I have an old Atari 2600 in the woodgrain game center. My dad worked for a company way back then that came up with a way to "bootleg" the games onto chips, the chips can be removed and replaced into the cartridge. Any idea what this thing is called, and would it possibly have any value? Here are two pics, one of the front of the cartridge, and the other is from the back. Thanks in advance! :-)