NEW 1PCS Atari 7800/2600 Joystick Adapter use W/ Sega Genesis/Megadrive gamepad
The "FIRE" button is typically the "B" button or the "B" + "C" buttons TOGETHER. NOTE THAT YOU WOULD NEED TO PUT YOUR ATARI7800 IN SUCH A WAY THAT THE JOYSTICK ADAPTER HAS ROOM AND NOT TOUCHING THESURFACE.