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Path: utzoo!utcsri!utai!dudek
From: dudek@utai.UUCP (Gregory Dudek)
Newsgroups: net.micro.apple
Subject: 80 column screen addressingon the IIe.
Message-ID: <398@utai.UUCP>
Date: Mon, 25-Mar-85 13:59:58 EST
Article-I.D.: utai.398
Posted: Mon Mar 25 13:59:58 1985
Date-Received: Mon, 25-Mar-85 14:21:54 EST
Reply-To: dudek@utai.UUCP (Gregory Dudek)
Distribution: net
Organization: CSRI, University of Toronto
Lines: 20
Summary: 

I am attempting to develop some software for the Apple II line and 
have run into a problem with the Apple IIe.  My software uses the
goto-x-y cursor addressing string extensively ( ^^xy ) to move around
th screen. 
    Although it works fine on the II+ (and compatibles) with several types of
80-column card, it doesn't work on the IIe.  When it tries to go to a
screen location on the IIe, it sometimes moves the cursor to the right place,
and sometimes moves it to a location that is off by one row.
    Since I don't have a IIe myself, I am having a hard time figuring out
what's going on.  I've checked the IIe 80-column manual & have found little
inspiration.  Incidentally, I'm using the "pascal entry point" at $c9aa
to talk to the card.  Anybody got any help to offer?  Please?
    In addition, I have found that on carriage return, the IIe and the II+
do not behave consistently.  In particular, if the 8th bit in on, the
IIe emits a line feed while the II+ does not.  If the 8th bit is off,
the IIe ignores the carriage return (prints a "M") while the II+
does a return and line feed.  What a pain!
    Greg Dudek.
    CSNET: dudek@toronto
    UUCP: {a whole bunch of sites}!utcsri!dudek