Some did not work, Red Dragon just gave an error, plus when I opened them in a graphics editor, the graphics had several wrong pixels, so I assume those are corrupted.
OK… those were originally sold on Yahoo Japan along with a lot of other auctions for stuff from Athena (including numerous empty VB dev carts). The buyer recently sold the chips to the person in sweden who i assume is the seller of this ebay auction. I received dumps of the chips and compared them to the rom dump of the final version and (unfortunately) they were exactly the same. I have no idea why Athena had the final version burned on eproms, though. Virtual bowling was shown on Shoshinkai 1995, maybe some sets of chips were burned for that, or as pre-release review copies for japanese magazines or something…?!
Joa, wie in der Demos Sektion nchzulesen, sind diese japanischen Demos (kamen mit den Store Displays) absolut mit den Retail-Versionen identisch, bis auf eben diesen Sticker auf der Box. Ein guter Scan wäre übrigens nice 😉
Either try every option 😉 or use this passwords to set the difficulty:
1000 (Very Easy)
2000 (Easy)
3000 (Normal)
4000 (Hard)
I hope they work in the japanese version as well.