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

BARCODES, WHY ISN''T THE PRICE STORED ON THE BARCODE

WHY ISN''T THE PRICE STORED ON THE BARCODE

C++, You are to code a C++ program that will read the file IntList into an ...

You are to code a C++ program that will read the file IntList into an integer array. There are no more than 20 integers in the file. After all of the data is read into the file,

Opcode and operands, Opcode and operands: Let us further assume that o...

Opcode and operands: Let us further assume that our computer can process only two-digit decimal numbers, i.e. there can be a maximum of two operands each of a maximum of two d

Explain the process of fetching a word from the memory, Question 1 Explain...

Question 1 Explain the functional units of a basic computer with a neat diagram Question 2 Explain how you can get 1's complement of a given binary number? Also explain 1'

How Round robin scheduling algorithm is useful than others ?, Round robin (...

Round robin (RR) is one of the simplest, oldest, fairest and most extensively used algorithms. • In the round robin scheduling, processes are posted in a FIFO manner but are given

About the faculty posts, is there any oppurtunity for a mca to teach mcasub...

is there any oppurtunity for a mca to teach mcasubjects online

Software, Software: A computer system consists of two parts - hardware...

Software: A computer system consists of two parts - hardware and software. The first part, computer hardware, refers to all the visible components of the computer system:  key

Software development, requirement analysis and specification for online vot...

requirement analysis and specification for online voting

Hotel database, Create a database,show all ojectives and give a fruitful in...

Create a database,show all ojectives and give a fruitful introduction and also state how it will be implemented

Explain the probability and non-probability sampling methods, Question 1 W...

Question 1 Write a program to read four floating point numbers and find their sum and average. Question 2 Differentiate string constants and character constants with one exam

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