What multi taps exist?
There are two official multi tap adapters available one from Electronic Arts and one from Sega, and one third party multi tap adapter made by Gamester. The E.A tap was a small adapter that plugged into both the joypad ports and the four ports were on the front. The Sega multi 4-player adapter plugged into the player 2 joypad port. A lead extended from the port to a small box that had four ports and a sliding selector switch on the top. The selector switch had five settings 1 to 4 and Multi if you were playing a 2 player game you could choose which port to use and multi selected the four player mode five players could be used as a controller could be plugged into port one. Colour stickers were provided with the adapter that could be attached to each of the pads to identify each players controller. One obvious advantage of the sega adapter was that two adapters could be used for eight player games like the Japanese released J League Soccer. Unfortunately they were incompatible with each
