If you are going to do that, you may as well use the GPIO as input directly, and save you the programming of the teensy as well as the cost of the part

I actually figured the NES-Z would be a lot cheaper than what we're paying for the GBZ (we don't need many of the parts). Plus, it serves dual purpose. It can be outfitted with an RPi3 and emulate more systems, such as N64. I was hoping for a cheap mod, but if price tags come close it only makes se...

Well, comparing prices of a whole NES - Z project, maybe those 100 bucks won't be that big expense. Plus, you already have functioning original hardware ;) I actually figured the NES-Z would be a lot cheaper than what we're paying for the GBZ (we don't need many of the parts). Plus, it serves dual ...