Shanghai Kid
These were figured out by poking at a PCB and seeing what happens. If you
need to yell at me, email tim@arcadecollecting.com


Parts side       Solder side
----------       -----------

 1 Ground         1 Ground
 2 Ground         2 Ground
 3 +5             3 +5
 4 +5             4 +5
 5 +12            5 +12
 6 Speaker +      6 Speaker -
 7 1P Punch       7 1P Kick
 8 N/C            8 N/C
 9 1P Right       9 1P Left
10 1P Down       10 1P Up
11 2P Punch      11 2P Kick
12 N/C           12 N/C
13 2P Right      13 2P Left
14 2P Down       14 2P Up
15 Coin 2        15 Coin 1
16 1P Start      16 Service
17 N/C           17 2P Start
18 +5            18 N/C
19 Green Video   19 Red Video
20 Sync          20 Blue Video
21 Ground        21 Ground
22 Ground        22 Ground