ZENITH DATA SYSTEMS

SQ-5550/5551

NIC Type      Ethernet
Transfer Rate 10Mbps
Data Bus      16-bit ISA
Topology      Star
Wiring Type   Shielded/Unshielded twisted pair
Boot ROM      Available

[Image]

                                   DMA CHANNEL

  Channel    JP1A     JP1B     JP1C     JP1D    JP2A     JP2B     JP2C     JP2D

      DMA3   Open     Open     Open    Closed   Open     Open     Open     Closed

  »   DMA5   Open     Open    Closed    Open    Open     Open     Closed   Open

      DMA6   Open    Closed    Open     Open    Open     Closed   Open     Open

      DMA7  Closed    Open     Open     Open    Closed   Open     Open     Open

                             INTERRUPT REQUEST

    IRQ       JP3A      JP3B       JP3C      JP3D       JP3E       JP3F

  »    3     Closed     Open       Open      Open       Open       Open

       4      Open     Closed      Open      Open       Open       Open

       5      Open      Open      Closed     Open       Open       Open

       9      Open      Open       Open     Closed      Open       Open

      10      Open      Open       Open      Open      Closed      Open

      15      Open      Open       Open      Open       Open      Closed

                               DATA I/O MODE

                Setting                                JP4

  »              8-bit mode                     Pins 2 & 3 Closed

                16-bit mode                     Pins 1 & 2 Closed

  Note:Card must be installed in a 16-bit slot. This setting controls the
  size of the data bus used. Memory accesses always use 16-bit words.

                                 BOOT ROM

                 Setting                                JP5

  »               Disabled                             Open

                   Enabled                            Closed

                   I/O BASE ADDRESS AND BOOT ROM ADDRESS

      Address           ROM Address           JP6               JP7

  »       300h             C8000h            Closed           Closed

          320h             CC000h            Closed            Open

          340h             D0000h             Open            Closed

          360H             D4000h             Open             Open

[Image]

                             DIAGNOSTIC LED(S)

         LED                 Status                    Condition

          1                    On              Data is being transmitted

          1                    Off                 Data is not being
                                                      transmitted

          2                  Bright             Data is being received

          2                    Dim               Link pulses are being
                                                       received

          2                    Off            Data is not being received