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# THOMAS-CONRAD CORPORATION
TC6245-OTP(ORDINARY TWISTED PAIR)
NIC Type ARCnet
Transfer Rate 2.5Mbps
Data Bus 16-bit ISA
Topology Star
Linear Bus
Wiring Type Shielded twisted pair
Unshielded twisted pair
Boot ROM Available
(IMG) IMG 1
+------------------------------------------------------------+
| NODE ADDRESS |
|------------------------------------------------------------|
|Node |SW2/1 |SW2/2 |SW2/3 |SW2/4 |SW2/5 |SW2/6 |SW2/7 |SW2/8|
|-----+------+------+------+------+------+------+------+-----|
| 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 |
|------------------------------------------------------------|
|Note: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) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESPONSE AND RECONFIGURATION TIMEOUT ||
|-----------------------------------------------------------||
| Network Cable | JP12 | JP13 |ResponseTime|Reconfiguration||
| Length | | | ( m | Time (mS) ||
|---------------+-------+------+------------+---------------||
|»| Less than | Open | Open | 74.7 | 840 ||
| | 20,000 feet | | | | ||
|-+-------------+-------+------+------------+---------------||
| | more than |Closed | Open | 283.4 | 1680 ||
| | 20,000 feet | | | | ||
|-+-------------+-------+------+------------+---------------||
| | more than | Open |Closed| 561.8 | 1680 ||
| | 20,000 feet | | | | ||
|-+-------------+-------+------+------------+---------------||
| | more than |Closed |Closed| 1118.6 | 1680 ||
| | 20,000 feet | | | | ||
|-+----------------------------------------------------------|
| |Note : All NICs on the network must have these two jumpers|
| |set the same. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE MEMORY ADDRESS |
|------------------------------------------------------------|
| Memory | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 |
| Address | | | | | | |
|------------+-------+-------+-------+-------+-------+-------|
| » | D000h | Off | Off | On | Off | On | On |
|---+--------+-------+-------+-------+-------+-------+-------|
| | C000h | Off | Off | On | On | On | On |
|---+--------+-------+-------+-------+-------+-------+-------|
| | C400h | Off | Off | On | On | On | Off |
|---+--------+-------+-------+-------+-------+-------+-------|
| | C800h | Off | Off | On | On | Off | On |
|---+--------+-------+-------+-------+-------+-------+-------|
| | CC00h | Off | Off | On | On | Off | Off |
|---+--------+-------+-------+-------+-------+-------+-------|
| | D400h | Off | Off | On | Off | On | Off |
|---+--------+-------+-------+-------+-------+-------+-------|
| | D800h | Off | Off | On | Off | Off | On |
|---+--------+-------+-------+-------+-------+-------+-------|
| | DC00h | Off | Off | On | Off | Off | Off |
+------------------------------------------------------------+
+---------------------------------------------------------------------------------+
| INTERRUPT REQUEST |
|---------------------------------------------------------------------------------|
|IRQ | JP1 | JP2 | JP3 | JP4 | JP5 | JP20 | JP21 | JP22 | JP23 | JP24 | JP25 |
|----+------+------+------+------+------+------+------+------+------+------+------|
|»|9 | Open | Open | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |3 | Open | Open | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |4 | Open | Open | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |5 | Open | Open | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |6 | Open | Open | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |7 | Open | Open | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |10| Open | Open | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |11| Open | Open | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |13| Open | Open |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |14|Closed| Open | Open | Open | Open | Open | Open | Open | Open | Open | Open |
|-+--+------+------+------+------+------+------+------+------+------+------+------|
| |15| Open |Closed| Open | Open | Open | Open | Open | Open | Open | Open | Open |
+---------------------------------------------------------------------------------+
+------------------------------------------------------------+
| WAIT STATE |
|------------------------------------------------------------|
| Setting | SW1/7 |
|-----------------------------------+------------------------|
| » | Zero wait states disabled | On |
|---+-------------------------------+------------------------|
| | Zero wait states enabled | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPATABILITY MODE |
|------------------------------------------------------------|
| Mode | SW1/8 |
|-------------------------------------------+----------------|
| » | Enhanced mode | On |
|------------+------------------------------+----------------|
| | Compatible mode | Off |
|------------------------------------------------------------|
| Note: Enhanced mode optimizes performance and minimizes |
| conflicts of your hardware, by using a Thomas-Conrad |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BLOCK DECODE |
|------------------------------------------------------------|
| Size | JP7 |
|-------------------------------------+----------------------|
| » | 16K memory block decode | Pins 1 & 2 Closed |
|------+------------------------------+----------------------|
| | 128K memory block decode | Pins 2 & 3 Closed |
|------------------------------------------------------------|
| Note:A 16-bit VGA adapter typically decodes base memory |
| in 128K blocks. If you are installing the NIC in a |
| system with such a card, you may need to set the NIC |
| block decode size to 128K. If you set the block decode |
| size to 128K then all other adapters in the system must |
| also utilize 128K decode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O BASE ADDRESS |
|------------------------------------------------------------|
| I/O |SW3/1 |SW3/2 |SW3/3 |SW3/4 |SW3/5 |SW3/6|SW3/7|SW3/8|
|-------+------+------+------+------+------+-----+-----+-----|
|»|2E0h | On | On | Off | On | Off | Off | Off | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |2F0h | On | On | Off | On | Off | Off | Off | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |300h | On | On | Off | Off | On | On | On | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |310h | On | On | Off | Off | On | On | On | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |320h | On | On | Off | Off | On | On | Off | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |330h | On | On | Off | Off | On | On | Off | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |340h | On | On | Off | Off | On | Off | On | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |350h | On | On | Off | Off | On | Off | On | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |360h | On | On | Off | Off | On | Off | Off | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |370h | On | On | Off | Off | On | Off | Off | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |380h | On | On | Off | Off | Off | On | On | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |390h | On | On | Off | Off | Off | On | On | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |3A0h | On | On | Off | Off | Off | On | Off | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |3B0h | On | On | Off | Off | Off | On | Off | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |3C0h | On | On | Off | Off | Off | Off | On | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |3D0h | On | On | Off | Off | Off | Off | On | Off |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |3E0h | On | On | Off | Off | Off | Off | Off | On |
|-+-----+------+------+------+------+------+-----+-----+-----|
| |3F0h | On | On | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
|Note: When operating in enhanced mode it is not necessary to|
|set the I/O address. |
+------------------------------------------------------------+
(IMG) IMG 2
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| 1 | Red | On | Data is being transmitted or |
| | | | receiving |
|-----+-------+----------+-----------------------------------|
| 1 | Green | On | Card is not configured correctly |
|-----+-------+----------+-----------------------------------|
| 2 | Green | Blinking | Card is configured correctly and |
| | | | is connected to network |
|-----+-------+----------+-----------------------------------|
| 2 | N/A | Off | Card is defective or not |
| | | | connected to network |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS NOTES |
|------------------------------------------------------------|
| Note:Not all components are as shown on later card |
| revisions. |
+------------------------------------------------------------+