A86: Re: Keypresses

To: <assembly-86@lists.ticalc.org>
Subject: A86: Re: Keypresses
From: "David Phillips" <david@acz.org>
Date: Mon, 22 Feb 1999 15:04:11 -0600
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org


I don't think that's possible.  The hardware works by you writing the row to
check to the port, then it returns the column for that row.  The rom's
battery test routine works by waiting for a keymask to expire (if that helps
you any).  If multiple keys in one column were pressed, how would that work?
You have to check all rows.

>
>Does anyone know if there is a way to find out what column a key is
>pressed in without specifying the row?

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