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

By which the speech of side tone is heard, Side tone is the speech heard by...

Side tone is the speech heard by (A)  the receiving subscriber (B)  both the receiving and calling subscriber (C) by on looker (D) by calling subscriber Ans

Biscuit factory circuit, Biscuits move on a conveyer through an oven where ...

Biscuits move on a conveyer through an oven where they are cooked.   Two sensors, H and C, measure the temperature of the oven, H = 1 if the oven is too hot and C = 1 if the ove

Convert the following into sop form, Convert the following into SOP form ...

Convert the following into SOP form 1. (A+B) (B'+C) (A'+ C) 2. (A'+C) (A'+B'+C') (A+B') 3. (A+C) (AB'+AC) (A'C'+B)

Visibility, hidden edge/surface removal

hidden edge/surface removal

Nmknl''knl, Ask question bhjjnjnnjnjm#Minimum 100 words accepted#

Ask question bhjjnjnnjnjm#Minimum 100 words accepted#

Cohesion and coupling, can i get a prepared ppt for this topic to present i...

can i get a prepared ppt for this topic to present it in a seminar??

Prove boolean identities using boolean algebra, Prove the following Boolean...

Prove the following Boolean identities using the laws of Boolean algebra: ABC + AB ‾C + ABC ‾ = A(B + C) Ans. ABC+AB'C+ABC'=A(B + C) LHS AC(B+B')+AB(C+C') OR  AC+AB OR  A(B

Real life business subsystems, Real Life Business Subsystems A Subsyst...

Real Life Business Subsystems A Subsystem is a component of a System even though it can also be described as a system in its own right. Consider a manufacturing firm. It compr

Define html, HTML is a Hyper text Markup Language and it is  Scripting La...

HTML is a Hyper text Markup Language and it is  Scripting Language

Explain about integration levels, Q. Explain about Integration Levels? ...

Q. Explain about Integration Levels? Initially only few gates were integrated consistently on a chip. This initial integration was termed as small-scale integration (SSI). With

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