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Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!smith@nrl-aic
From: smith%nrl-aic@sri-unix.UUCP
Newsgroups: net.micro
Subject: s100 music board
Message-ID: <16384@sri-arpa.UUCP>
Date: Fri, 3-Feb-84 13:48:00 EST
Article-I.D.: sri-arpa.16384
Posted: Fri Feb  3 13:48:00 1984
Date-Received: Thu, 9-Feb-84 03:12:55 EST
Lines: 19

From:  Russ Smith 

A recent note on the net mentioned an s100 music board which used the
8910 chip to generate three voices as well as interface to Atari
joysticks and/or burgler alarm, etc. Digital Research Computers (of
Texas) sells a six voice s100 board (two chips) for less than $90.
It has four bidirectional 8 bit parallel ports (provided by the chips)
brought out to IC sockets. I've had one for a number of years and
am very pleased with it. The chips don't provide GREAT tonal quality
but that's okay by me. In the past I've used the parallel ports to
scan a 44 key organ keyboard (44 SPST switches, a VERY BIG burglar
system). Worked without a hitch. Right now I've got three of the ports
driving a pen plotter (one I've previously commented about on the net)
and one of the ports reading a, ta-da, Atari joystick (5 SPST switches).
In all cases the chips provided all the interface circuitry. Hooking
things up only required a lot of long wires...(well, actually the organ
required a couple of latches to scan 44 keys with two 8 bit ports).

Russ