I knew it was an original as I did order it direct from SNK when it came out, tax write off toochris1 said:It's Legit..
It's a little daughter board...added for some reason..
I'm not sure on the details of it but my MS3 cart has it and it's clear cased too..(US)
. But thanks for replying so fast
This is identical to the older style EPROM changes, however... done in flash.