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From: resnicks@netcom.COM (Steve Resnick)
Newsgroups: comp.os.msdos.programmer
Subject: Re: memory
Message-ID: <1991Mar29.202453.10647@netcom.COM>
Date: 29 Mar 91 20:24:53 GMT
References: <1991Mar29.163548.768@maverick.ksu.ksu.edu>
Organization: Netcom - Online Communication Services  UNIX System {408 241-9760 guest}
Lines: 38

In article <1991Mar29.163548.768@maverick.ksu.ksu.edu> razor@matt.ksu.ksu.edu writes:
>I have a question about memory and extended memories on a pc.  Here is my
>question:
>
>	Up to 640K memory, this is called BASE memory?
>
>	From 640K to 1024K, this is called XMS?  What does XMS stand for?
>
>	From 1024K on up is called EMS?  What does EMS stand for?
>
>In addition, what device drivers does one need to use to access this 
>memory using DOS?

	For memory below 640K it's called BASE memory.
	For memory between 640K-1M is called a kludge - that area is
	reserved for devices and ROM. If there is RAM there it's because
	a memory manager put it there.

	For memory between 1M and 1M+63K is XMS (eXtended Memory Specification)
	this requires a software driver.

	For 1024K on up it's called extended memory. EMS stands for
	Expanded Memory Specification. It's a sophisticated bank-switched
	memory scheme. And it's a BIG KLUDGE to make up for XT's which
	couldn't acces more than 1M of any kind of memory.

 Cheers!
Steve

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