So I have proably an old one, never seen a license text afairecognized,
there was a white screen with the blue sega logo i thought that was the one that was on the bios, but i couldn't find any bios text.
My Megadrive is from May 1992, thats what the print on the pcb says, but i dunno if this makes it old, for i don't know when MD/GEN came onto market.
I just collecting for a year or slt