Enableing A20 line.

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#2115

From: Joe Huffman
Date: Sun, 09 Sep 1990 04:31

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On many (all?) PC's the A20 line is disabled for compatibility with some
software that requires address wrap around.  So when entering protected
mode and it is desired to gain access to extended memory the A20 line must
be enabled.  How is this actually done?  Code someone either post or mail
me a code fragment or explain how this is done?  

Thanks. 
-- 
joe@proto.com
FAX: 208-263-8772

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Message-ID: <1429@proto.COM>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!proto!joe

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!proto!joe
From: joe@proto.COM (Joe Huffman)
Newsgroups: comp.os.msdos.programmer
Subject: Enableing A20 line.
Keywords: Extended memory, protected mode.
Message-ID: <1429@proto.COM>
Date: 9 Sep 90 04:31:31 GMT
Organization: Prototronics; Sandpoint, Idaho
Lines: 10