Hey, guys. My friend snagged me this item off eBay as a gift. It's supposedly a memory expansion for the PC-engine Duo that plugs in through the controller port, and runs on 4 AA batteries. It plugs into a US Duo just fine. Unfortunately, I can't figure out how to access it. Going into the memory utlitity on the Super CD Bios doesn't really do anything...it doesn't seem to identify it.
Does anybody know how these things work? It appears that there was a battery leak in this thing at some point because there's dried copper sulfate spattered throughout the battery case, but the connectors all look clean. Any clues?
Thanks in advance!!
G