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                                     

<gopher://bitreich.org/I/th99/n/A-B/40385-1.png>
   

   +------------------------------------------------------------+
   |           I/O BASE ADDRESS AND BOOT ROM ADDRESS            |
   |------------------------------------------------------------|
   |   I/O Address   | Boot ROM Address |   JP1A    |   JP1B    |
   |-----------------+------------------+-----------+-----------|
   |>> |  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.                                       |
   +------------------------------------------------------------+