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From: abrams@COMMUNITY-CHEST.MITRE.ORG (Marshall D. Abrams)
Newsgroups: comp.sys.atari.8bit
Subject: 400 keyboard matrix
Message-ID: <8705161415.AA08939@chance.mitre.org>
Date: Mon, 18-May-87 08:47:49 EDT
Article-I.D.: chance.8705161415.AA08939
Posted: Mon May 18 08:47:49 1987
Date-Received: Tue, 19-May-87 01:43:13 EDT
Sender: usenet@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 79

Following is the keyboard wiring to connect to the 22-pin internal
connector in the 400.  I have a picture which I will be happy to send
USPS on request.
	
	KEY	PINS
	---	----
	break	1,9
	inv-video	7,16
	back s	1,17
	>	1,16
	<	1,15
	0	1,14
	9	1,13
	8	1,12
	7	1,10
	6	2,10
	5	2,12
	4	2,13
	3	2,14
	2	2,15
	1	2,16
	esc	2,17
	opt	19,22
	reset	18,22
	=	3,16
	-	3,15
	p3,14
	o	3,13
	i	3,12
	u	3,10
	y4,10
	t	4,12
	r	3,13
	e	4,14
	w	4,15
	q	4,16
	tab	4,17
	retrn	3,17
	*	5,16
	+	5,15
	;	5,14
	l	5,13
	k	5,12
	j	5,11
	h	6,11
	g	6,12
	f	6,13
	d	6,14
	s	6,15
	a	6,16
	ctrl	5,9
	selct	20,22
	start	21,22
	shift	8,9
	/	7,15
	.	7,14
	,	7,13
	m	7,12
	n	7,10
	b	8,12
	v	8,13
	c	8,14
	x	8,15
	z	8,16
	caps	6,17
	space	7,11
	
I made a photo-copy of the keyboard from the back of one of the
manuals and glued it to the keytops where an Atari-specific change was
requied.  The paper does eventually wear off; putting clear tape or
clear plastic spray on top helps.  I also tried painting on the keys,
but tt was less satisfactory.

Sincerely,

 - Marshall D. Abrams, phone: (703) 883-6938
   The MITRE Corporation, 7525 Colshire Drive
   Mail Stop Z670, Mc Lean, VA   22102
   alternate e-mail address: abrams@mitre.arpa