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

Write unix commands, For the following, cmd1 and cmd2 are arbitrary UNIX co...

For the following, cmd1 and cmd2 are arbitrary UNIX commands, and file1 and file2 are files owned by you. Write UNIX (bash) commands to: (a) Run cmd1 and append its output to f

What is arithmetic pipeline, What is arithmetic pipeline?  Pipeline ari...

What is arithmetic pipeline?  Pipeline arithmetic units are usually found in very high speed computers. They are used to execute floating point operations, multiplication of fi

What is an event handler, An event handler is a part of a computer program ...

An event handler is a part of a computer program formed to tell the program how to act in response to a definite event.

What is layer, What is layer? A layered system is ordered set of virtua...

What is layer? A layered system is ordered set of virtual worlds. Every build-in terms of one's below it and providing the execution basis for one above it. The objects in ever

Define the terms - spatial locality and temporal locality, Define the terms...

Define the terms : spatial locality and temporal locality. Spatial Locality:  The spatial aspect means that instructions in close proximity to a recently implemented instruct

List the acid properties, a. List the ACID properties. Describe the usefuln...

a. List the ACID properties. Describe the usefulness of each. b. During its implementation, a transaction passes by several states, until it finally commits or aborts. List all

Data hazards in computer architecture, Data hazards -  computer architec...

Data hazards -  computer architecture : A main effect of pipelining is to alter the relative timing of instructions by overlapping their execution. This introduces contro

Write an algorithm to outline the macro-expansion, Write an algorithm to ou...

Write an algorithm to outline the macro-expansion using macro-expansion counter. The flow of control throughout macro expansion can be implemented by using a MEC that is macro-

How is secure sockets layer relied on the certificates, How is Secure Socke...

How is Secure Sockets Layer relied on the certificates? The Secure Sockets Layer standard is not a single protocol, but quite a set of accepted data transfer routines which a

Real life decoding, We have not considered the time element in our decoding...

We have not considered the time element in our decoding. An important time for decoding is the time from the address strobe (AS) to when the data is required in a read.   Time

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