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

Explain the term- wire and register, What is the difference between wire an...

What is the difference between wire and reg? Net types: (wire,tri)Physical connection between structural elements. Value assigned by a continuous assignment or a gate output.

Arterial puncture - specimen collection, Arterial puncture - Specimen colle...

Arterial puncture - Specimen collection: Arterial puncture:    this requires special skill and usually performed only by physician. The preferred site is radial arter

Measuring and improving cache performance, Measuring and Improving Cache Pe...

Measuring and Improving Cache Performance: 1. Reduce the possibility that 2 different memory block will contend for the similar cache location 2. Additional cache levels

What is fan-out, What is fan-out? Estimate the average count of every "...

What is fan-out? Estimate the average count of every "many" association encountered with the path. Multiply the individual fan-outs who obtain the fan-out of the whole path, wh

Critical capabilities for superior firm performance, What are the critical ...

What are the critical capabilities for superior firm performance in e-commerce? Three firm capabilities which are critical for superior firm performance within e-commerce are:

What is cmp instruction, What is CMP instruction Comparison instruction...

What is CMP instruction Comparison instruction (CMP) is a subtraction that changes only the flag bits; destination operand never changes. A comparison is useful for checking th

Computer data storage, Computer data storage: Computer data storage, f...

Computer data storage: Computer data storage, frequently called memory or storage refers to computer recording media and components, devices that received digital data used fo

Computer networks, distributed & centralized system in computer network

distributed & centralized system in computer network

Linux, Explain about unix file system architecture

Explain about unix file system architecture

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