Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!att!cbnews!rock
From: rock@cbnews.ATT.COM (Y. Rock Lee)
Newsgroups: comp.sys.ibm.pc
Subject: Why is DOS limited to 640K?
Message-ID: <10253@cbnews.ATT.COM>
Date: 15 Oct 89 14:12:07 GMT
References: <8909270503.AA28536@euler.Berkeley.EDU>
Reply-To: rock@cbnews.ATT.COM (Y. Rock Lee,55212,cb,1J312E,6148604774)
Organization: AT&T Bell Laboratories
Lines: 12

Why is a plain DOS limited to 640K memory?
I heard of this claim many years ago,
but have never really understood why it has to be so.
Today, I just ran accross the same statement on the Byte magazine.
I am really puzzled (and bothered) by this OLD question.

Can some DOS guru out there kindly explain it to me?
(I am a UNIX person and know very little about DOS internal)
Thanks in advance.

Y. Rock Lee, att!cblph!rock
             rock@cblph.ATT.COM