There was only OpenPort 1.0 and now OpenPort 1.2. The 1.1 design was passed over. The OpenPort 1.2 has the following improvements
* crystal USB oscillator instead of ceramic resonator (I had a couple of bad units because of this)
* removal of opto isolators to increase speed (can now go up to 1Mbaud)
* addition of serial EEPROM for USB VID/PID to allow software to automatically identify OpenPort
* switchable 12V programming line to allow safe connection to non-Subarus and to initialize EVOs
* better regulated 12V line - now usually within 50mV of 12V
* connection of L-line to both Subaru and standard L-lines
* improved board design for easier manufacture / assembly