-5V Ampere rating for Jamma PCBs

I was wondering what the minimum -5V ampere rating is for JAMMA systems since my PSU belonged to an old PC and only supports .3A for -5V

Addendum: what would 5V and 12V requirements be for a 4 slot for more than one game at a time? PSU supports 7.5A and 4.7A respectively

Typical -5 volt max rating on an arcade PSU is usually 1 amp.

Having said this the -5 only supplies the audio op-amps which do not draw much current, so you may get away with 0.3 amps- try it and see

edit-your addendum: those max 5/12 volt current ratings will suffice for a 4 slot.