Opcode field of an instruction, Computer Engineering

Assignment Help:

For this machine there can be two more possible addressing modes in addition to direct andimmediate.  

Opcode field of an instruction is a group of bits which define various processor operations like LOAD, STORE, ADD and SHIFT to be performed on some data stored in registers or memory.  

The operand address field can be data or can refer to data- which is address of data or can be labels which may be the address of an instruction you want to execute next, these kind of labels are generally used in Subroutine call instructions. An operand address may be: 

  • CPU register address
  • Memory address
  • I/O device address

The mode field of an instruction specifies a range of alternatives for referring to operands using the given address. Please note that if operands are placed in processor registers then an instruction executes faster than that of operands placed in memory as the registers are very high-speed memory used by CPU. Though to put the value of a memory operand to a register you will need a register LOAD instruction.


Related Discussions:- Opcode field of an instruction

Support activities in supply chain management, What are the some support ac...

What are the some support activities in primary functions of Supply Chain Management? To support primary functions of Supply Chain Management there will be a company’s infrastr

Explain operation of time multiplexed space switching, With a neat diagram ...

With a neat diagram explain operation of time multiplexed space switching. Time division switches, an inlet or an outlet corresponded to a particular subscriber line with one s

Identify the main enhancements brought along by tkip, Question: (a) Id...

Question: (a) Identify the four main enhancements brought along by TKIP on WPA to solve the problems in WEP. (b) The term WarDriving has been frequently used while talking

Describe the uses of credit cards and smart cards, Credit cards and smart c...

Credit cards and smart cards Credit cards comprise a magnetic stripe on the back made up of iron-based particles in a plastic film. Stripe is split up into 3 tracks which a

Support for high-level language, With the increasing use of more and higher...

With the increasing use of more and higher level languages manufacturers had offered more powerful instructions to support them. It was claimed that a stronger instruction set will

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

How to add noise to an image in matlab, The function noise.m, now installed...

The function noise.m, now installed on ashland too, adds Gaussian, salt, uniform and pepper, additive or multiplicative noise to an image

What is layer, What is layer? A layered system is ordered set of virtua...

What is layer? A layered system is ordered set of virtual worlds. Every build-in terms of one's below it and providing the execution basis for one above it. The objects in ever

High level expertise, The most useful feature of an expert system is the h...

The most useful feature of an expert system is the high level expertise it provides to aid in problem solving. This expertise can represent the best thinking of the top

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