The tone of your post is quite demanding. You don't really need anything but time and endurance. Lots of both. First you get the datasheets of the sound chip, then make up some hardware, buy the parts, assemble it then look at a lot of source of emulators for that sound chip (iirc MAME has an excellent APU emu), write some software, beta test it and release it. Done. Sounds simple. Isn't quite as simple. I should know.[me=nILS Podewski]looks at bugfight[/me]