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

Differentiate between protected and real modes of an intel, Differentiate b...

Differentiate between protected and real modes of an Intel microprocessor Operation of Real mode interrupt: When microprocessor completes executing the current instruction, it

Compact disc - computer storage, Compact Disc; Compact Disc ( CD)   i...

Compact Disc; Compact Disc ( CD)   is an optical disc  which is used to  store digital data. It was initially developed to store sound recordings completely, but later it als

Three firm capabilities that are performance in e-commerce, Three firm capa...

Three firm capabilities that are critical for superior firm performance in e-commerce are:- 1.  Information technology capability,  2.  Strategic flexibility, and  3.  Tr

What is write-through protocol, What is write-through protocol? For a w...

What is write-through protocol? For a write operation using write-through protocol during write-hit: The cache location and the major memory location are updated concurrently.

Find resolution and output voltage of D/A convertor, A 6-bit R-2R ladder D/...

A 6-bit R-2R ladder D/A converter has a reference voltage of 6.5V. It meets standard linearity.Find (i) The Resolution in Percent. (ii) The output voltage for the word 011100.

Write a menu driven program, Q. Write a Menu driven program to convert the...

Q. Write a Menu driven program to convert the given Decimal number into Binary, Octal and Hexadecimal number. (Fractional numbers are allowed)

Illustrate the history of computers, Q. Illustrate the history of computers...

Q. Illustrate the history of computers? Let's now consider history of computers since this will give fundamental information about technological development trends in computer

Explain the operation of octal to binary encoder, Explain the operation of ...

Explain the operation of octal to binary encoder. Ans Octal to binary encoder consists of eight inputs, one for each of eight digits and three outputs which generate the con

Robotics artificial intelligence, what is robot?explain different types of ...

what is robot?explain different types of robots with respect to joints.

What is static timing, What is Static timing a. Delays over all paths a...

What is Static timing a. Delays over all paths are added up. b. All possibilities, including false paths, verified without the need for test vectors. c. Faster than simul

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