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

Execution of a machine instruction, Execution of a machine instruction: ...

Execution of a machine instruction: Execution of a machine instruction on modern processors involves a complex sequence of operations with multiple cycles. One instruction cyc

Classify computer system according to capacity, classify computer system ac...

classify computer system according to capacity. how they are different from computer according to the classification of technology.provide the comparative study also.

The form is merely submitted if a user selects either red, Question (a)...

Question (a) What do we signifies by saying that HTTP is a stateless protocol? (b) Explain three ways of working around that statelessness issue (c) Explain with the help

What is raid?explain its levels, Question 1 What is fabric login and what ...

Question 1 What is fabric login and what are its functions Question 2 Explain how is IP SAN different from SAN Question 3 Discuss the product related to Fibre Channel Questio

Project, My son has a project assignment he has problem with. The only thin...

My son has a project assignment he has problem with. The only thing is, it is due in 20 mins. can someone be able to help him? if so, how much is the fee?

Languages used in artificial intelligence, R e presentations/Languages Us...

R e presentations/Languages Used: Many people are taught Artificial Intelligence with the opening line: "The three most essential things in Artificial Intelligence are repres

Identify the critical races, 1. The standard way for debuggers to plant bre...

1. The standard way for debuggers to plant breakpoints in a program in RAM (whatever the processor instruction set) is to save the breakpointed instruction and replace it by a jump

Basic description of a computer system, The main components of a computer ...

The main components of a computer system at a basic level Computer System We call computer system to the whole configuration of a computer, as well as the peripheral units and the

Transaction-based model, Transaction-based model: Here,  the pricing i...

Transaction-based model: Here,  the pricing is based on providing a committed business service, for ex, processing payroll for a global company as part of HR offering and this

Input/output (i/o) unit, Input/output (I/o) unit: This unit provides th...

Input/output (I/o) unit: This unit provides the interface between the computer and the computer peripherals. A computer peripheral is any unit, which is attached to, but is no

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