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# TOP MICROSYSTEMS, INC.
TOP/ARC-30 TWISTED PAIR
NIC Type ARCnet
Transfer Rate 2.5Mbps
Data Bus 8-bit ISA
Topology Star
Linear bus
Wiring Type 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) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CABLE LENGTH AND RESPONSE/RECONFIGURATION TIMEOUTS |
|------------------------------------------------------------|
| Cable | Response | Reconfiguration | JP1 | JP2 |
| Length | Time | Time | | |
|------------+----------+------------------+--------+--------|
| » | < | 74.7µs | 840ms | Open | Open |
| | 20,000 | | | | |
| | feet | | | | |
|---+--------+----------+------------------+--------+--------|
| | > | 283.4µs | 1680ms | Closed | Open |
| | 20,000 | | | | |
| | feet | | | | |
|---+--------+----------+------------------+--------+--------|
| | > | 561.8µs | 1680ms | Open | Closed |
| | 20,000 | | | | |
| | feet | | | | |
|---+--------+----------+------------------+--------+--------|
| | > | 1118.6µs | 1680ms | Closed | Closed |
| | 20,000 | | | | |
| | feet | | | | |
|------------------------------------------------------------|
| Note: All NICs on the network must have this option set |
| the same. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BOOT ROM |
|------------------------------------------------------------|
| Setting | JP3 |
|----------------------------------------+-------------------|
| » | Disabled | Open |
|---------------+------------------------+-------------------|
| | Enabled | Closed |
|------------------------------------------------------------|
| Note:A 2732 or 2764 boot ROM may be used in the boot ROM |
| socket. If a 2732 is used, the chip must be |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT REQUEST |
|------------------------------------------------------------|
| IRQ | JP4 | JP5 | JP6 | JP7 | JP8 |
|---------+----------+---------+---------+---------+---------|
| » | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O BASE ADDRESS |
|------------------------------------------------------------|
| Address | SW1/1 | SW1/2 | SW1/3 |
|-------------------+-------------+-------------+------------|
| | 260-26Fh | On | On | On |
|---+---------------+-------------+-------------+------------|
| | 290-29Fh | On | On | Off |
|---+---------------+-------------+-------------+------------|
| » | 2E0-2EFh | On | Off | On |
|---+---------------+-------------+-------------+------------|
| | 2F0-2FFh | On | Off | Off |
|---+---------------+-------------+-------------+------------|
| | 300-30Fh | Off | On | On |
|---+---------------+-------------+-------------+------------|
| | 350-35Fh | Off | On | Off |
|---+---------------+-------------+-------------+------------|
| | 380-38Fh | Off | Off | On |
|---+---------------+-------------+-------------+------------|
| | 3E0-3EFh | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE MEMORY ADDRESS & BOOT ROM ADDRESS |
|------------------------------------------------------------|
| Base Address | Boot ROM |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8 |
|--------------+----------+------+------+------+------+------|
| | C0000h | C2000h | On | On | On | On | On |
|---+----------+----------+------+------+------+------+------|
| | C0800h | C2000h | On | On | On | On | Off |
|---+----------+----------+------+------+------+------+------|
| | C1000h | C2000h | On | On | On | Off | On |
|---+----------+----------+------+------+------+------+------|
| | C1800h | C2000h | On | On | On | Off | Off |
|---+----------+----------+------+------+------+------+------|
| | C4000h | C6000h | On | On | Off | On | On |
|---+----------+----------+------+------+------+------+------|
| | C4800h | C6000h | On | On | Off | On | Off |
|---+----------+----------+------+------+------+------+------|
| | C5000h | C6000h | On | On | Off | Off | On |
|---+----------+----------+------+------+------+------+------|
| | C5800h | C6000h | On | On | Off | Off | Off |
|---+----------+----------+------+------+------+------+------|
| | CC000h | CE000h | On | Off | On | On | On |
|---+----------+----------+------+------+------+------+------|
| | CC800h | CE000h | On | Off | On | On | Off |
|---+----------+----------+------+------+------+------+------|
| | CD000h | CE000h | On | Off | On | Off | On |
|---+----------+----------+------+------+------+------+------|
| | CD800h | CE000h | On | Off | On | Off | Off |
|---+----------+----------+------+------+------+------+------|
|» | D0000h | D2000h | On | Off | Off | On | On |
|---+----------+----------+------+------+------+------+------|
| | D0800h | D2000h | On | Off | Off | On | Off |
|---+----------+----------+------+------+------+------+------|
| | D1000h | D2000h | On | Off | Off | Off | On |
|---+----------+----------+------+------+------+------+------|
| | D1800h | D2000h | On | Off | Off | Off | Off |
|---+----------+----------+------+------+------+------+------|
| | D4000h | D6000h | Off | On | On | On | On |
|---+----------+----------+------+------+------+------+------|
| | D4800h | D6000h | Off | On | On | On | Off |
|---+----------+----------+------+------+------+------+------|
| | D5000h | D6000h | Off | On | On | Off | On |
|---+----------+----------+------+------+------+------+------|
| | D5800h | D6000h | Off | On | On | Off | Off |
|---+----------+----------+------+------+------+------+------|
| | D8000h | DA000h | Off | On | Off | On | On |
|---+----------+----------+------+------+------+------+------|
| | D8800h | DA000h | Off | On | Off | On | Off |
|---+----------+----------+------+------+------+------+------|
| | D9000h | DA000h | Off | On | Off | Off | On |
|---+----------+----------+------+------+------+------+------|
| | D9800h | DA000h | Off | On | Off | Off | Off |
|---+----------+----------+------+------+------+------+------|
| | DC000h | DE000h | Off | Off | On | On | On |
|---+----------+----------+------+------+------+------+------|
| | DC800h | DE000h | Off | Off | On | On | Off |
|---+----------+----------+------+------+------+------+------|
| | DD000h | DE000h | Off | Off | On | Off | On |
|---+----------+----------+------+------+------+------+------|
| | DD800h | DE000h | Off | Off | On | Off | Off |
|---+----------+----------+------+------+------+------+------|
| | E0000h | E2000h | Off | Off | Off | On | On |
|---+----------+----------+------+------+------+------+------|
| | E0800h | E2000h | Off | Off | Off | On | Off |
|---+----------+----------+------+------+------+------+------|
| | E1000h | E2000h | Off | Off | Off | Off | On |
|---+----------+----------+------+------+------+------+------|
| | E1800h | E2000h | Off | Off | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS NOTES |
|------------------------------------------------------------|
| This card may be used in a star topology by terminating |
| one of the RJ-11 jacks. |
+------------------------------------------------------------+