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Article #25829

keyboard driver on ST

#25829
From: donald
Date: Thu, 19 Mar 1987 22:03
29 lines
1740 bytes
If you hold down the shift key and type a couple of letters fast
e.g. L and P, sometimes you will get a phantom null (^@) keypress
between the letters.  Has anyone else encountered this?  The easiest
(and safest) way of doing this is to get into a command line interpreter
and try it; you should get a line like:

{d} LPLPLPLPL^@PLPLPL^@P

if you type fast enough.  (I tried it with Mark Williams shell)

I first met it while typing HLP in me3.7 using the shift key instead of
caps lock.  What happened was the help screen would get called up! I
suppose this was because the help function was bound to some function
key, and the phantom keypress had the upper 8 bits of the word set to some
garbage.  Actually sometimes the computer crashed, and I lost about
fifteen minutes typing the first time; most irritating. 

I assume the driver software could not keep up with my typing and the
extra processing involved with the shift key press (see, even 68000s can't
keep up with my typing:- has anyone had this sort of problem on a Cray? 8^).
Any comments?  Atari?


-- 
/*
 * Tim Bissell ... the six million donald man ...
 * 			           donald@uk.ac.warwick
 *            ...mcvax!ukc!warwick!donald
 */
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watnot!watmath!clyde!rutgers!seismo!mcvax!ukc!warwick!donald
From: donald@warwick.UUCP
Newsgroups: comp.sys.atari.st
Subject: keyboard driver on ST
Message-ID: <509@ubu.warwick.UUCP>
Date: Thu, 19-Mar-87 17:03:03 EST
Article-I.D.: ubu.509
Posted: Thu Mar 19 17:03:03 1987
Date-Received: Sun, 22-Mar-87 19:30:20 EST
Organization: Need-to-know Software/The Donald project
Lines: 29
Keywords: keypresses,DRI software