The address and IRQ used by the 3c505 driver can be configured at boot time by typing 'ether=eth0,15,0x300' (replace IRQ and base address with ones that tell how your adapter is jumpered). The driver does not yet use DMA. If no base address is given at the boot time, the driver will look for a 3c505 adapter at addresses 0x300, 0x280 and 0x310 in this order, possibly messing up any other hardware residing in these addresses. If a base address is given, it will be verified. The driver has two compile-time settings in the CONFIG file: ELP_NEED_HARD_RESET Some DOS drivers seem to get the adapter to some irrecoverable state if the machine is "warm booted" from DOS to Linux. If you experience problems when warm booting, but "cold boot" works, #defining this to 1 may help. As of 3c505.c v0.8 the driver should be able to find out whether of not this is needed, but I'm not completely sure. ELP_DEBUG The driver debug level. 1 is ok for most everything, 0 will provide less verbose bootup messages, and 2 and 3 are usually too verbose for anything. Known problems: During startup the driver shows the following two messages: *** timeout at 3c505.c:elp_set_mc_list (line 1158) *** *** timeout at 3c505.c:elp_set_mc_list (line 1183) *** These are because upper parts of the networking code attempt to load multicast address lists to the adapter before the adapter is properly up and running. Authors: The driver is mainly written by Craig Southeren, email . Parts of the driver (adapting the driver to 1.1.4+ kernels, IRQ/address detection, some changes) and this README by Juha Laiho .