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

Define edge triggered d flip flop, Define Edge Triggered D flip-flop? D...

Define Edge Triggered D flip-flop? D latch has only two inputs C(control) and D(data). The operation of a D flip-flop is a lot simpler and it has only one input addition to the

Explain the resources of an operating system, Explain the resources of da...

Explain the resources of data structure is used by an operating system to keep track of process information? Explain A process is a program in execution. An operating system

Non-repudiation achieved in designing e-cash based system, How can non-repu...

How can non-repudiation be achieved into designing e-cash based system? E-cash is fundamentally an online solution. The buyer should validate the coins by the issuer so as to g

Explain the commonly used code optimization techniques, Explain briefly any...

Explain briefly any three of the commonly used code optimization techniques. 1. Common sub expression elimination: In given expression as "(a+b)-(a+b)/4", in such "common

Device drivers in assembly, Device drivers are special programs installed b...

Device drivers are special programs installed by config.sys file to control installable devices.  So personal computers can be expanded at some future time by installation of new d

Find sop expression, A. F(X, Y, Z) = ∑(0, 1, 2, 6, 7) using TRUTH TABLE onl...

A. F(X, Y, Z) = ∑(0, 1, 2, 6, 7) using TRUTH TABLE only B. F(X,Y,Z) = ∑ (4,6,7,8) + D(2,5,11,12) using K-Map 1. Find SOP expression 2. Simplify SOP expression 3. Implem

What do you mean by program counter, Q. What do you mean by Program Counter...

Q. What do you mean by Program Counter? Program Counter (PC): It determines the instruction that is to be executed next which means after the execution of an on-going instructi

Formal analysis of visual elements, Formal Analysis: The second step o...

Formal Analysis: The second step of the art critiquing process often begins with an analysis of the artworks formal elements and how they are the organised. The formal elem

Illustrate an object model for university system, An object model for unive...

An object model for university system Establishing relationship among various classes in the system is the primary activity. Here, we have a simple model of a University System

Which process is used for page reference, Locality of reference implies tha...

Locality of reference implies that the page reference being made by a process is Ans. Locality of reference means that the page reference being made through a process is proba

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