MAME4ALL-PI screen rotation

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    Since it seems that mame4all-pi ignores the retroarch config file, is there a way to rotate the screen 90 or preferably 270 degrees? I see the option to flip x and y axis, which doesn’t help. Is there a way to do this that does NOT involve flipping the screen for EmulationStation and everything else? I have a cocktail style cabinet, and for about 50 MAME games, I want the screen to rotate so that two players can sit across from each other and play. Otherwise, I have ps3 controllers for all of the other games. Anyone know how to accomplish this? As a last resort, I was going to add ADVMAME, which does do screen rotation, and add it into ES as a second MAME emulator with it’s own romset. I understand that ADVMAME is poorer performance-wise compared to mame4all-pi. This is obviously not a very pretty solution though. Does anyone have any other ideas?

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