Well, for the last year or more there has been a lot of discussion about 2 or more button joystick mods on AA, and new and converted software. With the release of the TOP NOTCH shooter LAST SQUADRON which supports 2 button joysticks, I finally decided to mod my original Genesis/Megadrive controller (I no longer even own a Megadrive/Genesis anyway and will get controller with one if I ever buy again) to have all 3 buttons available as there are even a few hacked classic games that support 3 buttons now. Then I started down loading dozens of converted games from uploads and links in the Joy 2B+ thread on AA: https://atariage.com/forums/topic/278884-2-button-joystick/#comments Buttons 2 and 3 just use the Paddle POT0 and POT1 inputs via connection to +5v pin 7 through 330 Ohm resisters This bit is unnecessary with the Genesis controllers as the 330 ohm resisters are already in place once the IC is bypassed. I merely copied the mod from the photos on page 13, post 317 of this thread, making only one mistake going off the picture that didn't allow the controller to go right, then connected to the correct bypass where the multi-plexing 74HC157N chip that was removed. These images are lifted from the post on AA and not mine. Though I made a couple of adjustments like the two jumper wires going to pin holes right next to each other I just soldered the pads on the other side together instead of using wire. Wires 5 and 7 (coming from the cable and attaching to the PCB (they are clearly marked 5 and 7 where the cable wires solder to the board) have to be swapped as well (shown swapped in the second picture) and just the five connections jumping the proper connections across where the removed IC's pin holes are left. Lots of great games have already been hacked to support 2 or more buttons, so no more space bar, or second controller, or direction pad activation of special weapons, etc. Just multiple buttons instead for better arcade action.Literally dozens and dozens of hack conversions so far and probably about a dozen new games are out or on the way soon with two button options. For example, there is a 2-button hack of Commando now, so you can use the second button to throw grenades instead of pull down/back on the joystick while holding the button to accomplish the grenade toss! Now the game really does play as good as the 7800 version. Another, Screaming Wings, by Red Rat received a 2020 version with some slight graphic improvements, and improved game play including the a second button to simply push to do a loop and avoid enemies instead of reaching for the space bar and having loss of control for a second to accomplish it in a fast paced game. A HUGE game play improvement there with a quick avoidance tactic and no loss of control and possible tragedy while chancing to reach for the space bar, or mostly just never using the move and having a lot more collisions and much shorter games. Star Trek Strategic Operations Simulator has 2 and 3 button versions now. The 3 button version move the fire Photon from the down directional to the B button, and the Warp-speed that use to be a combination of fire and down is now the C button. I've already doubled my high scores in these games with just one evening with them. This is a simple mod for even the beginner with a soldering iron, solder and de-soldering braid which is all I used in this mod. But just to make it totally clear, unlike the picture alone that caused me to make one error, the jumper wires are as follows: pin 1-pin 13, pin 3-pin 4, pin 6-pin 7, pin 9-pin 11 and pin 10-pin 12. That's all there is too it. This is only for the older, original 3-button controller model number 1650 (imprinted on backside) made in China, with the DIP mount 74HC157N. Newer ones have a surface mount multi-plexing IC and different layouts. Save the 74HC157N IC; 74LS157N IC's are used in most Atari equipment somewhere on their boards and the newer HC versions are pin compatible with less latency and power consumption to boot! Of course there are other mod options from complete DIY arcade joysticks to just modding regular Atari after market 2600/800 that happen to have two buttons that normally work as the same button, to a mod for 7800 European style pads and even the original and totally uncomfortable 7800 prolines.