The A button jumps; for the arcade version, this was quite a novel feature. These games, called Orphans, are games that were created and copyrighted by companies that no longer exist. Many such sites that contain files called "Atari Roms" have been shut down since they are direct replicas of games that are currently being sold at stores. While many of these compilations did well, the atari roms and emulators still exist. Back then, nintendo emulation was a fairly new thing and had years of work done to work out all the bugs and add additional support for newer games. It can only be assumed that atari roms are gaining more popularity. Essentially, emulators are completely legal for creation, distribution, and use in the United States. Dozens are placed offline on a yearly basis, but for every one site that gets eliminated, several more appear to surface. Now you can copy the atari games that you download to this directory, and when Stella goes to look for games, it will always know exactly where you want it to find them. You need a controller. The paddles for the machine came with a stock a direction pad and three buttons. An emulator is basically a virtual console that you install on your computer.

At the very top, it says "Folder". You may still come across some trouble because of system error and for this you will need to search on tips to solve your problem. The companies that were bringing this up were trying to see if they could buy the rights, and go after atari rom sites. Simply set up the control pad to give each button a purpose, and then click finish.