GB (GameBoy)

    * Nintendo GameBoy Homepage: technical info on GameBoy (R-USA) 

2.2) SNES (Super Nintendo Ent. System)

    * Super Nintendo Entertainment System: pinouts & protocol V1.01 (14KB) 

(From Christopher John Piastri)

SNES controller
    _________
 1 |    U    | 20
 2 |         | 19
 3 |         | 18
 4 |         | 17
 5 |         | 16
 6 |         | 15
 7 |         | 14
 8 |         | 13
 9 |         | 12
10 |_________| 11


1 : Pad: Down
2 : Pad: Left
3 : Pad: Right
4 : Select
5 : Start
6 : Output 1
7 : Output 2 
8 : Output 3
9 : Output 4
10: Gnd (pin 5 on connector)
11: nc
12: nc
13: Y
14: B
15: A
16: X
17: R
18: L
19: Pad: Up
20: nc