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

Virtual manufacturing system, Virtual Manufacturing System Virtual manu...

Virtual Manufacturing System Virtual manufacturing system or VMS is a synthetic, integrated manufacturing environment, developed by using information technology tools, exercise

Develop a regular expression for integer and identifier, Develop a regular ...

Develop a regular expression for Integer and Identifier (i) A regular expression for integer is [+ | -] (d)+ (ii) A regular expression for identifier is l(l | d)*

Convert ascii code to its bcd equivalent, Convert ASCII code to its BCD equ...

Convert ASCII code to its BCD equivalent. This can be achieved by simply replacing bits in upper four bits of byte by four zeros. For illustration the ASCII '1' is 32h = 0010B. By

Assembler directives, Assembler directives: An assembler directive is ...

Assembler directives: An assembler directive is a statement to give direction to the assembler to perform the task of assembly process. Assembler directives control organizati

How do we bind keys to menus for shortcuts in gimp, Make ensure that "Use d...

Make ensure that "Use dynamic keyboard shortcuts" option in "Interface" tab of Preferences dialog is enabled, then go to the menu selection you are interested in. Keeping it select

What is tcas, tCAS is the number of clock cycles required to access a parti...

tCAS is the number of clock cycles required to access a particular column of data in SDRAM. CAS latency is the column address strobe time, sometimes referred to as tCL.

Explain short note about molap?, Classic form of OLAP is called as MOLAP an...

Classic form of OLAP is called as MOLAP and it is often known as OLAP. Simple database structures like time period, product, location, etc are used. Functioning of each and every d

Can we delete a domain, Can you delete a domain, which is being used by dat...

Can you delete a domain, which is being used by data elements? No.

Types of reasoning - first-order logic, Types of reasoning - First-order lo...

Types of reasoning - First-order logic: Atleast five types of reasoning can be acknowledged here. • Firstly, why and how do we will think for the killer usually left a silk

What are the types of calendars in a single interface, What are the types o...

What are the types of calendars in a single interface? Member Event calendar helps users manage their personal time, Kept track of meetings with others, and so on. Tea

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