Explain about control memory organization, Computer Engineering

Assignment Help:

Q. Explain about Control Memory Organization?

One of the simplest ways to organize control memory is to organize micro-instructions for different sub cycles of machine instruction in memory. The Figure below demonstrates such an organisation.

453_Explain about Control Memory Organization.png

Figure: Control Memory Organisation

Let us give an illustration of control memory organization. Let's take a machine instruction: Branch on zero. This instruction causes a branch to a specified main memory address if result of the last ALU operation is zero which means zero flag is set. Pseudocode of micro-program for this instruction would be;

                         Test "zero flag" If SET branch to label ZERO

                         Unconditional branch to label NON-ZERO 

ZERO:  (Microcode that causes replacement of program counter with address offered in instruction)

    Branch to interrupt or fetch cycle.

NON -ZERO:  (Microcode that can set flags if desired indicating branch hasn't taken place).

    Branch to interrupt or fetch cycle. (For Next- Instruction Cycle)


Related Discussions:- Explain about control memory organization

What is state and state diagram, What is state and state diagram? A sta...

What is state and state diagram? A state is an abstraction of values and links of an object. Set of values and links are grouped together into a state according to the group be

Develop system flow charts - nasa near earth object, Background Information...

Background Information The National Aeronautics and Space Administration (NASA) is the agency within the United States Government responsible for US space exploration. Within th

Types of security features employed in client server network, What are the ...

What are the types of security features employed in client server kinds of network? Security features employed in Client-Server types of network are as illustrated below: a)

What is backward compatible, A program is backward compatible if it can use...

A program is backward compatible if it can use files from an older version of itself. For a file saved in the program to be backward compatible, it must be possible to open the fil

What are the properties of e-cash, What are the properties of E-cash? ...

What are the properties of E-cash? Properties: a. Monetary Value: It must be backed through either cash, bank –certified cashier’s cheque and authorized credit cards.

Unification - artificial intelligence, Unification - Artificial intelligenc...

Unification - Artificial intelligence: We have said that the laws of inference for propositional logic detailed in the previous lecture can also be used in first-order logic.

What are prefetch instructions, What are prefetch instructions? Prefetc...

What are prefetch instructions? Prefetch instructions are those instructions which can be inserted into a program either by the programmer or by the compiler.

Illustrate programming based on message passing, Q. Illustrate Programming ...

Q. Illustrate Programming Based on Message Passing? Since we know programming model based on message passing employs high level programming languages such as C/C++ along with a

What is data movement, Data movement instructions shift data from one locat...

Data movement instructions shift data from one location to another. The source and destination locations are verified by the addressing modes, and can be registers or memory. Many

Data structure, explain different type of sparse matrix

explain different type of sparse matrix

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