sudomod

I found a picture the other night and cant find it now. That showed the wiring from the teensy to the pizero. Can anyone help me with that now? Thanks

The teensy needs to be wired to the pi's USB (pp22 and pp23) or to a usb hub which is then wired to the pi. See this image for a wiring diagram.

http://i.imgur.com/pxrDRiJ.png

Also refer to Wermy's guides (part 2 and 6).

http://www.sudomod.com/game-boy-zero-guide-part-2/
http://www.sudomod.com/game-boy-zero-guide-part-6/

Just search the forums you can probably find the diagram you were looking at.