODY and TFOOT tag? THEAD, TBODY, ...

Q. Describe THEAD, TBODY and TFOOT tag? THEAD, TBODY, TFOOT , , and form groups of rows. specifies that a group of rows are heade

Version control systems, The next major set of tasks to tackle are delete a...

The next major set of tasks to tackle are delete and update. Version control systems typically version updates to a ?le and only store the differences between the ?les. Two system

How can we use ordered lists, Q. How can we use Ordered Lists? Lists ha...

Q. How can we use Ordered Lists? Lists having numbered items are termed as ordered lists. They are used when items in the list have a natural order. They can also be used when

Background and foreground colors can be interchanged, Background and foregr...

Background and foreground colors can be interchanged using the command?? Format Inverse command.

What is external modems, Q. What is External Modems? External Modems: M...

Q. What is External Modems? External Modems: Modems externally associated to PC via a parallel or serial port and into a telephone line at the other end.  They can generally co

Assignment, zero, one, two three address instructions

zero, one, two three address instructions

Control flow diagram, creating a control flow question for atm system

creating a control flow question for atm system

A subroutine can contain nested form and endform blocks, A subroutine can c...

A subroutine can contain nested form and endform blocks. False.

Illustrate cache dram, Q. Illustrate Cache DRAM? Cache DRAM (CDRAM) wh...

Q. Illustrate Cache DRAM? Cache DRAM (CDRAM) which is developed by Mitsubishi integrates a tiny SRAM cache (16Kb) on a generic DRAM chip. SRAM on the CDRAM can be used in two

Explain in detail about touch screens, Explain in detail about Touch screen...

Explain in detail about Touch screens For people who can't use a keyboard allowing input; also helps people with learning difficulties since icons are easier to understand

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