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 |
