What is base register addressing, Computer Engineering

Assignment Help:

Q. What is Base Register Addressing ?

An addressing technique in which content of an instruction specifies base register is added to address field or displacement field of the instruction. (Refer to Figure below).The displacement field is taken to be a positive number. For illustration if a displacement field is of 8 bits then a memory region of 256 words beginning at address pointed to by base register can be addressed by this mode. This is same as indexed addressing scheme besides that role of Address field and Register is reversed. In the indexing Address field of instruction is fixed and index register value is changed while in Base Register addressing Base Register is common and Address field of the instruction in different instructions is changed. In this particular case:

EA = A+ (B) 

D = (EA)

(B) Refers to the contents of a base register B.

1861_What is Base Register Addressing.png

Contents of the base register can be changed in the privileged mode only. No user is permitted to alter the contents of the base register. Base-addressing scheme offers protection of users from one another.

This addressing technique is generallyused to relocate the programs in memory particularly in multiprogramming systems in which only value of base register needs updating to reflect beginning of a new memory segment. 

Like index register a base register can be a general-purpose register or a special register reserved for base addressing.


Related Discussions:- What is base register addressing

Concurrently read exclusively write, Q. Concurrently read exclusively write...

Q. Concurrently read exclusively write? It's one of the models based on PRAM. In this model, processors access the memory location simultaneously for reading whereas exclusivel

Explain bottom up parsing, Explain Bottom up parsing. Bottom up pars...

Explain Bottom up parsing. Bottom up parsing: This parse attempts to increase syntax tree for an input string by a sequence of reduction. If the input string can be decreas

Transport layer, time to left (TTL) in transport layer

time to left (TTL) in transport layer

Explain about the term e-brokerage briefly, Explain about the term E-broker...

Explain about the term E-brokerage briefly. An e-brokerage is an investment house which allows you to buy and sell stocks and acquire investment information through its Web sit

I2c protocol bus , I²C TECHNOLOGIES The I2C protocol bus is two bi-dire...

I²C TECHNOLOGIES The I2C protocol bus is two bi-directional wires, serial data (SDA) and serial clock (SCL), that transmit information between the devices connected to the bus.

Flowchart, draw the flowchart for operator overloading in c++

draw the flowchart for operator overloading in c++

Split bus operation - universal serial bus , Split Bus Operation - universa...

Split Bus Operation - universal serial bus :   USB 2.0 devices utilize a special protocol in the reset time that is called "chirping", to negotiate the high speed mode

Communications and synchronization, Communications Parallel tasks class...

Communications Parallel tasks classically need to exchange data. There are many ways in which this can be accomplished, such as, through a network or shared memory bus. The act

What do you mean by perfect shuffle permutation, Q. What do you mean by Per...

Q. What do you mean by Perfect Shuffle Permutation? Perfect Shuffle Permutation: It was proposed by Harold Stone (1971). Consider N objects each is represented by n bit number

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