Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!att!hriso!devildog!uxrd17!scottp
From: scottp@uxrd17.UUCP (Scott Popp ())
Newsgroups: comp.sys.apple2
Subject: Apple II+ 80-column access
Message-ID: <1262@devildog.UUCP>
Date: 6 Jun 90 21:55:19 GMT
Sender: nuucp@devildog.UUCP
Reply-To: scottp@uxrd17.UUCP (Scott Popp ())
Organization: AT&T IMS - Piscataway, NJ
Lines: 16


Here's a technical question that I've been unable to get answered.  Maybe
somebody out there knows:
     On an Apple 2+, with an Applied Engineering Viewmaster 80 column card,
how do you access the memory pages in which the text screen is stored.  I
am interested in directly accessing the text screen from assembly language,
in conjunction with ProDOS, but I would even be happy knowing how to do
this from DOS.  I've consulted many technical manuals, but they either have
nothing on 80-column card access, or only mention Apple 2e specific
information.  I seem to recall a general-purpose method of accessing 80-column
memory in ProDOS, but the article didn't go into depths of how to do it.
Any help would be greatly appreciated.

						-Scott Popp
						-attmail!scottpopp
						-201-457-5168