Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP 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 SmithA 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