(TXT) View Source
       
       # GATEWAY COMMUNICATIONS, INC.
       
          G/NET (REV.02 AND BELOW)
       
          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-62A/U 93ohm coaxial                        
          Boot ROM         Not available (optional card required)        
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        NODE ADDRESS                        |
          |------------------------------------------------------------|
          |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)                                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |               Type                |          JP1           |
          |-----------------------------------+------------------------|
          | » | RG11/U 75ohm or RG-59/U 75ohm |         Closed         |
          |---+-------------------------------+------------------------|
          |   |        RG-62A/U 93ohm         |          Open          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |       IRQ        |        JP2         |        JP3         |
          |------------------+--------------------+--------------------|
          | » |      4       | Pins 2 & 3 closed  |   All pins open    |
          |---+--------------+--------------------+--------------------|
          |   |      2       |   All pins open    | Pins 2 & 3 closed  |
          |---+--------------+--------------------+--------------------|
          |   |      3       | Pins 1 & 2 closed  |   All pins open    |
          |---+--------------+--------------------+--------------------|
          |   |      5       |   All pins open    | Pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 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-2FFh  |   Off    |   Off    |   Off    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 200h-21Fh  |    On    |    On    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 220h-23Fh  |   Off    |    On    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 240h-25Fh  |    On    |   Off    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 260h-27Fh  |   Off    |   Off    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 280h-29Fh  |    On    |    On    |   Off    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 2A0h-2BFh  |   Off    |    On    |   Off    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 2D0h-2DFh  |    On    |    On    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   | 300h-31Fh  |    On    |    On    |    On    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 320h-33Fh  |   Off    |    On    |    On    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 340h-35Fh  |    On    |   Off    |    On    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 360h-37Fh  |   Off    |   Off    |    On    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 380h-39Fh  |    On    |    On    |   Off    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 3A0h-3BFh  |   Off    |    On    |   Off    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 3C0h-3DFh  |    On    |   Off    |   Off    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   | 3E0h-3FFh  |   Off    |   Off    |   Off    |   Off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CONNECTORS                         |
          |------------------------------------------------------------|
          |            Purpose            |          Location          |
          |-------------------------------+----------------------------|
          |      Piggy-back Keycard       |            CN1             |
          +------------------------------------------------------------+