Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uwm.edu!lll-winken!ames!amdcad!pepsi!phil
From: phil@pepsi.amd.com (Phil Ngai)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 640K limit
Message-ID: <28809@amdcad.AMD.COM>
Date: 15 Jan 90 20:52:37 GMT
References: <4668.25aed7f2@uwovax.uwo.ca> <1468@blackbird.afit.af.mil> <1990Jan15.030306.19993@sj.ate.slb.com>
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Reply-To: phil@pepsi.AMD.COM (Phil Ngai)
Organization: Advanced Micro Devices, Inc. Sunnyvale CA
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In article <1990Jan15.030306.19993@sj.ate.slb.com> poffen@sj.ate.slb.com (Russ Poffenberger) writes:
|Well, I think you confused it a little more by saying only 386 systems can map
|memory above 1m. The truth is that MOST modern 286 systems these days have
|"Split Memory Addressing". By using some clever address mapping schemes in the
|RAM addressing hardware, the memory that normally falls between 640K and 1024K
|is re-mapped to appear above 1024 as extended memory. (384K worth)

Some of the newer chips sets even allow you to use the memory as EMS.
However, I doubt the original poster is capable of understanding
concepts like remapping. The best answer for him is to go ask the guy
that sold him the board.

--
Phil Ngai, phil@diablo.amd.com		{uunet,decwrl,ucbvax}!amdcad!phil
Peace through strength.