As the title says, I recently obtained a Nintendo DemoBoy II but I don't know much about it. I tried asking the good folks at AtariAge, but was recommended to ask here. So here I am.
I understand that it was used to connect an original Gameboy to an external monitor for demos and store displays. However, that's about all I know. I've tried looking this up, but there doesn't seem to be very many of these out there. As such, there doesn't seem to be much information to find.
When powered on, It puts out a picture (orange and green with a boarder), but I have no idea how to connect a Gameboy to it. This one seems to be able to connect two GameBoys, and has outputs for two screens, but would I need a connection cable for two player games? Is there any advantage to this over the Super Gameboy for the SNES?
Also, I have no idea what it's worth? What its specifications are? If it can be used with other Gameboys (Pocket, Color, Advanced, so on)? Or if it can be interfaced with other non-Nintendo portable devices (SEGA or Atari)?
Basically, I have this new toy now and I have no idea how to use it.