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

Fuzzy logic - artificial intelligence, Fuzzy Logic: In the logics we a...

Fuzzy Logic: In the logics we are here described above, what we have been concerned with truth: whether propositions and sentences are true. Moreover, with some natural langua

Define terminal symbols, Define Terminal symbols? Terminal symbols: T...

Define Terminal symbols? Terminal symbols: These are literal strings forming the input of a formal grammar and can't be broken down in slighter units without losing literal m

Network, Give an intuitive explanation of why the maximum throughput, for s...

Give an intuitive explanation of why the maximum throughput, for small beta, is approximately the same for CSMA slotted Aloha and FCFS splitting with CSMA. Show the optimal expecte

Colour management, There are three primary colours in pigments - Red, Yello...

There are three primary colours in pigments - Red, Yellow and Blue. There are two ways to produce more colours:   Physical Mixing: Physically mix colours to produce a new colour

Explain the configuration of a step-by-step switching system, With neat dia...

With neat diagrams explains the configuration of a step-by-step switching system. The schematic diagram for an exchange is specified in figure. Each subscriber is associated to

Database management system, Consider the following instance of the Students...

Consider the following instance of the Students relation, sorted by gpa. sid name login age gpa 53831 Madayan madayan@music 11 1.8 53832 Guldu guldu@music 12 2.0 53688 Smith smith

Define step by step procedure in computer programming, Define Step by Step ...

Define Step by Step Procedure in Computer Programming? The Computer programming is the skill and art of creating a computer program a defined set of instructions in source code

Programming for arithmetic and string operations, Advanced aspects of assem...

Advanced aspects of assembly language programming in this section. A number of these aspects give assembly an edge over high level language programming as far as efficiency is conc

Define compilers with high level programming language, Define Compilers wit...

Define Compilers with High Level Programming Language? All high-level programming language (except strictly interpretive languages) comes with a compiler. Effectively the compi

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