ALTA RESEARCH CORPORATION

ETHERCOMBO-16 T/C(VERSION 1.0)

NIC Type      Ethernet
Transfer Rate 10Mbps
Data Bus      8/16-bit ISA
Topology      Star

              Linear bus
Wiring Type   Unshielded twisted pair

              RG58A/U 50ohm coaxial
Boot ROM      Available

[Image]

                   I/O BASE ADDRESS AND BOOT ROM ADDRESS

      I/O Address           Boot ROM           JP1A             JP1B
                            Address

  »       300-31Fh           C8000h           Closed           Closed

          320-33Fh           CC000h            Open            Closed

          340-35Fh           D0000h           Closed            Open

          360-37Fh           D4000h            Open             Open

                                         INTERRUPT REQUEST

   IRQ      JP1C     JP1D     JP1E     JP1F    JP1G     JP2A     JP2B     JP2C     JP2D     JP2E

      2/9  Closed    Open     Open     Open    Open     Open     Open     Open     Open     Open

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

      4     Open     Open    Closed    Open    Open     Open     Open     Open     Open     Open

      5     Open     Open     Open    Closed   Open     Open     Open     Open     Open     Open

      7     Open     Open     Open     Open    Closed   Open     Open     Open     Open     Open

      10    Open     Open     Open     Open    Open     Open     Open     Open     Open    Closed

      11    Open     Open     Open     Open    Open     Open     Open     Open    Closed    Open

      12    Open     Open     Open     Open    Open     Open     Open     Closed   Open     Open

      14    Open     Open     Open     Open    Open     Closed   Open     Open     Open     Open

      15    Open     Open     Open     Open    Open     Open     Closed   Open     Open     Open

                                 BOOT ROM

                Setting                                 JP3

  »               Disabled                       Pins 2 & 3 closed

                   Enabled                       Pins 1 & 2 closed

                                CABLE TYPE

                  Type                                  JP4

  »        Unshielded twisted pair               Pins 2 & 3 closed

            RG58A/U 50ohm coaxial                Pins 1 & 2 closed

                             NETWORK STANDARD

               Standard                                JP5

  »             802.3 IEEE                      Pins 1 & 2 closed

                802.2 IEEE                      Pins 2 & 3 closed

  Note:The 802.2 IEEE setting allows the card to act as a bridge between
  an Ethernet PC network and a mainframe

                        POLARITY LED CONFIGURATION

      Setting           LED4           Condition           JP6A & JP6B

  »      Normal          On       Polarity reversed &       Pins 1 & 2
                                       corrected              closed

                         Off       Polarity correct

        Reversed         On        Polarity correct         Pins 2 & 3
                                                              closed

                         Off      Polarity reversed &
                                       corrected

  Note:Changing this option to reversed does not reverse the polarity of
  the twisted pair wires, that is done

                            COMPATIBILITY MODE

                 Setting                                JP7

  »               Disabled                            Closed

                   Enabled                             Open

  Note:If the system in which the card is to be installed is an 80286
  using an older C & T or VLSI chipset and the

                             DIAGNOSTIC LED(S)

     LED         Color         Status                Condition

    LED1         Green           On             Twisted pair network
                                                 connection is good

    LED1         Green          Off             Twisted pair network
                                                connection is broken

    LED2          Red            On         Data is being transmitted or
                                                      received

    LED2          Red           Off         Data is not being transmitted
                                                    or received

    LED3          Red            On        Collision detected on network

    LED3          Red           Off           No collisions detected on
                                                      network

  Note:For the function of LED4, please see the Polarity LED
  Configuration table.