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Path: utzoo!linus!philabs!cmcl2!seismo!brl-tgr!tgr!GUBBINS@RADC-TOPS20.ARPA
From: GUBBINS@RADC-TOPS20.ARPA (Gern)
Newsgroups: net.micro
Subject: Need Koala Pad Inferface Info
Message-ID: <263@brl-tgr.ARPA>
Date: Mon, 29-Jul-85 16:33:23 EDT
Article-I.D.: brl-tgr.263
Posted: Mon Jul 29 16:33:23 1985
Date-Received: Wed, 31-Jul-85 22:16:06 EDT
Sender: news@brl-tgr.ARPA
Lines: 15

I am attempting to interface a C64 Koala Pad to an S-100 device of
my own design.  The A-2-D subsystem consists of a NE558 (Quad 555
timer) and a software driver.  This works exceptionaly well with
100K POTS (resolution of 0 to 2K), but not at all well with a Koala
Pad.   What does a Koala Pad put out?   I wish to treat it like
a POT.   A look inside the Koala Pad yields a PC Board with 7
ICs on it.  Does anyone know how it functions?   I am aware of the
recent Byte artical (that violates every S-100 spec there is!!! and 
is overly expensive) on this, it recommends some internal jumpers
on the Apple Koala Pad.  I do not want to go shooting in the dark
and start mucking the guts.  Any help will be appreciated. 

Thanx,
Gern
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