> around i wanted to use, however they all lack a white -5v line. Would most
> boards work without this -5v?
> would my arkanoid/turtles/final fight work without one or
> shouldnt i even bother trying
>

Afaik it's mostly older game that need the -5 example.. Rastan Saga and Double Dragon.
Also even if there is no white wire, there could be a -5 spot on the PSU PCB so you could solder a wire yourself.