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 microcomputers, Q. What is Microcomputers? Microcomputers have ...

Q. What is Microcomputers? Microcomputers have become a common part of everyday life. The cost ranging from a few hundred to about ten thousand dollars, today's 16- and 32-bi

Explain various steps for analysing an algorithm, Explain various steps for...

Explain various steps for analysing an algorithm.  The several steps involved in analysis of an algorithm are: 1. For any algorithm, the first step should be to show that it

Explain the working of any one of centralized spc, Explain the working of a...

Explain the working of any one of centralized SPC? Standby mode of operation is the easiest of dual processor configuration operations. Usually, one processor is active and

Hashing collision resolution techniques, Hashing collision resolution techn...

Hashing collision resolution techniques are a) Chaining, b) Bucket addressing

Which layer is not present in TCP/IP model, Which Layer is not present in T...

Which Layer is not present in TCP/IP model? Presentation layer is not present into Transfer Control Protocol/IP Model.

C programming, Find out useless nonterminal symbols use c program.

Find out useless nonterminal symbols use c program.

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

Ask question bhjjnjnnjnjm#Minimum 100 words accepted#

Reading decision trees - artificial intelligence, Reading Decision Trees ...

Reading Decision Trees There is a link between decision tree representation and logical representations, which may be exploited to form it more easy  to understand and learned

Compare the memory devices ram and rom, Compare the memory devices RAM and ...

Compare the memory devices RAM and ROM. Ans. Comparison of Semi-conductor Memories RAM ands ROM The advantages of ROM are: 1. This is cheaper than RAM. 2. This is non-volatil

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