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
DID YOU KNOW?
5 Best Valentines Day Ideas for Open Source Romantics

Because nothing says "I Love You" Like an open source app. Read More »

Guarding your Data against Cyber Attacks

In this new era of heightened stakes comes an increased need for a comprehensive security strategy. Let's take a look at how cyber-threats have... Read More »

The Great Data Storage Debate: Is Tape Dead?

Tape clearly is on the decline. But remember, legacy systems can hang for a shockingly long time. Read More »

QUICK REFERENCE
Network Fundamentals Study Guide

A network is a group of two or more computer systems or devices, linked together to share resources, exchange files and electronic communications.... Read More »

Computer Architecture Study Guide

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

Webopedia Polls

The trend for the past two years has been for shoppers to spend more online during the holiday season. How do you typically shop for holiday... Read More »