Define the addressing modes, Computer Engineering

Assignment Help:

Q. Define the ADDRESSING MODES?

The elementary set of operands in 8086 can reside in memory, register and immediate operand. How can these operands be retrievedby various addressing modes? The answer to the question above is provided in the subsequent sub-section. Large number of addressing modes assists in addressing complex data structures with ease. A number of specific Terms and registers roles for addressing:

Base register (BX, BP): These registers are employed for pointing to base of a stack, array etc.

Index register (SI, DI): These registers are employed as index registers in data and/or extra segments.

Displacement: It signifies offset from the segment address. 

Addressing modes of 8086

Mode

Description

 

Direct

Effective address is the displacement of memory variable.

 

Register Indirect

Effective address is the contents of a register.

[BX]

[SI]

[DI]

[BP]

Based

Effective address is the sum of a base register and a displacement.

LIST[BX] 

(OFFSET LIST + BX)

[BP + 1]

Indexed

Effective address is the sumof an index register and a displacement.

LIST[SI]

[LIST +DI]

[DI + 2]

Based Indexed

Effective address is the sum of a base and an index register.

[BP + DI]

[BP + DI]

Based Indexed with

displacement

Effective address is the sum of a base register, an index register, and a displacement. 

[BX + SI + 2]


Related Discussions:- Define the addressing modes

Web service as opposed to a non-serviced, Can you give an example of when i...

Can you give an example of when it would be appropriate to use a web service as opposed to a non-serviced .NET component? A web service has the following characteristics:  1

When can a user program execution be interrupted, When can a user program e...

When can a user program execution be interrupted? It won't be desirable to interrupt a program when an instruction is being executed and is in a state such as instruction decod

What is "at exit-command", What is "at exit-command:? The flow logic K...

What is "at exit-command:? The flow logic Keyword at EXIT-COMMAND is a special addition to the MODULE statement in the Flow Logic .AT EXIT-COMMAND lets you call a module befor

Decision tree learning for cancer diagnosis, Assignment 1: Decision tree le...

Assignment 1: Decision tree learning for cancer diagnosis In this mini-project, you will implement a decision-tree algorithm and apply it to breast cancer diagnosis. For each p

Command mode to insertion mode using vi editor, How to enter from command m...

How to enter from command mode to insertion mode using Vi Editor? Ans) There are various commands that put the VI editor into insert mode. The most usually used commands to get

The new optimal solution, Electrocomp's management realizes that it forgot ...

Electrocomp's management realizes that it forgot to contain two critical constraints. In particular, management decides that to make sure an adequate supply of air conditioners for

View the site files, To see a high-level representation of the structure of...

To see a high-level representation of the structure of a local site, you use Dreamweaver's Site Map view. You can also use site map to add new files to the site, to add, remove and

How optimization is achieved in dns, How optimization is achieved in DNS? ...

How optimization is achieved in DNS? Two primary optimizations used in DNS and they are: replication and caching. All root servers is replicated; various copies of the server

Performance of caches - computer architecture, Performance of caches: ...

Performance of caches:       Amdahl's Law regarding overall speed up:                  Alternatively, CPU stall can be considered:

Describe about second generation computers, Q. Describe about Second Genera...

Q. Describe about Second Generation Computers? Silicon brought advent of second generation computers. A two state device termed as a transistor was created from silicon. Transi

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