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

Processor, The role of array processor

The role of array processor

Number system, convert the following in to binary 108

convert the following in to binary 108

Define virtualization, Question 1 Define virtualization. Discuss the benef...

Question 1 Define virtualization. Discuss the benefits of virtualization. Discuss the benefits of server virtualization Question 2 What is para virtualization? How para vi

Surveying, describe the two fundament purpose of surveying

describe the two fundament purpose of surveying

Explanation pre increment with example, Problem 1 What is precedence of...

Problem 1 What is precedence of operators? How are expressions evaluated using precedences? Defining precedence of operators Explanation of how expressions are evaluat

Output devices, Output Devices: Each output unit of computer system tr...

Output Devices: Each output unit of computer system transmits information from the CPU and converts the electrical pulses to an appropriate output form. A printer, for example

Advantages and disadvantages of e-learning, Advantages and Disadvantages of...

Advantages and Disadvantages of E-Learning: Before we discuss about advantages and disadvantages of e-learning, you should know that e-learning is just another model for learn

Rom, what is rom

what is rom

Classification of database management systems, Question 1: (a) Describ...

Question 1: (a) Describe the three ways of classification of Database management systems (DBMS). (b) Why are System Analysts and Database Administrators needed in compa

Viewing pipeline, Short note on tjis topic

Short note on tjis topic

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