I have two Realtek ND010 Fast Ethernet PCI cards on a box. IRQ's 11 and 12 have been allocated (?by the hardware itself) and I need 12 for my PS2 mouse. Using the 'irq_addr' option with ifconfig does not work - I get the error "SIOCSIFMAP - operation not supported". There's very little on this box so I have no shortage of free IRQ's. How do I go about changing the 12 to say 10? Woody with the 2.2.20 kernel installed in a fairly standard PC. Grateful for assistance. john.