This is the pinout for the Mysterious Stone Board. Pin labeled with "??" means not connected or unknown function.
ATTENTION!! The following wiring list is tested and working on my CLONE board!!
No idea about the original one.

Piero Andreini
piero@ilrspa.com
	
   Game: Mysterious Stones (Clone Board)
	
	
   36 Pin Wiring List

A1=??			B1=+12V
A2=SPK+			B2=SPK+
A3=FIRE			B3=UP
A4=RIGHT		B4=LEFT
A5=1P START		B5=2P START
A6=??			B6=??
A7=??			B7=??
A8=??			B8=??
A9=??			B9=DOWN
A10=COIN 1		B10=??
A11=??			B11=??
A12=KICK		B12=??
A13=GREEN		B13=BLU
A14=RED			B14=SYNC
A15=??			B15=??
A16=GND			B16=GND
A17=GND			B17=GND
A18=+5V			B18=VCC