THOMAS-CONRAD CORPORATION
TC6842 (FOR THE MACINTOSH)
|
NIC Type |
ARCnet |
|
Transfer Rate |
2.5Mbps |
|
Data Bus |
32-Bit NuBus |
|
Topology |
Star |
|
Wiring Type |
RG62/U 93ohm coaxial |
|
Boot ROM |
Not Available |
|
NODE ADDRESS |
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|
Node |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
SW1/7 |
SW1/8 |
|
|
|
1 |
Off |
On |
On |
On |
On |
On |
On |
On |
|
|
0 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
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 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
255 |
- |
- |
- |
- |
- |
- |
- |
- |
Note:Node address 0 is used for messaging between nodes and must not be used. Node addresses 254 &255 are reserved for AppleTalk network broadcast messages and also must not be used. A total of 253 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) |
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|
CABLE LENGTH AND RESPONSE/RECONFIGURATION TIMEOUTS |
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|
Cable Length |
Response Time |
Reconfiguration |
JP1 |
JP2 |
|
|
|
< 20,000 feet |
74.7 m s |
840ms |
Open |
Open |
|
|
> 20,000 feet |
283.4 m s |
1680ms |
Closed |
Open |
|
|
> 20,000 feet |
561.8 m s |
1680ms |
Open |
Closed |
|
|
> 20,000 feet |
1118.6 m s |
1680ms |
Closed |
Closed |
|
Note: All NICs on the network must have this option set the same. |
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