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

Write the steps for applying animations, Question Write the steps for a...

Question Write the steps for applying animations. Prepare a presentation of 5 slides in a creative for any topic in your semester (research methods/Business strategy/Financial

Interpreter, Interpreter: An interpreter is a program that translates...

Interpreter: An interpreter is a program that translates each statement in the programming language into machine code and runs it.  Such an arrangement means that to run the

Classification of database management systems, Question 1: (a) Describ...

Question 1: (a) Describe the three ways of classification of Database management systems (DBMS). (b) Why are System Analysts and Database Administrators needed in compa

Kirchhoff’s law, A car battery is of 12 V. Eight dry cells of 1.5 V each ...

A car battery is of 12 V. Eight dry cells of 1.5 V each connected in series can give 12 V. But such cells are not used in starting a car. Why?

Disaccharide sugars, Disaccharide Sugars: Disaccharide - Carbohydrate made...

Disaccharide Sugars: Disaccharide - Carbohydrate made up of two monosaccharides (a sugar dimer) Condensation reaction between 2 monosaccharides Linkage between

Explain uses of system call and its major types, In computing, a system cal...

In computing, a system call is how a program asks for a service from an operating system''s kernel. This may contain hardware related services (for example accessing the hard disk)

Need of artificial intelligence, Need of artificial intelligence: Artif...

Need of artificial intelligence: Artificial Intelligence may be seen as just the latest tool in the philosopher's toolbox for answering these all questions about the behavior o

Central processing unit, The Central Processing Unit : Central Processing U...

The Central Processing Unit : Central Processing Unit (CPU) is the brain of the computer. The intricate electronic circuitry of the CPU performs the computer's tasks of handling d

Constant bit rate atm theory, For the connections that request a static amo...

For the connections that request a static amount of bandwidth that is continuously available during the connection lifetime. Is intended to support real time applications requiring

ASP.net, educational website project

educational website project

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