GATEWAY COMMUNICATIONS, INC.

G/ETHERTWIST AT, AT-WS ADAPTER (NATIONAL CHIPSET)

NIC Type      Ethernet
Transfer Rate 10Mbps
Data Bus      16-bit ISA
Topology      Star
Wiring Type   Shielded twisted pair

              Unshielded twisted pair

              AUI transceiver via DB-15 port
Boot ROM      Available

[Image]

                                        INTERRUPT REQUEST

   IRQ     JP3      JP4      JP5      JP6      JP7      JP8      JP9     JP10     JP11     JP12

  »   3    Open     Open     Open     Open    Open     Open     Open     Open    Closed    Open

      15  Closed    Open     Open     Open    Open     Open     Open     Open     Open     Open

      12   Open    Closed    Open     Open    Open     Open     Open     Open     Open     Open

      11   Open     Open    Closed    Open    Open     Open     Open     Open     Open     Open

      10   Open     Open     Open    Closed   Open     Open     Open     Open     Open     Open

      7    Open     Open     Open     Open    Closed   Open     Open     Open     Open     Open

      6    Open     Open     Open     Open    Open     Closed   Open     Open     Open     Open

      5    Open     Open     Open     Open    Open     Open     Closed   Open     Open     Open

      4    Open     Open     Open     Open    Open     Open     Open     Closed   Open     Open

      2    Open     Open     Open     Open    Open     Open     Open     Open     Open    Closed

                             I/O BASE ADDRESS

      Address           SW1/1        SW1/2         SW1/3         SW1/4

  »      2A0-2BF         On           Off           On            On

         280-29F         On            On           On            On

         2C0-2DF         On            On           Off           On

         2E0-2FF         On           Off           Off           On

         300-31F         On            On           On            Off

         320-33F         On           Off           On            Off

         340-35F         On            On           Off           Off

         360-37F         Off           On           Off           Off

                            BASE MEMORY ADDRESS

          Base Address                  SW1/5                SW1/6

             C0000-C3FFF                 On                    On

             C4000-C7FFF                 Off                   On

             C8000-CBFFF                 On                   Off

  »         CC000- CFFFF                 Off                  Off

                            LINK INTEGRITY TEST

                Setting                                JP31

  »                Enabled                       Pins 1 & 2 Closed

                  Disabled                       Pins 2 & 3 Closed

  Note:Link Integrity is only used with 10Base-T wiring. When using an
  AUI transciever, the test should be disabled.

                               COMPATIBILITY

                   Mode                                  JP2

  »            Compatibility on                   Pins 1 & 2 Closed

               Compatibility off                  Pins 2 & 3 Closed

  Note: If one of the following problems presist after checking all other
  possibilities turn off Compatibility:

                                CABLE TYPE

            Type              JP8    JP9     JP10   JP11    JP12    JP13

       AUI transceiver via    Pins   Pins    Pins   Pins    Pins   Closed
           DB-15 port         2 &     2 &    2 &     2 &    2 &
                               3      3       3      3       3

  »    Shielded/Unshielded    Pins   Pins    Pins   Pins    Pins    Open
          twisted pair        1 &     1 &    1 &     1 &    1 &
                               2      2       2      2       2

  Note: Pins designated should be in the closed position.

[Image]

                             DIAGNOSTIC LED(S)

              Status                              Condition

      Jabber LED (1) on (Red)           Adapter is continually sending
                                                 random data

    Link test LED (2) on (Red)             Network connection good

   Transmit LED (3) blinks (Red)          Data is being transmitted

     Receive LED (4) on (Red)              Data is being received

  Note: When using the AUI port, the LEDs are not functional.

                            MISCELLANEOUS NOTES

  The AT adapter can be used in a file server or a work station.

  The AT-WS adapter can be used in a work station only.

  Different drivers must be used for the National & the Fujitsu chipset
  cards, they are not interchangeable. Fujitsu drivers may be used for
  either 8 or 16 bit Fujitsu cards. While the National chipset cards
  require a different driver for an 8 or 16 bit card.