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# 3COM CORPORATION
ETHERLINK PLUS (3C505; ASSY.#1194)
NIC Type Ethernet
Transfer Rate 10Mbps
Data Bus 16-bit ISA
Topology Linear Bus
Wiring Type RG--58A/U 50ohm coaxial
AUI transceiver via DB-15 port
Boot ROM Available
IMG IMG 1
+------------------------------------------------------------+
| CABLE TYPE |
|------------------------------------------------------------|
| Type | U54 | U55 |
|------------------------------------+-----------+-----------|
| » | RG--58A/U 50ohm coaxial | Installed | Open |
|---+--------------------------------+-----------+-----------|
| | AUI transceiver via DB-15 port | Open | Installed |
+------------------------------------------------------------+
+--------------------------------------------------------------------------------+
| INTERRUPT REQUEST SELECTION |
|--------------------------------------------------------------------------------|
|IRQ| JP27 | JP28 | JP29 | JP30 | JP31 | JP32 | JP33 | JP34 | JP35 | JP36 | JP37 |
|---+------+------+------+------+------+------+------+------+------+------+------|
| 2 | 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 |
|---+------+------+------+------+------+------+------+------+------+------+------|
|12 | Open | Open |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|---+------+------+------+------+------+------+------+------+------+------+------|
|14 | Open |Closed| Open | Open | Open | Open | Open | Open | Open | Open | Open |
|---+------+------+------+------+------+------+------+------+------+------+------|
|15 |Closed| Open | Open | Open | Open | Open | Open | Open | Open | Open | Open |
+--------------------------------------------------------------------------------+
+------------------------------------------------------------+
| I/O BASE ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | JP4 | JP5 | JP6 | JP7 | JP8 | JP9 |
|---------+--------+--------+--------+-------+-------+-------|
| 200h | Pins 1 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 2 | & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 210h | Pins 2 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 2 | & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------+--------+--------+--------+-------+-------+-------|
| 220h | Pins 1 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 3 | & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 230h | Pins 2 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 3 | & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 240h | Pins 1 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 2 | & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 250h | Pins 2 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 2 | & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 260h | Pins 1 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 3 | & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 270h | Pins 2 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 3 | & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 280h | Pins 1 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 2 | & 2 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 290h | Pins 2 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 2 | & 2 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 2A0h | Pins 1 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 3 | & 2 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 2B0h | Pins 2 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 3 | & 2 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 2C0h | Pins 1 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 2 | & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 2D0h | Pins 2 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 2 | & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 2E0h | Pins 1 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 3 | & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 2F0h | Pins 2 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 3 | & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 300h | Pins 1 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 2 | & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 310h | Pins 2 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 2 | & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 320h | Pins 1 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 3 | & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 330h | Pins 2 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 3 | & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 340h | Pins 1 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 2 | & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 350h | Pins 2 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 2 | & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 360h | Pins 1 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 3 | & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 370h | Pins 2 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 2 | & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 380h | Pins 1 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 2 | & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 390h | Pins 2 | Pins 1 | Pins 1 | Pins | Pins | Pins |
| | & 3 | & 2 | & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 3A0h | Pins 1 | Pins 2 | Pins 1 | Pins | Pins | Pins |
| | & 2 | & 3 | & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 3B0h | Pins 1 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 3 | & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 3C0h | Pins 1 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 2 | & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 3D0h | Pins 2 | Pins 1 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 2 | & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 3E0h | Pins 1 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 2 | & 3 | & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------+--------+--------+--------+-------+-------+-------|
| 3F0h | Pins 2 | Pins 2 | Pins 2 | Pins | Pins | Pins |
| | & 3 | & 3 | & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BOOT ROM CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP12 |
|--------------------------------+---------------------------|
| » | Disabled | Pins 1 & 2 Closed |
|------------+-------------------+---------------------------|
| | Enabled | Pins 2 & 3 Closed |
|------------------------------------------------------------|
| Note:JP12 is located at the bottom of the JP12-JP19 jumper |
| block. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL |
|------------------------------------------------------------|
|Channel | JP20 |JP21 | JP22 | JP23 | JP24 | JP25 |JP26 |
|--------+-------+-----+-------+-------+-------+-------+-----|
| DMA1 |Closed |Open | Open | Open | Open | Open |Open |
|--------+-------+-----+-------+-------+-------+-------+-----|
| DMA3 | Open |Open |Closed | Open | Open | Open |Open |
|--------+-------+-----+-------+-------+-------+-------+-----|
| DMA5 | Open |Open | Open | Open | Open |Closed |Open |
|--------+-------+-----+-------+-------+-------+-------+-----|
| DMA6 | Open |Open | Open | Open |Closed | Open |Open |
|--------+-------+-----+-------+-------+-------+-------+-----|
| DMA7 | Open |Open | Open |Closed | Open | Open |Open |
|------------------------------------------------------------|
|Note:Closing a single jumper requires two jumper shunts to |
|cover all four pins. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BOOT ROM ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | JP13 | JP14 | JP15 | JP16 | JP17 | JP18 | JP19 |
|---------+-------+-------+------+------+------+------+------|
| CC000h | Pins | Pins | Pins | Pins | Pins | Pins | Pins |
| | 2 & 3 | 1 & 2 | 1 & | 2 & | 2 & | 1 & | 1 & |
| | | | 2 | 3 | 3 | 2 | 2 |
|---------+-------+-------+------+------+------+------+------|
| EC000h | Pins | Pins | Pins | Pins | Pins | Pins | Pins |
| | 2 & 3 | 2 & 3 | 1 & | 2 & | 2 & | 1 & | 1 & |
| | | | 2 | 3 | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note:Jumpers are labeled from the bottom to the top of the |
| card. |
| |
| Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY CONFIGURED SETTINGS |
|------------------------------------------------------------|
| Jumper | Setting |
|----------------------------+-------------------------------|
| JP1 | Pins 2 & 3 Closed |
|----------------------------+-------------------------------|
| JP2 | Pins 1 & 2 Closed |
+------------------------------------------------------------+