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

Specify the steps to creating a powerpoint presentation, FUNDAMENTALS OF CO...

FUNDAMENTALS OF COMPUTERS 1. Describe the importance of video in multimedia. What are some of the tips to keep in mind while making video for the web? 2. Specify the steps t

Grammar, Given the following grammar: -> [ , ] | -> | { } -> a...

Given the following grammar: -> [ , ] | -> | { } -> a | b | cwhich are the strings generated by the grammar? Show the parse tree(s). a). { [ a , b ] }b). [ { a } , b ]

Readymade versus custom-made software, READYMADE VERSUS CUSTOM-MADE SOFTWAR...

READYMADE VERSUS CUSTOM-MADE SOFTWARE Nursing care software can be in two forms. Software can be custom-made with the help of a computer programmer, suited for a client with v

Computer architecture, Write control sequence for adding the content of the...

Write control sequence for adding the content of the memory location whose address is at memory location pointed by immediate number NUM to register R1. Assume the number NUM is pr

Random reading and writing and Closing a fcb file, The 21H function and the...

The 21H function and the 22H function of the 21H interruption are the ones in charge of realizing the random readings and writings in that order. The random register number and the

Telecommunications network, Telecommunications network: "A telecommuni...

Telecommunications network: "A telecommunications network, at its simplest, may be regarded as comprising a transmission network, an arrangement of transmission paths and swit

Output options to various multimedia, The various systems (computer, softwa...

The various systems (computer, software and output devices) that are available have different limitations for output that is cartographic in nature. Some systems are CAD, GIS limit

Memory management, Memory Management: The purpose of the memory mana...

Memory Management: The purpose of the memory management system is to load programs into memory in such a way as to give each program loaded  the memory that it requires for

Digital design system, Manipulate the following Boolean expression in such ...

Manipulate the following Boolean expression in such a way so that it can be implemented using exclusive-OR and AND gates only. AB''CD'' + A ''BCD'' + AB''C''D + A''BC''D

Accessing other computers, Accessing Other Computers The advanced netw...

Accessing Other Computers The advanced networking features of Windows combined with the easy to use user interface make the task of sharing information with other computers/us

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