Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!hub.ucsb.edu!peach!mcm
From: mcm@peach.ucsb.edu (Marcelo Mourier)
Newsgroups: comp.sys.ibm.pc
Subject: Unmasking address line A20 in PC AT's
Message-ID: <5932@hub.ucsb.edu>
Date: 11 Jul 90 02:46:14 GMT
Sender: news@hub.ucsb.edu
Reply-To: mcm@peach.ucsb.edu (Marcelo Mourier)
Distribution: usa
Organization: University of California, Santa Barbara
Lines: 10

Hello everybody!

	I need to know how to unmask the address line A20 in a PC AT so that
it's no longer tied low by the hardware.  I know it is done by writing into
the i8240's parallel port, but I don't know the exact procedure.  If anybody
can help me, please send me private email.

Thanks!

mcm@cs.ucsb.edu