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

What is computer, WHAT IS COMPUTER? Computer is termed in the Oxford di...

WHAT IS COMPUTER? Computer is termed in the Oxford dictionary as "An automatic electronic apparatus for making controlling operations or calculations    which are expressible i

Expand cpi-c, Expand CPI-C. CPI-C= Common Program Interface Communica...

Expand CPI-C. CPI-C= Common Program Interface Communication.

What is branch instruction, What is branch instruction? As a result of ...

What is branch instruction? As a result of branch instruction is a type of instruction which loads a latest values into the program counter.

Sequential execution of instructions in risc, Q. Sequential Execution of In...

Q. Sequential Execution of Instructions in RISC? Let's describe pipelining in RISC with an illustration program execution sample. Take the given program (R denotes register).

Example of pruning, Example of Pruning: As an example, we are assume t...

Example of Pruning: As an example, we are assume that the four choices for player one, there we are looking only two moves ahead 1 for player one and 1 for player two such as

Very long instruction word architecture, Superscalar architecture was desig...

Superscalar architecture was designed to increase the speed of the scalar processor. But it has been realized it's not easy to apply. Subsequent are a number of problems faced in t

Forward chaining - artificial intelligence, Forward Chaining - Artificial i...

Forward Chaining - Artificial intelligence: Imagine we have a set of axioms which we know are true statements regarding the world. If we set these to each be a starting state o

Illustrate diffrent types of modems, Q. Illustrate Diffrent types of modems...

Q. Illustrate Diffrent types of modems? There are four different types of modems: half-duplex, full-duplex, synchronous, and asynchronous.With half-duplex modems data can be tr

Queueing process, explain in detail about queueing process

explain in detail about queueing process

State the advantages off-the-shelf, State the advantages Off-the-shelf ...

State the advantages Off-the-shelf -  tends to be less expensive as development costs can be spread over many users -  can be more sophisticated as large sales bring in c

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