I have an old WRT54GX2 (board rev 1.1), and was wondering if someone had an answer for me. On the main board there is a 12 pin pad labeled J7 that is probably a JTAG interface just waiting for a header to be soldered in place; anyone know which pins are which?. There is also a 4 pin header labeled JP1. I am guessing this a serial interface. Does anyone have the pin-out and specs for this header? Any help would be appreciated.