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NAME

     ep - Ethernet driver for 3Com Etherlink III (3c5x9) interfaces

SYNOPSIS

     To compile this driver into the kernel, place the following line in your
     kernel configuration file:

           device ep

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

           if_ep_load="YES"

DESCRIPTION

     The ep device driver supports network adapters based on the 3Com 3C5x9
     Etherlink III Parallel Tasking chipset.

     Various models of these cards come with a different assortment of
     connectors:

     AUI/DIX               Standard 15 pin connector, also known as 10base5
                           (thick-net)

     10Base2               BNC, also known as thin-net

     10BaseT               UTP, also known as twisted pair

     The default port to use is the port that has been selected with the setup
     utility.  To override this, use the following media options with
     ifconfig(8) or in your /etc/rc.conf file.

     10base5/AUI           Use the AUI port.

     10base2/BNC           Use the BNC port.

     10baseT/UTP           Use the UTP port.

     If there are multiple cards in the computer, they are searched for in the
     following order: bus, slot, then Ethernet address.

HARDWARE

     The ep driver supports Ethernet adapters based on the 3Com 3C5x9
     Etherlink III Parallel Tasking chipset, including:

     ·   3Com 3C1 CF
     ·   3Com 3C509-TP, 3C509-BNC, 3C509-Combo, 3C509-TPO, 3C509-TPC ISA
     ·   3Com 3C509B-TP, 3C509B-BNC, 3C509B-Combo, 3C509B-TPO, 3C509B-TPC ISA
     ·   3Com 3C529, 3C529-TP MCA
     ·   3Com 3C562/3C563 PCMCIA
     ·   3Com 3C569B-J-TPO, 3C569B-J-COMBO CBUS
     ·   3Com 3C574, 3C574TX, 3C574-TX, 3CCFE574BT, 3CXFE574BT, 3C3FE574BT
         PCMCIA
     ·   3Com 3C579-TP, 3C579-BNC EISA
     ·   3Com 3C589, 3C589B, 3C589C, 3C589D, 3CXE589DT PCMCIA
     ·   3Com 3CCFEM556B, 3CCFEM556BI PCMCIA
     ·   3Com 3CXE589EC, 3CCE589EC, 3CXE589ET, 3CCE589ET PCMCIA
     ·   3Com Megahertz 3CCEM556, 3CXEM556, 3CCEM556B, 3CXEM556B, 3C3FEM556C
         PCMCIA
     ·   3Com OfficeConnect 3CXSH572BT, 3CCSH572BT PCMCIA
     ·   Farallon EtherWave and EtherMac PC Card (P/n 595/895 with BLUE arrow)

NOTES

     The 3c509 card has no jumpers to set the address.  3Com supplies software
     to set the address of the card in software.  To find the card on the ISA
     bus, the kernel performs a complex scan operation at IO address 0x110.
     Beware!  Avoid placing other cards at that address!

     Furthermore, the 3c509 should only be configured in EISA mode when
     installed in a computer that has actual EISA slots (and an EISA-aware
     BIOS).  The normal driver auto-detection support is sufficient for non-
     EISA systems.

     Many different companies sold the 3Com PC Cards under their own private
     label.  These cards also work.

     The Farallon EtherWave and EtherMac card came in two varieties.  The ep
     driver supports the 595 and 895 cards.  These cards have the blue arrow
     on the front along with a 3Com logo.  The Farallon 595a cards, which have
     a red arrow on the front, are also called EtherWave and EtherMac.  They
     are supported by the sn(4) driver.

DIAGNOSTICS

     ep0: reset (status: %x)  The driver has encountered a FIFO underrun or
     overrun.  The driver will reset the card and the packet will be lost.
     This is not fatal.

     ep0: eeprom failed to come ready  The eeprom failed to come ready.  This
     probably means the card is wedged.

     ep0: 3c509 in test mode. Erase pencil mark!  This means that someone has
     scribbled with pencil in the test area on the card.  Erase the pencil
     mark and reboot.  (This is not a joke).

     ep0: No I/O space?!  The driver was unable to allocate the I/O space that
     it thinks should be there.  Look for conflicts with other devices.

     ep0: No irq?!  The driver could not allocate the interrupt it wanted.
     Look for conflicts, although sharing interrupts for PC Card is normal.

     ep0: No connectors!  The driver queried the hardware for what ethernet
     attachment were present, but the hardware reported none that the driver
     recognized.

     ep0: Unable to get Ethernet address!  The driver was unable to read the
     ethernet address from the EEPROM.  This is likely the result of the card
     being wedged.

     ep0: if_alloc() failed  The driver was unable to allocate a ifnet
     structure.  This may happen in extremely low memory conditions.

     ep0: strange connector type in EEPROM: assuming AUI  The driver does not
     know what to do with the information the EEPROM has about connectors, so
     it is assuming the worst.

     ep0: unknown ID 0xXXXXXXXX  The driver has found an ID that it believes
     it supports, but does not have a specific identification string to
     present to the user.

     ep0: <%s> at port 0x%03x in EISA mode  The 3C509 ISA card is in EISA
     mode.  This message appears to be purely informational.

     ep0: <%s> at x0%03x in PnP mode  This card appears to be in Plug and Play
     mode.  It should be probed as part of the plug and play phase of the ISA
     probes.

     ep0: Invalid EEPROM checksum!  The EEPROM has a bad checksum, so the
     driver is ignoring the card.

     ep0: bus_setup_intr() failed!  The driver was unable to setup the
     interrupt handler.  This should never happen.

SEE ALSO

     altq(4), ed(4), el(4), ie(4), intro(4), ng_ether(4), sn(4), vx(4),
     ifconfig(8)

STANDARDS

     are great.  There is so many to choose from.

BUGS

     Support for the 3Com 3C1 CompactFlash is not working.