Inserting coin for fifth and sixth player?

[BR0M]

i have xmen (6player) how do i insert credits for the fifth and sixth players?

 

[FatTrucker]

I'm not sure those controls are mapped by default.

Press the TAB key in game and go to 'controls for this game' you can remap them there.

 

[ulaoulao]

I think the default is 1-8 keys. but ya its easy to set up..