But is it real? I doubt it.
Not real. I posted this image as a joke in vHacks: Virtual Hacks?
Such a device might be possible, but it might not be that practical. Imagine connecting this to your Raspberry Pi, PC, or Mac. A small drive appears with a read/write file of 65536 bytes in length. Accessing the file/memory locations $C100-$Cfff and you would interface with the cards plugged into the Apple II cards in those slots. An emulator could use this to interface with real Apple II peripherals.