Define com programs, Computer Engineering

Assignment Help:

Q. Define COM Programs?

A COM (Command) program is binary image of a machine language program. It is loaded in memory at the lowest available segment address. Program code starts at an offset 100h, the first 1K locations being occupied by IVT.

A COM program keeps itsdata, code and stack segments within same segment. Because the offsets in a physical segment can be of 16 bits hence size of COM program is limited to 216 = 64K that involvesdata, code and stack. The subsequent program displays a COM program:

; Title add two numbers as well as store result and carry in memory variables.

; name of segment in this program is chosen to be CSEG


Related Discussions:- Define com programs

What is the main reason to encrypt a file, The main reason to encrypt a fil...

The main reason to encrypt a file is to ? Ans. The main purpose to encrypt a file is to secure that for transmission.

What are the characteristics of sram, What are the characteristics of SRAM?...

What are the characteristics of SRAM? SRAM are fast They are volatile They are of high cost Less density

Computer graphics, list out of merit and de-merit plasma display

list out of merit and de-merit plasma display

Enumerate about the specialised hardware, Enumerate about the Specialised h...

Enumerate about the Specialised hardware Specialised hardware such as protected memory or cryptographic memory module for storing and protecting the keys proves to be a good s

Difference b/w non-relocatable and relocatable programs, Differentiate bet...

Differentiate between non-relocatable and relocatable programs. A non-relocatable program is one which cannot be executed in any memory area other than the area starting at i

What is assembly condition codes, Condition codes are the list of possible ...

Condition codes are the list of possible conditions that can be tested through conditional instructions. Typical conditional instructions have: conditional branches, conditional ju

Invariant of the class, What are the conditions that have to be met for a c...

What are the conditions that have to be met for a condition to be an invariant of the class? Ans) ? The condition should hold at the end of each constructor. ? The conditi

Add references dialog box, What is the difference among "using System.Data;...

What is the difference among "using System.Data;" and directly adding the reference from "Add References Dialog Box"?  When you compile a program using command line, you add th

Database, how create database design for pharmacy by diagram and query

how create database design for pharmacy by diagram and query

Discuss the advantages of electronics data exchange, Discuss the advantages...

Discuss the advantages of Electronics Data Exchange (EDI). Advantages of EDI: Electronics Data Exchange's saves needless re-capture of data. It leads to faster transfer of d

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