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From: D Finnigan <dog_cow@macgui.com>
Newsgroups: comp.sys.apple2.programmer
Subject: Re: Detecting if an 80 column card is present (not just in 80 col mode)
Date: Mon, 6 Aug 2012 18:28:33 +0000 (UTC)
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Egan Ford wrote:
> Hello,
> 
> I am looking for any assembly code examples or other tips on how to 
> detect if a system *has* 80 column capability but is not necessarily in 
> 80-col mode.  Targeted systems would be //e, //c, IIgs, and II+ with 
> Videx Videoterm.
> 
> Thanks.
>

Do you have the 80-Column Text Card manuals for the Apple IIe? That explains
how to detect that card on the IIe, a process which should hold true with
all newer models of Apple.