ENP(7)              RISC/os Reference Manual               ENP(7)



NAME
     enp - CMC 10 Mb/s Ethernet interface

SYNOPSIS
     device enp0 at vme? csr 0xde0000 am 0x3d vector enpintr
     device enp1 at vme? csr 0xe00000 am 0x3d vector enpintr

DESCRIPTION
     The enp interface provides access to a 10 Mb/s Ethernet net-
     work through a CMC controller.

     Each of the host's network addresses is specified at boot
     time with an SIOCSIFADDR ioctl. The station address is
     discovered by probing the on-board Ethernet address regis-
     ter, and verifies the protocol address.  No packets will be
     sent or accepted until a network address is supplied.  The
     enp interface employs the address resolution protocol
     described in arp(7P) to dynamically map between Internet and
     Ethernet addresses on the local network.

     The interface handles both Internet and NS protocol fami-
     lies.  The use of trailers is negotiated with ARP. However,
     this negotiation may be disabled, on a per-interface basis,
     by setting the IFF_NOTRAILERS flag with an SIOCSIFFLAGS
     ioctl.

DIAGNOSTICS
     enp%d: hardware address %s.
               This is a normal autoconfiguration message noting
               the 6 byte physical ethernet address of the
               adapter.

     enp%d: can't handle af%d.
               The interface was handed a message with addresses
               formatted in an unsuitable address family; the
               packet was dropped.

forming
     The following messages indicate a probable hardware error per-
               the indicated operation during autoconfiguration
               or initialization.  See the hardware manual for
               details.

     enp%d: detected error on reset.

     enp%d: timed out waiting for reset.

     enp%d: application firmware failed.

SEE ALSO
     arp(7P), inet(7F), intro(7N).




                        Printed 11/19/92                   Page 1