Explain about instruction cycle, Computer Engineering

Assignment Help:

Q. Explain about Instruction Cycle?

The instruction cycle for this provided machine comprises four cycles. Presume a 2-bit instruction cycle code (ICC). The ICC can represent the state of the processor in terms of cycle. For illustration we can use:

00:  Fetch 

01:  Indirect

10: Execute

11: Interrupt

At the end of each of four cycles ICC is set appropriately. Please note that an indirect cycle is always followed by execute cycle and interrupt cycle is always followed by fetch cycle. For both execute and fetch cycles, the subsequent cycle relies on the state of the system. Let's show an instruction execution employing instruction cycles and timing diagram:

1683_Explain about Instruction Cycle.png

Figure: Timing Diagram for ISZ instruction

Please note that address line decide the location of memory. Read/ write signal controls whether the data is being input or output. For illustration at time T2 in M2 read control signal becomes active A9 - A0 input comprises MAR that value is kept enabled on address bits and data lines are enabled to accept data from RAM so enabling a typical RAM data output on the data bus.

For reading no data input is applied by CPU however it is put on data bus by memory after the read control signal to memory is activated. Write operation is triggered along with data bus carrying the output value.


Related Discussions:- Explain about instruction cycle

General considerations for research -artificial intelligence, General Consi...

General Considerations for Research -artificial intelligence: If we can specify the initial state, the operators or a consumer and the goal check for a search problem, that al

Define the meaning of document and finger print, a. Define the meaning of "...

a. Define the meaning of "Document & Finger print" and "Message & Message Digest". What's the difference among the 2 pairs? b. Describe Davies Meyer scheme with diagram. c. W

Associative array processing, Associative Array Processing Consider tha...

Associative Array Processing Consider that a list of record or a table is stored in the memory and you want to search some information in that list. For example, the list havin

What are benefits to businesses by e-commerce over extranets, What are adva...

What are advantages and benefits to businesses by e-commerce over extranets? The advantages and benefits to businesses comprise: Less Paperwork: along with documents and bus

Definition of decision support system, Q. Definition of Decision support sy...

Q. Definition of Decision support system? Definition of DSS: A decision support system is a specific kind of information system which is an interactive system that supports in

Designing the instruction format, Q. Designing the instruction format is a ...

Q. Designing the instruction format is a complex art? Instruction Length Significance: It's the fundamental issue of the format design. It concludes the richness and flex

Variable ordering - forward checking, Variable ordering - Forward checking:...

Variable ordering - Forward checking: Hence this is different from variable ordering in two important ways as:  Whether this is a dead end when we will end up visiting a

Engineering and scientific software, Engineering and Scientific Software ...

Engineering and Scientific Software Engineering  and  Scientific  software  has  been  characterized  with "number crunching" algorithms. Application starts from astronomy t

Briefly define the term isotype, Question: (a) (i) Briefly define the t...

Question: (a) (i) Briefly define the term "Isotype". (ii) With the help of diagrams, describe the rules of "Isotype". (b) Elaborate on your understanding of internationa

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