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Would love to see Rygar Arcade, Ninja Gaiden Arcade, Bucky Ohare Arcade and Battle Toads Arcade on the Neo Geo CD. I have Been playing the shinobi for neo geo cd on my Polymega. Plays great!!

How did you get it to play without the white screen covering the playfield on Polymega?

You need to put the official neo geo cd bios on a USB stick and insert it before launching the game. Follow polymega steps on how to set that up on there help page.

I have the bios on an SD card, and still get a white screen.  I even tried the plain NGCD bios, CDZ, and even unibios.

Did it load up with the neo geo cd intro logo before launching the game? Money came up with white screen with polymega bios. Worked fine with neogeo cd bios. Did you follow the instructions on how to make the folder on the sdcard? 

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.

Glad it worked for you

Thanks for debugging this.  Good to know it works on original bios at least.

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.

Well hopefully you can have golden axe soon enough.