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) |
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 |