ALLOY COMPUTER PRODUCTS, INC.
EARTHNET-1
|
NIC Type |
Arcnet |
|
Transfer Rate |
2.5Mbps |
|
Data Bus |
8-bit ISA |
|
Topology |
Star |
|
Wiring Type |
RG-62A/U 93ohm coaxial |
|
Boot ROM |
Available |
|
NODE ADDRESS SELECTION |
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|
Address |
SW2/1 |
SW2/2 |
SW2/3 |
SW2/4 |
SW2/5 |
SW2/6 |
SW2/7 |
SW2/8 |
|
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 |
|
5 |
Off |
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 |
Note: A total of 255 node address settings are available. The switches are a binary representation of the decimal node addresses. switch SW2/1 is the Least Significant Bit and jumper SW2/8 is the Most Significant Bit. The switches have the following decimal values: jumper SW2/1=1, SW2/2=2, SW2/3=4, SW2/4=8, SW2/5=16, SW2/6=32, SW2/7=64, SW2/8=128.Open the switches and add the values of the open jumpers to obtain the correct node address. (On=0, Off=1) |
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|
BASE I/O ADDRESS SELECTION |
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|
Address |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
|
|
|
2E0h |
Off |
Off |
Off |
Off |
Off |
On |
|
200h |
Off |
On |
On |
On |
On |
On |
|
|
210h |
Off |
On |
On |
On |
On |
Off |
|
|
220h |
Off |
On |
On |
On |
Off |
On |
|
|
230h |
Off |
On |
On |
On |
Off |
Off |
|
|
240h |
Off |
On |
On |
Off |
On |
On |
|
|
3B0h |
Off |
Off |
Off |
On |
Off |
Off |
|
|
3C0h |
Off |
Off |
Off |
Off |
On |
On |
|
|
3D0h |
Off |
Off |
Off |
Off |
On |
Off |
|
|
3E0h |
Off |
Off |
Off |
Off |
Off |
On |
|
|
3F0h |
Off |
Off |
Off |
Off |
Off |
Off |
|
|
Note: Addresses from 0h to 3F0h are possible, but those below 200h are not normally used. The sum of SW1/1 and SW1/2 represent the first digit. The sum of SW1/3-6 represent the second digit. The last digit is always zero. SW1/1=200h, SW1/2=100h, SW1/3=80h, SW1/4=40h, SW1/5=20h, SW/6=10h. |
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|
INTERRUPT SELECTION |
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|
IRQ |
JP2/1 |
JP2/2 |
JP2/3 |
JP2/4 |
JP2/5 |
|
|
|
2 |
Closed |
Open |
Open |
Open |
Open |
|
3 |
Open |
Closed |
Open |
Open |
Open |
|
|
4 |
Open |
Open |
Closed |
Open |
Open |
|
|
5 |
Open |
Open |
Open |
Closed |
Open |
|
|
7 |
Open |
Open |
Open |
Open |
Closed |
|
|
SHARED RAM ADDRESS |
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|
Address |
SW1/7 |
SW1/8 |
SW1/9 |
SW1/10 |
JP1/1 |
JP1/2 |
JP1/3 |
JP1/4 |
|
A0000h |
Off |
On |
Off |
On |
Open |
Open |
Open |
Open |
|
A4000h |
Off |
On |
Off |
On |
Open |
Open |
Closed |
Open |
|
A8000h |
Off |
On |
Off |
On |
Open |
Open |
Open |
Closed |
|
B0000h |
Off |
On |
Off |
Off |
Open |
Open |
Open |
Open |
|
B4000h |
Off |
On |
Off |
Off |
Open |
Open |
Closed |
Open |
|
B8000h |
Off |
On |
Off |
Off |
Open |
Open |
Open |
Closed |
|
C0000h |
Off |
Off |
On |
On |
Open |
Open |
Open |
Open |
|
C4000h |
Off |
Off |
On |
On |
Open |
Open |
Closed |
Open |
|
C8000h |
Off |
Off |
On |
On |
Open |
Open |
Open |
Closed |
|
D0000h |
Off |
Off |
On |
Off |
Open |
Open |
Open |
Open |
|
D4000h |
Off |
Off |
On |
Off |
Open |
Open |
Closed |
Open |
|
D8000h |
Off |
Off |
On |
Off |
Open |
Open |
Open |
Closed |
|
E0000h |
Off |
Off |
Off |
On |
Open |
Open |
Open |
Open |
|
E4000h |
Off |
Off |
Off |
On |
Open |
Open |
Closed |
Open |
|
E8000h |
Off |
Off |
Off |
On |
Open |
Open |
Open |
Closed |
|
DIAGNOSTIC LED(S) |
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|
LED |
Color |
Status |
Condition |
|
LED1 |
Unidentified |
On |
Data is being transmitted/received |
|
LED1 |
Unidentified |
Off |
Data is not being transmitted/received |
|
LED2 |
Unidentified |
On |
Network connection is good |
|
LED2 |
Unidentified |
Off |
Network connection is broken |
|
Note: Continuous pulsing of LED2 indicates network error or node address conflict. |
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