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

NAME
     de - DEC DC21x4x (Tulip) Ethernet driver

SYNOPSIS
     de* at pci? dev ? function ?

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 following media types and options (as given to ifconfig(8)) are sup-
     ported:

           media autoselect
                Enable autoselection of the media type and options.

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

           media 10base2
                Set 10Mbps operation on the BNC port.

           media 10base5
                Set 10Mbps operation on the AUI port.

           media 100baseTX
                Set 100Mbps (Fast Ethernet) operation.

           media 100baseFX
                Set 100Mbps operation.

           media 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 -m
     <device>. For example, ifconfig -m de0.

     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.

     Use the ifconfig(8) command an in particular the -m flag to list the sup-
     ported media types for your particular card.

     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.

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

SEE ALSO
     arp(4), intro(4), netintro(4), ifconfig(8)

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

OpenBSD 3.0                    January 19, 1997                              2
