User Account

All Pages

stack instructions, Basic Computer Science

Assignment Help:
These instructions permit the use of the stack to store or recover data.
POP
POPF
PUSH
PUSHF

POP INSTRUCTION
Purpose: It improves a portion of information from the stack
POPF INSTRUCTION
Purpose: It extracts the flags stored on the stack
POPF
This command moves bits of the word stored on the superior part of the stack to the flag register.
PUSH INSTRUCTION
Purpose: It puts a word on the stack.
Syntax:
PUSH source
The PUSH instruction reduces by two the value of SP and then transfers the data of the source operator to the new resulting address on the just modified register.
The decrement on the address is due to the fact that when adding values to the stack, this one raises from the greater to the smaller segment address, consequently by subtracting 2 from the SP register what we do is to raise the size of the stack by two bytes, which is the only amount of information the stack can handle on every input and output of information.
PUSHF INSTRUCTION
Purpose: It situates the value of the flags on the stack.
Syntax:
PUSHF
This command reduces by 2 the value of the SP register and then the content of the flag register is relocated to the stack, on the address indicated by SP.
The flags are gone stored in memory on the similar bits indicated on the POPF command.

Related Discussions:- stack instructions

Subroutine , Subroutine :   A subroutine  is a type of subprogram, a pi...

Subroutine :   A subroutine  is a type of subprogram, a piece of code within a larger program that performs a specific task and is relatively independent of the remaining code.

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.

Characterizations of artificial intelligence, Characterizations of Artifici...

Characterizations of Artificial Intelligence Artificial Intelligence is a typical science to describe, because it has fuzzy borders with, psychology, computer science, mathemat

operator, what is operator and operator associativel

what is operator and operator associatively

Explain the term "algorithmic delay", QUESTION a) What is Time Division...

QUESTION a) What is Time Division Multiplexing (TDM), illustrate your answer with a diagram b) Describe four types of RTCP messages c) i) What is silence compression in I

Looping statement, Looping Statement:  The purpose of a loop structure is...

Looping Statement:  The purpose of a loop structure is to repeat certain tasks until some condition is satisfied. Several variations of a loop structure are available in each pro

The terms ''row-major order'' and ''column-major order", What is meant by t...

What is meant by the terms 'row-major order' and 'column-major order'? Ans: (i) Storing the array column by column is called as column-major order and storing the array row by

Probability, Mike sells on the average 15 newspapers per week (Monday – Fri...

Mike sells on the average 15 newspapers per week (Monday – Friday). Find the probability that 2.1 In a given week he will sell all the newspapers

Sequential writing in fcb files, Previous to we can perform writing to the...

Previous to we can perform writing to the disk it is essential to define the data transfer region using for this end the 1AH function of the 21H interruption. The 1AH function does

Pseudocode, Design a program that will read a file of sales records and pro...

Design a program that will read a file of sales records and produce a sales report. Each record in the file contains a customer’s ID, name, a sales amount, and a validated GST code

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