Learn about the technologies behind the Internet with The TCP/IP Guide!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
View over 750 of my fine art photos any time for free at DesktopScenes.com!

[ The PC Guide | Systems and Components Reference Guide | System Memory | Logical Memory Layout ]

Upper Memory Area (UMA)

The way that the PC organizes its use of memory is somewhat confusing--welcome to the most confusing part of that confusion. :^) The upper 384 KB of the first megabyte of system memory, directly above conventional memory, is called the upper memory area or UMA, and it is a very busy place. Confusion abounds regarding this important part of memory. It is important because it is the cause of many system configuration problems, and because it is one of the key enabling factors in allowing you to free up conventional memory for program use.

Next: Upper Memory ROM and RAM

Home  -  Search  -  Topics  -  Up

The PC Guide (http://www.PCGuide.com)
Site Version: 2.2.0 - Version Date: April 17, 2001
Copyright 1997-2004 Charles M. Kozierok. All Rights Reserved.

Not responsible for any loss resulting from the use of this site.
Please read the Site Guide before using this material.
Custom Search