8086 Driver for 3COM Etherlink III 3C509B cards Here is a driver and a configuration program for the 3C509B family of network interface cards (NICs) which work in IBM PC and XT hardware. Quick start Download: *3c509.com Driver *3ccfg.exe Configuration) Use: 3ccfg.exe configure /int:3 /optimize:dos /modem:none /pnp:disabled /xcvr:auto 3c509.exe 0x60