Explain about interrupt cycle, Computer Engineering

Assignment Help:

Q. Explain about Interrupt Cycle?

On completion of execute cycle the current instruction execution gets completed. At this point a test is made to conclude whether any enabled interrupts have occurred. If so interrupt cycle is performed. This cycle doesn't execute an interrupt however causes start of execution of Interrupt Service Program (ISR). Please note the ISR is executed as just another program instruction cycle. Nature of this cycle differs greatly from one machine to another. A typical sequence of micro-operations of interrupt cycle are:

 

T1:   MBR ← PC

T2:   MAR←Save-Address 

         PC   ←ISR- Address 

T3:  [MAR] ← MBR

At time T1 contents of the PC are transferred to MBR so that they can be saved for return from the interrupt. At time T2 MAR is loaded with address at which contents of PC are to be saved, and PC is loaded with address of start of the interrupt-servicing routine. At instance T3 MBR that comprises old value of the PC is stored in memory.  Processor is now ready to begin subsequent instruction cycle.


Related Discussions:- Explain about interrupt cycle

How are the instructions executed and interpreted, Q. How are the instructi...

Q. How are the instructions executed and interpreted? All computers have a Unit which performs arithmetic and logical functions. This Unit is called as Arithmetic and Logic Uni

Java program , Q.--> The program simulates a student management system havi...

Q.--> The program simulates a student management system having thE following:The interface uses command buttons to (i) add,edit,delete,update and cancel the records, (ii) to naviga

What is soap and how does it relate to xml, The Simple Object Access Protoc...

The Simple Object Access Protocol (SOAP) uses XML to describe a protocol for the exchange of information in distributed computing environments. SOAP having of three components: an

What is optical character recognition, What is Optical character recognitio...

What is Optical character recognition (OCR)  Information on paper is automatically read by a scanner and is then processed/analysed by OCR software and stored in an electronic

++ c, how to find the integral of a function represented by collection of e...

how to find the integral of a function represented by collection of experimental data

Discuss about second generation electronic computers, Second Generation (19...

Second Generation (1954-1962) The second generation saw various significant developments at every level of computer system design, from technology used to build the basic circu

Components of a 3-tier client server, What are the essential components of ...

What are the essential components of a 3-tier client server In a three-tier or multi-tier environment, the client executes the presentation logic (the client). The business log

What is the different between index and subscript, Subscript refers to the ...

Subscript refers to the array of occurrence, whereas Index shown an occurrence of a table element. An index can only modified using perform, search & set. Require to have an index

What is event-based simulator, Event-based Simulator Digital  Logic  S...

Event-based Simulator Digital  Logic  Simulation  method  sacrifices  performance  for  rich  functionality:  each active signal  is  calculated  for  every  device  it  propa

:P, My name is mrs flo and i apporve dubstep, do you apporve it?

My name is mrs flo and i apporve dubstep, do you apporve it?

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