Double-checked the card.. when I swapped in a different bios, it was misnamed. Put the real CDZ bios back in place with the right name.. worked like a charm. I'd never seen the NGCD bios startup before.
Your welcome. What I am hoping for next is that the Double Dragon game that is being worked on the Neo Geo will come to Neo Geo CD. So I can play it on the Polymega.
