Since Pong is a tag at main site SO and not a tag on gamedev, is the preferred place to ask about Pong on SO even if Pong is game development? I saw that Pong runs on some FPGA and asked about it it but I think it got too localized.
Pong as in the game pong? There probably isn't a tag for it because nobody has asked any questions about it.
As far as progrmaming questions go, see the faq. If a game developer will likely give you a better answer than the audience of SO, feel free to ask it here. Most game developers probably don't deal with a lot of embedded hardware, or whatever FGPAs are classified as.