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

Define abap/4 layer, Define ABAP/4 layer? The ABAP/4 layer defines the ...

Define ABAP/4 layer? The ABAP/4 layer defines the data formats used by the ABAP/4 processor.

Pros and cons of general purpose register architecture, Q. Pros and Cons of...

Q. Pros and Cons of general purpose register architecture? General Purpose Register Architecture: Pros and Cons Registers can be employed to store variables as it decrea

Array is a pointer to pointer to int, Array is a pointer-to-pointer-to-int:...

Array is a pointer-to-pointer-to-int: at the first level, it points to a block of pointers, one for each row. That first-level pointer is the first one we allocate; it has nrows e

Jewel polishing, Byteland county is very famous for luminous jewels. Lumino...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

What is uml, ? UML is called as Unified Modeling Language. ? it is used...

? UML is called as Unified Modeling Language. ? it is used to Graphical language for visualizing artifacts of the system. ? It Allow to make a blue print of all the aspects

Determine about the term- voice synthesis, Voice synthesis Loud speakers ...

Voice synthesis Loud speakers and special software are used to output information in the form of sound to help blind and partially-sighted people; it also helps people who have d

Btree, What should the size of ''t'' in btree be depending on the hard disk...

What should the size of ''t'' in btree be depending on the hard disk size

What are conversion routines, What are conversion routines? Non-standa...

What are conversion routines? Non-standard conversions from present format to sap internal format and vice-versa are executed with so known as conversion routines.

Define hypertext verses hypermedia briefly, Define Hypertext verses Hyperme...

Define Hypertext verses Hypermedia briefly. Hypertext is fundamentally the same as regular text- this can be stored, read, searched or edited along with a significant exception

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