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

Computer architecture, speed up factor for superscalar architecture

speed up factor for superscalar architecture

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,

Discrete Math, 3. Let f, g: R?R, where g(x) 1 - x + x2 and f (x)=ax + b. I...

3. Let f, g: R?R, where g(x) 1 - x + x2 and f (x)=ax + b. If (g ? f )(x)= 9x2 - 9x + 3, determine a, b.

What are the tasks of ALU and their subcomponents, ALU’s tasks and their s...

ALU’s tasks and their suitable subcomponents: Addition and subtraction these two tasks are carried out by constructs of logic gates, such as half adders and full adders. While they

Why learning of Assembly language is beneficial?, The first reason to work ...

The first reason to work with assembler is that it offers the opportunity of knowing more the operation of your PC, which permits the development of software in a more constant man

Time and space tradeoffs in search, Time and Space Tradeoffs in search-arti...

Time and Space Tradeoffs in search-artificial intelligence: In practice, you need to stop your agent at some stage if it has not searched a solution by then. However, if we can

Explain data transfer and arithmetic operations, Question 1 Convert the fo...

Question 1 Convert the following binary numbers to decimal 101110 1110101 110110 101010 110010 Question 2 Explain CPU module and types of transfers betwe

Outdoor patient department features - receptionist module, Outdoor Patient...

Outdoor Patient Department (OPD) Features The following modules can be developed for various areas and workers. A receptionist Module Receptionist updates all bas

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

Cathode Ray Tube Monitors (CRT): Monitors display what is going on in your computer. They can run at various resolutions. It is the part of computer which looks like a TV set.

Finite automata, find the regular expression of(a/?)(a/b)?

find the regular expression of(a/?)(a/b)?

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