MACNET
======

   NU460 (VER. A)

   NIC Type:           Ethernet                                   
   Transfer Rate:      10Mbps                                     
   Data Bus:           32-Bit NuBus (Apple)                       
   Topology:           Linear Bus                                 
                                                                  
                       Star                                       
   Wiring Type         AUI transceiver via DB-15 port             
                                                                  
                       RG-58A/U 50ohm coaxial                     
                                                                  
                       Shielded/Unshielded twisted pair           
   Boot ROM            Available                                  

<gopher://bitreich.org/I/th99/n/M-O/40853-1.png>
   

   +------------------------------------------------------------+
   |                         CABLE TYPE                         |
   |------------------------------------------------------------|
   |         Type         |    JP3     |    JP4    |  JP5-JP10  |
   |----------------------+------------+-----------+------------|
   | AUI transceiver via  | Pins 2 & 3 | Pins 2 &  | Pins 2 & 3 |
   |      DB-15 port      |   closed   | 3 closed  |   closed   |
   |----------------------+------------+-----------+------------|
   |    RG-58A/U 50ohm    | Pins 1 & 2 | Pins 1 &  | Pins 1 & 2 |
   |       coaxial        |   closed   | 2 closed  |   closed   |
   |----------------------+------------+-----------+------------|
   | Shielded/unshielded  | Pins 2 & 3 | Pins 2 &  |    N/A     |
   |     twisted pair     |   closed   | 3 closed  |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  LINK INTEGRITY FUNCTION                   |
   |------------------------------------------------------------|
   |          Setting           |              JP1              |
   |----------------------------+-------------------------------|
   |>> |        Enabled         |       Pins 1 & 2 closed       |
   |---+------------------------+-------------------------------|
   |   |        Disabled        |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    ON-BOARD TERMINATOR                     |
   |------------------------------------------------------------|
   |          Setting           |              JP2              |
   |----------------------------+-------------------------------|
   |>> |        Disabled        |       Pins 2 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |        Enabled         |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      DIAGNOSTIC LEDS                       |
   |------------------------------------------------------------|
   | LED  | Status  |                 Condition                 |
   |------+---------+-------------------------------------------|
   |  D1  |   On    |  Twisted pair network connection is good  |
   |------+---------+-------------------------------------------|
   |  D1  |   Off   | Twisted pair network connection is broken |
   |------+---------+-------------------------------------------|
   |  D2  |   On    |          Data is being received           |
   |------+---------+-------------------------------------------|
   |  D2  |   Off   |        Data is not being received         |
   |------+---------+-------------------------------------------|
   |  D3  |   On    |         Data is being transmitted         |
   |------+---------+-------------------------------------------|
   |  D3  |   Off   |       Data is not being transmitted       |
   |------+---------+-------------------------------------------|
   |  D4  |   On    |       Collision detected on network       |
   |------+---------+-------------------------------------------|
   |  D4  |   Off   |             Normal operation              |
   |------+---------+-------------------------------------------|
   |  D5  |   On    |   Reversed polarity condition detected    |
   |------+---------+-------------------------------------------|
   |  D5  |   Off   |             Normal operation              |
   +------------------------------------------------------------+