There’s some confusion over which cables are better or worse for the dreamcast, since there’s a few options to choose from.
So here’s a handy diagram I drew to illustrate the situation more clearly.
You have to click on the image to see the full size, as it clips the right hand side off.
Feel free to use this, but please credit me if you do
Bear in mind that some TVs just “don’t like” s-video, so consider it to be the most risky format, although the results can be absolutely superb if your TV can handle it well.