Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » S »

segmented address space

An address space logically divided into sections, called segments. To access a particular memory location, a program must specify both the segment number and the offset within that segment. In contrast, a flat address space consists of simple memory addresses that start at 0 and increment to the maximum address.

Intel's 16-bit x86 architecture uses a segmented addressing model, and consequently so do DOS and older versions of Windows. Starting with 80386 microprocessor, however, the x86 architecture supports a flat addressing architecture. Newer versions of Windows, including Windows 95, Windows 98 and Windows NT, use a flat addressing scheme. The Mac OS has always used a flat addressing model.

In some cases, it's necessary to convert from one addressing model to another. This is called thunking.







TECH RESOURCES FROM OUR PARTNERS
LATEST ARTICLES
8 Agenda Apps to Help Students Stay Organized

Webopedia's student apps roundup will help you to better organize your class schedule and stay on top of assignments and homework. Read More »

20 Ways to Shorten a URL

If you need to shorten a long URL try this list of 20 free online redirection services. Read More »

Top 10 Tech Terms of 2015

The most popular Webopedia definitions of 2015. Read More »

STUDY GUIDES
Computer Architecture Study Guide

This Webopedia  study guide describes the different parts of a computer system and their relations. Read More »

Network Fundamentals Study Guide

Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »

The Five Generations of Computers

Learn about each of the five generations of computers and major technology developments that have led to the current devices that we use today. Read More »