I wish Nintendo and similar companies would release the specs of their old platforms under an open license. I think creating an emulator is a great learning experience. I haven't embarked on emulating hardware yet, but have learned a great deal from the work of others in reverse engineering other interesting projects. I still would buy my old SNES games for the Wii U if Nintendo would make their old SNES games freely available and their old specs.
> I wish Nintendo and similar companies would release the specs of their old platforms under an open license.
It wouldn't really matter at this point. By now, the NES [1] and SNES [2] are already some of the best-publicly-documented systems in the world.