The inputs are almost identical to the serial connections. The only difference is we replaced the +5v output with a second ground.
Looking at the interface with the USB connector up top:
1= A/D Input 1
2= A/D Input 2
3= A/D Input 3
4= A/D Input 4
5= Ground
6= Ground
7= Device out 1
8= Device out 2
http://www.hptuners.com/help/gfx/vcm...r_eio_plug.jpg
