User Account

All Pages

Loading instructions, Basic Computer Science

Assignment Help:
They are particular register instructions. They are used to load bytes or sequences of bytes onto a register.
LODS (LODSB) (LODSW)
LAHF
LDS
LEA
LES
LODS (LODSB) (LODSW) INSTRUCTION
Goal: To load sequences of a byte or a word into the accumulator.
Syntax:
LODS
This instruction takes the sequence found on the address specified by SI, loads it to the AL (or AX) register and adds or subtracts , depending on the state of DF, to SI if it is a bytes transfer or if it is a words transfer.
MOV SI, OFFSET VAR1
LODS
The first line loads the VAR1 address on SI and the second line receives the content of that locality to the AL register.
• The LODSB and LODSW commands are used likewise, the first one loads a byte and the second one a word (it uses the whole AX register).
LAHF INSTRUCTION
Goal: It transfers the full content of the flags to the AH register.
Syntax:
LAHF
This instruction is helpful to make sure the state of the flags through the execution of our program.
LDS INSTRUCTION
Goal: used to load the register of the data segment
Syntax:
LDS destiny, source
The source operator must be a dual word in memory. The word related with the largest address is transferred to DS, in other words it is taken as the segment address. The word associated with the lesser address is the displacement address and it is deposited in the register indicated as destiny.
LEA INSTRUCTION
Goal: To load the address of the source operator
Syntax:
LEA destiny, source
The source operator must be situated in memory, and its displacement is placed on the index register or specified pointer in destiny.

Related Discussions:- Loading instructions

Subroutine and functions, Subroutine and Functions:  In a program, it ...

Subroutine and Functions:  In a program, it is often necessary to repeat a statement or group of statements at several points to accomplish a particular task. Repeating the sa

C++, whats the out put of int main(){ int n=310; funcone(n); functwo(&n); ...

whats the out put of int main(){ int n=310; funcone(n); functwo(&n); cout return 0; } void funcone(intn) n=240; } void func two(intn*) { n=120; }

Circuit switching and , Circuit Switching: Many switching techniques a...

Circuit Switching: Many switching techniques are in use. One of them is line or circuit switching in which a communications path is actually established before the message is

History , when was the first computer made

when was the first computer made

What is atm, ATM = Asynchronous Transfer Mode Fast packet switching and mul...

ATM = Asynchronous Transfer Mode Fast packet switching and multiplexing technology (cell-based ) Support the universe of services voice, video and data traffic Provides quality of

Concept of operating system, Concept of operating system: An operating...

Concept of operating system: An operating system is an essential software component of a computer system. The basic  objectives of an operating system are to make the computer

Functioning of a computer , FUNCTIONING OF A COMPUTER: Computers have...

FUNCTIONING OF A COMPUTER: Computers have undergone through a long history of evolution. The evolutionary history is often divided into mechanical and electronic era, with ele

Machine Learning, Hi I have a 8 question machine learning problem sheet due...

Hi I have a 8 question machine learning problem sheet due to the 25th of december. The exercises require knowledge of basic classifiers, logistic regression, naive bayes, mixture o

Arithmetic and control unit, micro routine

micro routine

Mis, #questionexplain strategic mis categories in detail with illustration....

#questionexplain strategic mis categories in detail with illustration..

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd