NATIONAL SEMICONDUCTOR CORPORATION

ETHERNODE 16AT-T

NIC Type      Ethernet
Transfer Rate 10Mbps
Data Bus      8/16-bit ISA
Topology      Linear Bus
Wiring Type   Unshielded twisted pair

              AUI transceiver via DB-15 port
Boot ROM      Available

[Image]

                        CARD IDENTIFICATION NUMBER

    Number           JP1A           JP1B           JP1C          JP1D

  »      1           Open           Open           Open         Closed

         2           Open           Open          Closed         Open

         3           Open          Closed          Open          Open

         4          Closed          Open           Open          Open

  Note: Up to four NICs can be installed in a single system. If more than
  one card is installed, each card must have a different Identification
  number.

                            LINK INTEGRITY TEST

                 Setting                                W3

  »                Enabled                       Pins 2 & 3 closed

                   Disabled                      Pins 1 & 2 closed

  Note: The link integrity test is only valid when the cable type is
  unshielded twisted pair.

                       NETWORK SEGMENT LENGTH NOTES

  The segment length is automatically detected and configured on this
  card, but may not be on other cards on the network segment. All NICs on
  the network segment must have this option set the same.

                           DATA BUS SPEED NOTES

  On some systems the data bus timing is not truly IBM PC/AT compatible.
  If the card is not initializing, Changing the data bus speed from
  'Normal' to 'Fast' may allow the card to operate properly. To change
  the data bus speed you must use the ICRCNFIG utility that comes with
  the card.

                  BOOT ROM/CHECKPOINT SECURITY CHIP NOTES

  The boot ROM socket accepts an 8K boot ROM or a CheckPoint security
  chip. The CheckPoint security chip supplies virus protection, access
  control, and access logging functions.

                             DIAGNOSTIC LED(S)

       Color             Status                     Condition

       Green               On            Twisted pair network connection
                                                     is good

       Green               Off           Twisted pair network connection
                                                    is broken

        Red                On              Data is being transmitted or
                                                    received

        Red                Off           Data is not being transmitted or
                                                    received