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 generations, Computer Generations: From the early 1940's to t...

Computer Generations: From the early 1940's to the present, computer scientists have been able to identify clear-cut stages in the development of computer technology. With eac

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

Waterfall model, What is waterfall model?

What is waterfall model?

Heuristic search strategies-artificial intelligence, Heuristic Search Strat...

Heuristic Search Strategies-Artificial intelligence In general speaking, a heuristic search is one which utilizes a rule of thumb to improve an agent's performance in solving p

Storage mechanism of magnetic disk, Storage Mechanism of Magnetic disk: ...

Storage Mechanism of Magnetic disk: Storage Mechanism: Magnetic disk drives contain metal disks that are coated on both sides with an iron oxide recording material. Several

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

Briefly explain formatting tool bar, Question 1 Briefly explain the classi...

Question 1 Briefly explain the classification of the computers Question 2 What is arithmetic logic unit? How it is helpful in CPU Question 3 How do you install a new pri

Explain particle collision in detail, Question 1 Name the different types ...

Question 1 Name the different types of emitters and explain them in brief Question 2 List and explain the Particle Attributes Question 3 Explain Particle Collision

Sequential-access memory device, Sequential-access memory device: A  S...

Sequential-access memory device: A  Sequential-access  memory device reads data in sequence. In other words, information on a serial device can only be retrieved in the same s

Data communication & net centric computing, Suppose there are exactly five ...

Suppose there are exactly five packet switches (Figure 4) between a sending host and a receiving host connected by a virtual circuit line (shown as dotted line in figure 4). The tr

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