GATEWAY COMMUNICATIONS, INC.
============================

   G/NET (REV.04 OR ABOVE)

   NIC Type         G-Net                                         
   Transfer Rate    2.5Mbps                                       
   Data Bus         8-bit ISA                                     
   Topology         Linear Bus                                    
   Wiring Type      RG-11/U 75ohm coaxial                         
                                                                  
                    RG-59/U 75ohm coaxial                         
                                                                  
                    RG-58/U 50ohm coaxial                         
                                                                  
                    RG-62A/U 93ohm coaxial                        
                                                                  
                    Wang style RG-59/U 75ohm dual coaxial         
   Boot ROM         Not available (optional card required)        

<gopher://bitreich.org/I/th99/n/E-H/40007-1.png>
   

   +------------------------------------------------------------+
   |                         CONNECTORS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   |      Piggy-back Keycard       |            CN1             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CABLE TYPE SELECTION                    |
   |------------------------------------------------------------|
   |               Type                |          JP1           |
   |-----------------------------------+------------------------|
   |>> | RG11/U 75ohm or RG-59/U 75ohm |   Pins 2 & 3 Closed    |
   |---+-------------------------------+------------------------|
   |   |         RG-58/U 50ohm         |   Pins 1 & 2 Closed    |
   |---+-------------------------------+------------------------|
   |   |        RG-62A/U 93ohm         |          Open          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     INTERRUPT REQUEST                      |
   |------------------------------------------------------------|
   |       IRQ        |        JP2         |        JP3         |
   |------------------+--------------------+--------------------|
   |>> |      3       | Pins 1 & 2 Closed  |        Open        |
   |---+--------------+--------------------+--------------------|
   |   |      2       |        Open        | Pins 2 & 3 Closed  |
   |---+--------------+--------------------+--------------------|
   |   |      4       | Pins 2 & 3 Closed  |        Open        |
   |---+--------------+--------------------+--------------------|
   |   |      5       |        Open        | Pins 1 & 2 Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   NODE ADDRESS SELECTION                   |
   |------------------------------------------------------------|
   |Node |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8|
   |-----+------+------+------+------+------+------+------+-----|
   |  0  |  -   |  -   |  -   |  -   |  -   |  -   |  -   |  -  |
   |-----+------+------+------+------+------+------+------+-----|
   |  1  | Off  |  On  |  On  |  On  |  On  |  On  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   |  2  |  On  | Off  |  On  |  On  |  On  |  On  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   |  3  | Off  | Off  |  On  |  On  |  On  |  On  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   |  4  |  On  |  On  | Off  |  On  |  On  |  On  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   | 251 | Off  | Off  |  On  | Off  | Off  | Off  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 252 |  On  |  On  | Off  | Off  | Off  | Off  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 253 | Off  |  On  | Off  | Off  | Off  | Off  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 254 |  On  | Off  | Off  | Off  | Off  | Off  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 255 | Off  | Off  | Off  | Off  | Off  | Off  | Off  | Off |
   |------------------------------------------------------------|
   |Notes: Node address 0 is used for messaging between nodes   |
   |and must not be used.                                       |
   |                                                            |
   |A total of 255 node address settings are available. The     |
   |switches are a binary representation of the decimal node    |
   |addresses. Switch 1 is the Least Significant Bit and switch |
   |8 is the Most Significant Bit. The switches have the        |
   |following decimal values: switch 1=1, 2=2, 3=4, 4=8, 5=16,  |
   |6=32, 7=64, 8=128. Turn off the switches and add the values |
   |of the off switches to obtain the correct node address.     |
   |(On=0, off=1)                                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE MEMORY BUFFER ADDRESS                 |
   |------------------------------------------------------------|
   |    Address     |  SW2/1   |  SW2/2   |  SW2/3   |  SW2/4   |
   |----------------+----------+----------+----------+----------|
   |>> |   D0000h   |   Off    |    On    |   Off    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   |   50000h   |   Off    |    On    |   Off    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   |   60000h   |    On    |   Off    |   Off    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   |   70000h   |   Off    |   Off    |   Off    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   |   80000h   |    On    |    On    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   |   90000h   |   Off    |    On    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   |   A0000h   |    On    |   Off    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   |   C0000h   |    On    |    On    |   Off    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   |   E0000h   |    On    |   Off    |   Off    |   Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      I/O BASE ADDRESS                      |
   |------------------------------------------------------------|
   |    Address     |  SW2/5   |  SW2/6   |  SW2/7   |  SW2/8   |
   |----------------+----------+----------+----------+----------|
   |>> | 2E0h-2E7h  |    On    |    On    |    On    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 280h-287h  |    On    |    On    |    On    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 290h-297h  |   Off    |    On    |    On    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 2A0h-2A7h  |    On    |   Off    |    On    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 2B0h-2B7h  |   Off    |   Off    |    On    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 200h-207h  |    On    |    On    |   Off    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 2D0h-2D7h  |   Off    |    On    |   Off    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 2F0h-2F7h  |   Off    |   Off    |   Off    |    On    |
   |---+------------+----------+----------+----------+----------|
   |   | 300h-307h  |    On    |    On    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 310h-317h  |   Off    |    On    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 320h-327h  |    On    |   Off    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 330h-337h  |   Off    |   Off    |    On    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 340h-347h  |    On    |    On    |   Off    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 350h-357h  |   Off    |    On    |   Off    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 360h-367h  |    On    |   Off    |   Off    |   Off    |
   |---+------------+----------+----------+----------+----------|
   |   | 370h-377h  |   Off    |   Off    |   Off    |   Off    |
   +------------------------------------------------------------+