Loading instructions, They are particular register instructions. They are used to load, Basic Computer Science

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.

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages

Loading instructions, Basic Computer Science

Related Discussions:- Loading instructions

Factors and criteria for computer, what are the factors and criteria for co...

Unix, Shell Scriptiong

Memory unit of computer, Memory unit of computer: The Memory unit is ...

Netbooks, Netbooks: Netbooks are special type of Laptop which is very ...

Database, Q1: ER modelling & logical design. An information system is requi...

Types of computer, types of computer on the basis of shape, size & resource...

Explain actual process of ftp applications, Question 1 How do you inse...

Memory, why do computer have internal memory as a part of cpu and the inter...

Discrete math, Below you will find a question the areas of automata. Solve ...

Cathode ray tube monitors, Cathode Ray Tube Monitors (CRT): Monitors d...

Write Your Message!

Featured Services

Online Tutoring

Project Development

Exam Preparation

Course Help

Assignment Help

Popular Subjects

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT