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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
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 connec‐
      tors:
 
      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 Ether‐
      link 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
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 couldn’t 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 struc‐
      ture.  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 doesn’t 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 inter‐
      rupt handler.  This should never happen.
ifconfig(8)
 

STANDARDS

      are great.  There is so many to choose from.
 

BUGS

      Support for the 3Com 3C1 is not working.