Ok I was able to get this working. Since there is like 0 info on the net I figure I'd post what I found out.
First of I was able to successfully convert this fx-pad to usb!! I used an atmel atmega chip with avr programming.
Here is the correct pin out.
facing the game pad plug
1 2 3 4
0 0 0 0
0 0 0
5 6 7
3 set low, this may be the data direction
I'm not sure what the original clock speed is but with my 12 mhz, I set it to 6us and it worked fine. Raise the latch, then looping.. lower the clock, read a bit, higher the clock..16 bits and your done ;)
Chances are I will not be back to this forum so PM, and replying wont find me. If you need to find me, look for bliss-box usb controller, that's me ;) Also if you find this useful please link back to my main page. http://bliss-box.net