Set Up USB Trackball in Recalbox
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 By the way, I already did a search on this forum and found a whole lot of nothing to help. There is nothing about setting up a trackball with recalbox. 
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 Hello, I received yesterday a PS2 trackball + usb converter from Alieexpress. 
 I plugged on my 3b+.Worked from the first minute using MAME and appropriate games (Centiped, Rampart, etc), nothing to change in parameter. I should now take time to tweak sensibility for each game. Bernard 
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 Hi @bernie-ran, may you share the links of your hardware with us ?  Thanx. Thanx.
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 Yes, @Bernie-ran please share your set up. The trackball I bought has a built in usb encoder, but it does not work in MAME trackball games. Thanks. 
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 Update: I managed to get several of the original trackball MAME games to work with the trackball. The problem was that my build has a few games that say they are MAME games, but are really just bad image copies, so the MAME protocols do not work. I deleted all of the bad copies and kept only the official MAME games. So, I guess the next question is: Is it possible to make the trackball work for say an Atari 7800 version of Centipede, Millipede, Marble Madness, etc. ? 
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 @ranpar1 not if those games were not designed for these kind of controller 
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 @bernie-ran said in Set Up USB Trackball in Recalbox: I should now take time to tweak sensibility for each game. 
 BernardHello @Bernie-ran 
 I think you need to go Mame Menu via TAB or R2
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 Here what I bought (trackball + PS@ to usb adapter); 
 https://www.aliexpress.com/item/Arcade-4-5CM-Illuminated-LED-Trackball-mouse-PS-2-PCB-connector-for-Jamma-mame-game-machines/32270749624.html?spm=a2g0s.9042311.0.0.768e4c4dd7DQR7I saw that promo (cheaper) after I bought: 
 https://www.amazon.fr/TOOGOO-Commande-Accessoires-Sensibilité-Connecteur/dp/B07XKRN35H/ref=sr_1_3?__mk_fr_FR=ÅMÅŽÕÑ&keywords=trackball led&qid=1568361417&s=gateway&sr=8-3&fbclid=IwAR0OwyLjSLU5z-0vEmomHqPxJRSRz1tPXVSMDLCB7zoUMViRqqOr9Vy3TPMMy setup: Raspi3b+, OC1500, External USBKey 128mb, Recalbox 6.0, ps2 to USB converter => trackball. 
 Romset; MAME_2003-Plus_Reference_Set_2018
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 Yes, thanks Acris. 
 I will do that once I’ve finished to clean my MAME romset (again) and sort out all the games I keep.
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 I used this one. Nothing fancy, but it already has USB plug so no need for extra encoders. 
 https://www.amazon.com/RetroArcade-us-ra-track-ball-2-inr2-Track-Ball-60/dp/B00OX0MKD8/ref=sr_1_1?keywords=2+inch+trackball&qid=1568406410&s=gateway&sr=8-1It works good on the MAME games, just was hoping to use it for other systems. 
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 @ranpar1 @Bernie-ran thanks to both of you guys  
 
			
		