ADM8511 Linux driver has been embedded in Linux since kernel 2.4.2, ADM8513 Linux driver has been embedded in Linux since kernel 2.4.20, ADM8515 Linux driver has been embedded in Linux since kernel 2.6.4, and uses same pegasus module, users can add PID 8515 manually. users can get more information from below: http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/pegasus2/pegasus/ Q: How to add ADM8515 to the support list? A: 1. Add the device ID 0x8515 into .../drivers/usb/pegasus.h just like is done there for the other vendors, as below: PEGASUS_DEV( "ADMtek ADM8515 \"Pegasus II\" USB 2.0 Ethernet", VENDOR_ADMTEK, 0x8515, DEFAULT_GPIO_RESET | PEGASUS_II ) After, In /usr/src/linux-2.4/, you could make modules. Then cd drivers/usb/ and insmod ./pegasus.o. 2. If the driver don't complain about impossibility to reset the MAC then you can be pretty sure you have pegasus based device. Q: How to add new device to the support list? A: Add the vendor and the device IDs into .../drivers/usb/pegasus.h just like is done there for the other controllers. If the driver don't complain about impossibility to reset the MAC then you can be pretty sure you have pegasus based device. Make sure you send me (petkan@users.sourceforge.net) a patch with the new device added.