I'm looking for a movie-It must have been made during the late 70s or sometime during the 80s. It’s about a guy who gets zapped by a computer and transported to a different dimension. He has a Katana sword, and meets a friend who is this green guy, with some kind of pod gun. A scientist transported to this dimension before the “hero”, and sets up a despotic rule with the creation of a black powder pistol, and the use of his scientific knowledge. This is all I remember.

I'm guessing it might be Prisoners of the Lost Universe.

That's it! Thanks!