Explain the term overlays, Computer Engineering

Assignment Help:

Explain the term Overlays.

An overlay is an element of program that has the same load origin as several other part of the program. These are used for reduce the main memory requirement of a program. If the problem arises when the size of program exceeds the memory size, so overlays are used. Structure of these programs contains a permanently resident portion, termed as the root.

A set of overlays

To begin with, the root is loaded in memory and specified control for the reasons of execution. Another overlays are overwrites a previously loaded overlay along with similar load origin, this reduces memory requirement of a program. This is also possible to execute programs that size exceeds the memory size.


Related Discussions:- Explain the term overlays

Define entry section and exit section, Define entry section and exit sectio...

Define entry section and exit section. The critical section problem is to design a protocol that the processes can use to cooperate. Every process must request permission to e

Texts in the text elements of the program, Which Texts  in the text elemen...

Which Texts  in the text elements of the program helps in changing the displayed names of variables in the parameters statement. Selection text in the elements of the program

What do you mean by resolution, Q. What do you mean by Resolution? Reso...

Q. What do you mean by Resolution? Resolution is parameter which defines possible sharpness or clarity of a video image.  Resolution is defined as number of pixels which make u

What is the use of urgent pointer in tcp segment, What is the use of urgent...

What is the use of urgent pointer in TCP segment? For accommodation out of band signaling, TCP permits the sender to identify data as urgent, implies that the receiving program

Evaluate total expense of algorithm, Q. Evaluate Total expense of algorithm...

Q. Evaluate Total expense of algorithm? Lastly, the total expense of algorithm is a product of the total number of processors required for computation and time complexity of th

What are spa/gpa parameters (sap memory), What are SPA/GPA parameters (SAP ...

What are SPA/GPA parameters (SAP memory) SPA/GPA parameters are field values saved globally in memory.  There are two ways to use SPA/GPA parmeters: By setting field attrib

How are devices represented in unix, How are devices represented in UNIX? ...

How are devices represented in UNIX? All devices are shown by files called special files that are located in /dev directory. Therefore, device files and other files are named a

What is the difference among character and block devices, a. What is the di...

a. What is the difference among character and block devices? b. Discuss the method to make a Kernel Driver for the PC Speaker. c. Explain the socket structure with the help o

How many words can be acquired by the word universal, How many words can be...

How many words can be acquired by arranging the letters of the word 'UNIVERSAL' in different way? In how many of them  (i)  E, R, S takes place together (ii)  No two of the

The average quiz score for every student, Make a spreadsheet that has on ev...

Make a spreadsheet that has on every line an integer student identification number followed by 3 quiz grades for that student.  Go though that information from the spreadsheet into

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