Advantech AIR-500D User Manual page 58

 PCI Express Configuration
– Port8xh Decode
Enable/Disable PCI Express Port8xh Decode.
– Peer Memory Write Enable
Enable/Disable Peer Memory Write.
– Compliance Test Mode
Enable when using Compliance Load Board.
– LAN1/LAN2 Controller
Enable/Disable on board LAN1/LAN2 from Intel i210 Controller support.
– Intel X550 Controller
Enable/Disable on board LAN3/LAN4 from Intel X550 Controller support.
(LAN3/LAN4 are optional by AMO-I031)
AIR-500D User Manual 42