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

Cryptography, #questionConsider the one-time pad encryption scheme to encry...

#questionConsider the one-time pad encryption scheme to encrypt a 1-bit message m, and assume m is chosen with uniform distribution from message space M={0,1}. Let E1 be the event

Third generation of computers, THE THIRD GENERATION (1966-1975) ...

THE THIRD GENERATION (1966-1975) The introduction of IBM-360 series of computers in 1965 marked the beginning of this generation. The transistors were replaced by solid

Project, Identify three factors to consider in determining the competitive ...

Identify three factors to consider in determining the competitive value of information technology. Justify the selected factors. Of the factors selected, determine if each fact

Arrays, Write an application that stores at least five different department...

Write an application that stores at least five different department and supervisor names in a two-dimensional array. Allow the user to enter a department name (such as “Marketing”)

DIGITAL LOGIC AND DESIGNING, BCD TO EXCESS-3 USING ONLY NOR GATES

BCD TO EXCESS-3 USING ONLY NOR GATES

Comp 100, I have an account in my www.itlab.com and i have a test and it s...

I have an account in my www.itlab.com and i have a test and it should do tonight, so do you have any one to help me and do this test and it is about excel

Definition of assembler structure, In assembly language code lines have t...

In assembly language code lines have two fractions, the earliest one is the name of the instruction which is to be executed, and the next one are the parameters of the command. For

As, access,excel and ms word/

access,excel and ms word/

Explain the concept of knowledge discovery in database, Question 1 Explain...

Question 1 Explain the concept of knowledge discovery in database Question 2 Discuss the following types of Multidimensional Data Models                    Stars, Snowflakes and

Types of chat room, Types of chat room: Java Chat rooms: The most comm...

Types of chat room: Java Chat rooms: The most common and popular chat scripts are based on java which is object oriented language. Java is freely available and comes with virt

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