DE(4)                     OpenBSD Programmer's Manual                    DE(4)

NAME
     de - DEC DC21x4x (Tulip) 10/100 Ethernet device

SYNOPSIS
     de* at pci?

DESCRIPTION
     The de device driver supports Ethernet adapters based on the Digital
     Equipment DC21x4x based self-contained Ethernet chips.  This includes,
     among others, the following models:

           Asante
           Cogent EM100FX and EM440TX
           DEC PCI DE435, EISA DE425, DE450, DE500
           older Linksys 10, 10/100
           SMC 8432, 9332, 9334
           ZNYX ZX3xx

     This driver may support other cards based on the 21040 and 21041 Ethernet
     controllers, or the 21140[A], 21141, 21142, and 21143 Fast Ethernet con-
     trollers.

     The de driver supports the following media types:

           autoselect   Enable autoselection of the media type and options.

           10baseT      Set 10Mbps operation on the 10baseT port.

           10base2      Set 10Mbps operation on the BNC port.

           10base5      Set 10Mbps operation on the AUI port.

           100baseTX    Set 100Mbps (Fast Ethernet) operation.

           100baseFX    Set 100Mbps operation.

           100baseT4    Set 100Mbps operation (4-pair cat-3 cable).

     The de driver supports the following media options:

           full-duplex  Set full duplex operation for UTP port.

     For more information on configuring this device, see ifconfig(8).  To
     view a list of media types and options supported by your card try
     ifconfig <device> media.  For example, ifconfig de0 media.

     Note that the media types available depend on the particular card in use.
     Some cards are explicitly programmed to a particular media type by a set-
     up utility and are not changeable.

     The old ``ifconfig linkN'' method of configuration is not supported.

DIAGNOSTICS
     de%d: waking device from sleep/snooze mode  The 21041 and 21140A chips
     support suspending the operation of the card.

     de%d: error: desired IRQ of %d does not match device's actual IRQ of
     %d  The device probe detected that the board is configured for a differ-
     ent interrupt than the one specified in the kernel configuration file.

     de%d: not configured; limit of %d reached or exceeded  There is a limit
     of 32 de devices allowed in a single machine.

     de%d: not configured; 21040 pass 2.0 required (%d.%d found)
     de%d: not configured; 21140 pass 1.1 required (%d.%d found)  Certain re-
     visions of the chipset are not supported by this driver.

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5),
     ifconfig(8)

AUTHORS
     The de device driver was written by Matt Thomas.  This manual page was
     written by David E. O'Brien.

CAVEATS
     Since the 21040 is available on both EISA and PCI boards, one must be
     careful in how one defines the 21040 in the kernel config file.

OpenBSD 4.7                    September 7, 2008                             2
