
3COM CORPORATION

ETHERLINK (3C501; ASSY.#1221)

NIC Type      Ethernet
Transfer Rate 10Mbps
Data Bus      8-bit ISA
Topology      Linear Bus
Wiring Type   RG-58A/U 50ohm coaxial

              AUI transceiver via DB-15 port
Boot ROM      Available

[Image]

                           CABLE TYPE SELECTION

                   Type                                Setting

           RG-58A/U 50ohm coaxial                    Option 1

        AUI transceiver via DB-15 port                Option 2

                          BOOT ROM CONFIGURATION

                Setting                                 JP3

                 Disabled                       Pins 2 & 3 Closed

                   Enabled                       Pins 1 & 2 Closed

                        I/O BASE ADDRESS SELECTION

   Address       JP4       JP5       JP6       JP7       JP8       JP9

    300h        Pins 2    Pins 2    Pins 2    Pins 2    Pins 1   Pins 1 &
                 & 3       & 3       & 3       & 3       & 2        2

    310h        Pins 1    Pins 2    Pins 2    Pins 2    Pins 1   Pins 1 &
                 & 2       & 3       & 3       & 3       & 2        2

  Note:Pins designated should be in the closed position.

                        BOOT ROM ADDRESS SELECTION

  Address    JP12   JP13    JP14    JP15    JP16    JP17    JP18    JP19

  CC000h     Pins    Pins    Pins    Pins    Pins   Pins    Pins     Pins
             2&3     2&3     1&2     1&2     2&3    2&3     1&2      1&2

  EC000h     Pins    Pins    Pins    Pins    Pins   Pins    Pins     Pins
             2&3     2&3     1&2     1&2     2&3    1&2     1&2      1&2

  Note:Pins designated should be in the closed position.

                    INTERRUPT REQUEST SELECTION

   IRQ       JP20      JP21     JP22      JP23     JP24      JP25

    2       Closed     Open     Open      Open     Open      Open

    3        Open     Closed    Open      Open     Open      Open

    4        Open      Open     Closed    Open     Open      Open

    5        Open      Open     Open     Closed    Open      Open

    6        Open      Open     Open      Open     Closed    Open

    7        Open      Open     Open      Open     Open      Closed

                           DMA CHANNEL SELECTION

  Channel     JP26       JP27      JP28       JP29      JP30       JP31

    DMA1     Closed      Open      Open      Closed     Open       Open

    DMA2      Open      Closed     Open       Open     Closed      Open

    DMA3      Open       Open     Closed      Open      Open      Closed

  Note:Setting the DMA Channel on this card is required even though "No
  Channel" is listed when setting up the LAN configuration software.

