NES expansion port.....

[CaptainCaputo]

i bought an Nes at a yard sale for 2 bucks...i went home and tested it and the 72 pin is gone so im just gonna use it for parts but i looked underneath the chip and saw the expansion port which i imgaine was for the disk drive before it was scrapped..but my question is...is the port usable i know theres a piece of plastic covering it, is the plastic a covering or the part that never was?

[sebastius]

All systems by Nintendo have an expansion port of sorts underneath. And maybe it was even used in Japan or somewhere, but not globally. Most of them are just a bunch of adress and data lines.

[Famicoman]

I believe that is is useable. There was a post two or so years ago where someone made some sort of lottery system (as stupid as this sounds) for it. I also think there was a module made, the Teleplay, so you could play it online.

[Bruce Tomlin]

The NES expansion port also has ten lines brought down from the cartridge slot to the expansion port, which is why the NES carts are wider than Famicom carts. I think one cart is known to have one of these pins connected, but since basically nothing was made to use the slot, it was unused functionality.