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

Fundmantal of computer, what is computer?

what is computer?

Printers, Printers: Printers: Printers exist in a variety of forms:  ...

Printers: Printers: Printers exist in a variety of forms:  Line Printers: These have been widely used for many years in large computer installations. They are design

Flowcharts, what is a dry running of flow chart?

what is a dry running of flow chart?

Message quality and quantity, Message Quality and Quantity: Quality of...

Message Quality and Quantity: Quality of transmission is a very important .consideration in telecommunication. Voice communication can use a narrow bandwidth, which means the

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

Assignment, Assignment of computer science

Assignment of computer science

Multiple allocations, You can also allocate a single value to several varia...

You can also allocate a single value to several variables at the same time. For instance: X=y=z =1 Now, an integer object is generated with the value 1, and all three variables are

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.

Asymptotic notation, Explain in brief the asymptotic notations

Explain in brief the asymptotic notations

Types of software interface, different types of software interfaces which f...

different types of software interfaces which falls in different categories

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