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

Describe critical directive in fortan, Q. Describe Critical Directive in FO...

Q. Describe Critical Directive in FORTAN? The critical directive permits one thread executes associated structured block. When one or more threads attain critical directive the

What is the function of a data element, What is the function of a data elem...

What is the function of a data element? A data element defines the role played by a domain in a technical context.  A data element having of semantic information.

Represent negative numbers in the computer system, Q. What are the values o...

Q. What are the values of x, y, and z. (1011.001101)2 = (x)10 = (y)8 = (z)16 Q. What are the various ways to represent Negative Numbers in the Computer system?

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

Write an interrupt routine to handle division by zero, Q. Write an interrup...

Q. Write an interrupt routine to handle 'division by zero'? This file can be loaded just like a COM file though makes itself permanently resident until the system is running.

What are the characteristics of the e-cash, What are the characteristics of...

What are the characteristics of the E-Cash? These kinds of payments, turning the Internet within a transaction oriented forum, need mediums which are easy and cheap (through a

Explain tabulation method for simplifying k maps, Explain Tabulation Method...

Explain Tabulation Method for simplifying k maps? The Tabulation Method (QUINE-McCLUSKEY MINIMIZATION) An expression is represented in the canonical SOP form if not

Area under curve , Write a program to find the area under the curve y = f(x...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Differentiate between validation and simulation, Question 1: a) Name a...

Question 1: a) Name and give a brief description of three Real-Time Systems. b) State three downfalls of Embedded Systems. c) Differentiate between a microprocessor an

Explain the outsourcing barriers that an organization faces, Explain the ou...

Explain the outsourcing barriers that an organization faces. 1. Critical operations that cannot be outsourced. 2. Negative customer reaction. 3. Employee resistance. 4

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