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

Answering systems- database query, Answering Systems / Database Query T...

Answering Systems / Database Query There are a large number of opportunities for get faster through parallelizing a Database Management System (DBMS). However, the actual purpo

What does realized mean, Realized mean that the component has been painted ...

Realized mean that the component has been painted on screen or that is prepared to be painted. Realization can take place by invoking any of these methods. setVisible(true), show()

Corrosion, Explain the mechanidm of the rusting of iron on the basis of ele...

Explain the mechanidm of the rusting of iron on the basis of electrochemical corrosion?

ip address and port number at the remote host, How many TCP connections ar...

How many TCP connections are in the "Established" state? Contain relevant output. For one of the established TCP connections, what are the IP address and port number at the remote

Add a byte number from one memory location, Add a byte number from one memo...

Add a byte number from one memory location to a byte from subsequent memory location and put sum in the third memory location. Also save carry flag in the least significant bit of

Physical characteristics and access mode of disk drive, Q. Physical charact...

Q. Physical characteristics and access mode of disk drive? Access Time: Access time is time needed between requests made for a read or write operation until the time data are

Define clock rate, Define clock rate? The clock rate is given by, R=1/P...

Define clock rate? The clock rate is given by, R=1/P, where P is the length of single clock cycle.

Which objects are independent transport objects, Which objects are independ...

Which objects are independent transport objects? Domains, Data elements, Tables, Technical settings for tables, Secondary indexes for transparent tables, Structures, Views, Ma

Implement that function using only nand gates, Q. Find simplified function ...

Q. Find simplified function F and implement that function using only NAND gates. 1.  F(A,B,C) = (A+B) (A'+B+C') (A'+B'+C') 2.  F (A,B,C,D) = A'B'C'+B'CD'+A'BCD'+AB'C' 3.

What is random access memory, What is random access memory(RAM or MAIN MEMO...

What is random access memory(RAM or MAIN MEMORY) and mention its types? The main memory in the central storage unit in a computer system. It is relatively large and fast memory

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