I just got one of these CD Backup Ram Carts but I cant seem to get it to work. Were they region locked? I have a pal mega drive 2 and the cartridge is from USA. I hold down A B C when I turn on the system and nothing happens. Both the power is connected to the megadrive and sega cd. I get no menu options to access the ram cart.
I have tried using the cartridge with the Pro Action Replay 2 but nothing even boots when I turn the system on.