Documentation UP Xtreme i12

I recently bought several up Xtreme i12 and need to understand the pin-out of the board. E.g. what is the Linux sysfs gpios for the 40 pin header? I tried the Xtreme i11 instructions, but the pin numbering doesn't seem to be the same.

Could this please be added, including pwm, i2c, spi Info and examples?