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

Importance of barrier free design and web accessibility, Problem: (a) ...

Problem: (a) Accessibility can be classified as below: (i) Barrier-free design (ii) Web accessibility. Describe the importance of barrier free design and web accessibi

Define a socket, Define a socket? An application program interface give...

Define a socket? An application program interface gives the details of how can an application program interacts along with protocol software. But socket API is a defacto standa

Find 9''s compliment of bcd number using 4-bit binary adder, Design a circu...

Design a circuit for determining the 9's compliment of a BCD number by using 4-bit binary adder and some external logic gates? Compliment of a BCD number 9's co

Differentiate between static and dynamic memory, Differentiate between stat...

Differentiate between static and dynamic memory? The static RAM is simpler to use and has shorter read and write cycles. One of the main applications of static RAM is in execut

Graphic symbol of S-R flip-flop, Q. Graphic symbol of S-R flip-flop? R...

Q. Graphic symbol of S-R flip-flop? R-S Flip flop - Graphic symbol of S-R flip-flop is displayed in Fig below. It has 3 inputs S (set), R (reset) and C (for clock). Q(t+1) is

What is garbage collection and what is it used for, In computer science, ga...

In computer science, garbage collection (GC) is a form of automatic memory management. The garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by

What is master slave kernel, Q. What is Master slave kernel? Master sl...

Q. What is Master slave kernel? Master slave kernel: In this model just one of processors is assigned as Master.  The master is in charge for subsequent activities:  i)

m-files and the power point presentation, Power point presentation Arra...

Power point presentation Arrange a 20 minutes power point presentation showing the original and processed filters.  Discuss the methods used for processing and comment on each r

Bell lapadula model, A computer system provides protection using the Bell-L...

A computer system provides protection using the Bell-LaPadula policy. How would a virus spread if A) the virus were placed on the system at system low (the compartment that all o

Avoiding over fitting in decision trees, A v o iding Over fitting - Arti...

A v o iding Over fitting - Artificial intelligence As  we  discussed  in  the last  lecture,  over fitting  is  a  normal  problem  in machine learning. Decision trees suffe

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