MAME - I have no idea
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 I am trying to get MAME games to run, but with ll the ROMs I use I am greeted with this screen 
  
 what does this mean?
 what do I need to do to get the ROMS to work?Thanks 
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 @crimsonblaed 
 You HAVE googled what MAME set you need to run on recalbox?
 If you haven't got the 0.78 set, almost no games will run.
 I have the 0.78 set with all duplicates removed (no one needs 31 Street Fighter 2's or 14 Pac-mans etc) leaving me circa 2200 unique games
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 @RustyMG yes, in fact, I did read the documentation. Although what I was experiencing involved nothing that I read, hence my question. Maybe hold back on the attitude, people don't ask questions if they know the answers.... Anyway, I thought I downloaded the 0.78 set, but clearly not. Do you have a link of the best place to get them from? (and yes I will be googling it again in the mean time) Cheers 
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 @crimsonblaed In the picture, retroarch is using imame4all core, based on mame 0.37 Beta romset not 0.78. 
 Use the correct romset for the core u use or change te core to match your romset.
 https://github.com/recalbox/recalbox-os/wiki/Advanced-Arcade-on-Recalbox-(EN)
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 @crimsonblaed please, read the forum rules before posting. Do not ask for such links! 
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 @crimsonblaed 
 Wow, someone is p***kly......
 There was no attitude. It was simply the most important issue to establish, as 99% of the time, people have problems getting MAME running due to not being aware that they need a specific Romset to match the core they are using.
 Your question was vague with very little information given.
 
			
		 
			
			