a merger between nintendo's different internal research and development teams led to the creation of nintendo entertainment analysis &amp; development (nintendo ead). miyamoto was the head of it. nintendo ead had about fifteen months to develop "f-zero", one of the launch titles for the super nintendo entertainment system. miyamoto worked on different games on the super nintendo entertainment system. one of them was "star fox". for the game, programmer jez san convinced nintendo to make an upgrade for the super nintendo. this upgrade would allow it to be able to show three-dimensional graphics better. this upgrade was the super fx chip. using this new hardware, miyamoto and katsuya eguchi designed the "star fox" game with an early use of three-dimensional graphics.