oops got me thinking now...
i'm going to have a CP with just spinner and buttons
and also another CP with trackball and buttons.
so how to workaround OK in that case?
This is a little hacky, but if you're using a programmable keyboard encoder (like the I-PAC), you can set the inputs for two of your buttons to be the "O" and "K" keys, then set those keys as player button defaults in MAME.
Hypothetically speaking... if a person were to do this I might, hypothetically pull a Jay and Silent Bob on them, fly to their house and beat the living crap out of them. Everyone just went through this lengthy thread that basically spells out, word-for-word "o and k buttons are NOT needed to bypass ok" and that is your suggestion? Try to keep up man, there isn't a special class in the school of mame.

For those of you not paying attention, you should never, ever, ever have to add extra buttons to your control panel to bypass ok. As sirp said, you can simply turn off the screens in the mame.ini and as sirp said, this is covered in the mame faq. And on top of that this question has been asked countless times on this very message board.
So in summary.... rtfm, rtfmb
Sorry but everyone was being far too nice, wasting their time on a question that shouldn't have to be asked anymore so I couldn't be quiet.
