Joystick and MIDI interface for Soundblaster cards:

With the introduction and general proliferation of the Soundblaster card and its derivatives, almost any PC can be beefed up with a number of new multimedia functions. While some functions like the wavetable synthesizer and the soundsampler are only found internally in the PC, others are available that are typically used in combination with peripheral equipment. The interface described in this article enables signals on the multifunctional joystick connection to be converted into a number of standard connections and signal levels. Any joysticks and MIDI equipment you may have available may then be hooked up in a simple manner.