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

Addressability of memory - computer architecture, Addressability: Loc...

Addressability: Location-addressable Each alone accessible unit of information in storage is chosen with its numerical memory address. In the modern computers, location-a

The advantage of using a database management system, The advantage of using...

The advantage of using a Database Management System The advantage of using a Database Management System for a data store is that databases have mechanisms for describing data,

What is dynamic random access memory, What is dynamic random access memory ...

What is dynamic random access memory Computer memory today comprises mainly of dynamic random access memory (DRAM) chips which have been built into multi-chip modules that are

What is centralized spc, What is centralized SPC, what are its modes of ope...

What is centralized SPC, what are its modes of operation? In this centralized control, all the control equipment is replaced through a single processor that must be quite power

Illustration of parallel programming environments, Q. Illustration of paral...

Q. Illustration of parallel programming environments? Let's discuss illustrations of parallel programming environments of Intel paragaon XP/S and Cray Y-MP software. The Cra

Explain the different types of buses with neat diagram, Explain the differe...

Explain the different types of buses with neat diagram. When a word of data is transferred among units, all the bits are transferred in parallel over a set of lines known as bu

Explain virtual address, What is virtual address? The binary address th...

What is virtual address? The binary address that the processor used for either instruction or data known as virtual address.

Explain the term - rational rose and visio 2000 enterprise, Explain the ter...

Explain the term - Rational Rose and Visio 2000 Enterprise Rational Rose: IBM Rational RequisitePro is a powerful and easy-to-use tool for use case management and requirement

Multi-layer artificial neural networks, Multi-Layer Artificial Neural Netwo...

Multi-Layer Artificial Neural Networks : However we can now look at more sophisticated ANNs that are known as multi-layer artificial neural networks it means they have hidden

Effectiveness - efficiency - safety and utility of site, Based on your unde...

Based on your understanding of Unit 2, compile a set of five usability and/or user experience goals which you think will be useful in evaluating the two sites when gathering the in

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