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# 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
IMG IMG 1
+------------------------------------------------------------+
| NODE ADDRESS SELECTION |
|------------------------------------------------------------|
|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) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| 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 |
|------------------------------------------------------------|
|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) |
|------------------------------------------------------------|
| 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. |
+------------------------------------------------------------+