Hello so I tried
molea_0=bmo %s% > 1 1,uls 1 2 %b1%
It works for one but not for all and I had weird behavior.
And if I understand, i should set one different buffer for each output ? If yes, it will miss buffers.
Anyway, I took the problem the other way : I compiled a specific mame to output 1 instead of 80
And it works now.
But I you have time, I think a tutorial for the bmo will be helpful.
Thank you