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

Define internet and explain its working, Question 1 Define Internet and ex...

Question 1 Define Internet and explain its working Question 2 Explain page format specifiers and page content specifiers of XSL-FO Question 3 Write a note on HTML

Algorithm - programming language, Algorithm : Once a problem has been defi...

Algorithm : Once a problem has been defined precisely, a procedure or process must be designed to produce the required output from the given input. Since a computer is a machine t

Networking.., write advantages and disadvantages of private and public netw...

write advantages and disadvantages of private and public network

Programming Project 1, Programming Project You will implement 2 algorithms...

Programming Project You will implement 2 algorithms to solve the single source shortest paths problem, Bellman-Ford Algorithm and Dijkstra''s algorithm Allowed programming languag

Briefly explain art driven character design, Question 1 What is role playi...

Question 1 What is role playing game? Explain the special design issues for sports games Question 2 What do you mean by collusion? Explain its types Question 3 Wri

Database management, what is the sql command to List all the join condition...

what is the sql command to List all the join conditions or join paths (pairwise) existing between tables.

What are the computational factors, Question 1: (a) Initially, human ...

Question 1: (a) Initially, human information processing was believed to occur in 4 distinct stages. State and describe each of those stages. (b) What are the 3 types of

What are the features of microprocessor ?, Previously two sections the fund...

Previously two sections the fundamentals of the workings and architecture of the central processing unit has been explained. There has been a common look at easy processor architec

Data structure, #question.a tree has 0 off springs at each node. if it had ...

#question.a tree has 0 off springs at each node. if it had a label L, what will be the maximum number of nodes that the tree can have. only an expression involving the number of no

Explanation of characteristics of computers, Problem 1. Briefly explain...

Problem 1. Briefly explain on the characteristics of computers Explanation of characteristics of computers 2. Write a note on Cache Memory Note on Cache Memor

Write Your Message!

Captcha
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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd