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Someone handed me a a Sega Saturn without a video cable this evening (thanks Craigslist).  Wanting to add it to my 32bit gaming system collection, this problem would have to be remedied. The one beneficial fact is that generally, the audio/video cables for game systems are purely passive. That is, the system will have pins on the A/V connector for all of the supported outputs and it is just a matter of routing the right video connector and you are set. Some designers get clever and add some simple components to let the system identify what kind of cable is attached, such as the original Microsoft Xbox, which can then be used to add additional functionality to the device like a reset button. Here is the pin diagram for the Saturn’s A/V connector. While looking for it, I accidentally found a PIC16F630 based hack to allow you to toggle between 50/60Hz video output (PAL/NTSC).

 
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