Hi, I'm selling the megadrive which has been used to develop the demo zombie :
https://www.ebay.fr/itm/113754860735?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
Working with hidden switch, maybe overclocked, don't remember.
Hope it'll come to a scener's hand, that's why I post it here.
Bye.