char *configstart
unsigned char def_mac[6] = {0, 0xaa, 0xbb, 0xcc, 0xdd, 0xee};

   for (configstart = (char *)0xbffff000;
         configstart > (char *)0xbff80000;
         configstart -= 0x1000) {

         if ( *(int *)configstart == 0x35333131)
            /* megvan a config magic */
            break;
   }

   if (*(int *)configstart != 0x35333131)
       printk("no valid mac found, using defaults");
       memcpy(dev->dev_addr, def_mac, 6);
   else
       memcpy(dev->dev_addr, ((u8 *)configstart)+102, 6);
   fi