Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!ukc!slxsys!stevem
From: stevem@specialix.co.uk (Steven Murray)
Newsgroups: sci.electronics
Subject: Defender sound effects
Summary: Defender sound effects
Keywords: sound,d/a
Message-ID: <1991May3.160305.15500@specialix.co.uk>
Date: 3 May 91 16:03:05 GMT
Organization: Specialix International, London
Lines: 22


Sound Effects

Back in the Hack-Em-Up days I worked with video arcade games.
The sound effects in some of these games were usually performed
by a dedicated micro running a couple of sound effects chips.

The 'Defender' game by Williams (the pinball people) was an
exception - they had a 6802 micro running an 8 bit D/A converter 
 - and that was all!  Their clever assembly lanugauge code produced
the right waveforms in software.  Being fascinated I copied the
ROM, have disassembled and labeled it, and have translated a couple
of sound effects into 8051 assembler (my native language :-)

Anyway, it was a fun weekend project - anyone want the code? Email me.
Anyone else played with sound effects from stand alone microprocessors
like this?  Post so we can swop hints.
-- 
Steven Murray
uunet!slxsys!stevem  stevem@specialix.co.uk
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