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From: dbrooks@penge.osf.org (David Brooks)
Newsgroups: comp.sys.atari.st
Subject: TOS quirk with ALT key
Message-ID: <17625@paperboy.OSF.ORG>
Date: 2 Jan 91 04:34:14 GMT
Sender: news@OSF.ORG
Reply-To: dbrooks@osf.org (David Brooks)
Organization: Open Software Foundation
Lines: 18


I was trying to do something with 8-bit keyboard input, and use the
ALT key to signal "hi-bit on" I'm reading with Bconin.  The general
idea was to see if the translated character is zero; if so, and
kbshift indicates ALT, I would re-translate the scancode using the
standard keyboard mapping tables and plug in the top bit.

Mostly, this works fine.  But the keys in the top row, between "1" and
"=", get 0x76 arbitrarily added to their scancodes before being
returned to me.

Of course, once I knew this I could compensate for it.  But does
anyone know the rationale for dickering with something as basic as the
scancode?  It's the 11/86 ROM, if it matters.
-- 
David Brooks				dbrooks@osf.org
Systems Engineering, OSF		uunet!osf.org!dbrooks
In Memoriam: Chris Naughton, aged 16, killed by a drunk driver Dec 22, 1990