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# DIGI INTERNATIONAL, INC.
PC/4
Card Type Serial card
Chip Set Unidentified
Maximum Onboard Memory Unidentified
I/O Options Serial ports (4 RS-232),
Hard Drives supported None
Floppy drives supported None
Data Bus 8-bit ISA
Card Size Full-length
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|---------------------+--------+--------------------+--------|
| 78-pin cable | CN1 | Daisy chain cable | P2 |
| connector | | connector | |
|---------------------+--------+--------------------+--------|
| Daisy chain cable | P1 | | |
| connector | | | |
|------------------------------------------------------------|
| Note: Pins 2 & 3 of connectors P1 & P2 are closed when in |
| single board configuration. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------------+--------+----------|
| » | Factory configured - do not alter | DS1/8 | On |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | DS1/9 | On |
|---+------------------------------------+--------+----------|
| | Interrupt status register enabled | DS1/10 | On |
|---+------------------------------------+--------+----------|
| | Interrupt status register disabled | DS1/10 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT ENABLING SELECTION |
|------------------------------------------------------------|
| Port | Label | Position |
|--------------------------------------+-------+-------------|
| Port 1 enabled | DS2/8 | On |
|--------------------------------------+-------+-------------|
| Port 1 disabled | DS2/8 | Off |
|--------------------------------------+-------+-------------|
| Port 2 enabled | DS3/8 | On |
|--------------------------------------+-------+-------------|
| Port 2 disabled | DS3/8 | Off |
|--------------------------------------+-------+-------------|
| Port 3 enabled | DS4/8 | On |
|--------------------------------------+-------+-------------|
| Port 3 disabled | DS4/8 | Off |
|--------------------------------------+-------+-------------|
| Port 4 enabled | DS5/8 | On |
|--------------------------------------+-------+-------------|
| Port 4 disabled | DS5/8 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BOARD INDENTIFICATION SELECTION |
|------------------------------------------------------------|
| ID | J9 | J10 |
|-----------------+---------------------+--------------------|
| » | Board 0 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|-----+-----------+---------------------+--------------------|
| | Board 1 | Pins 2 & 3 closed | Pins 1 & 2 closed |
|-----+-----------+---------------------+--------------------|
| | Board 2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
|-----+-----------+---------------------+--------------------|
| | Board 3 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: The primary board in the daisy chain must remain on |
| the default setting. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTTERRUPT STATUS REGISTER BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | DS1/1 | DS1/2 | DS1/3 |DS1/4 |DS1/5 |DS1/6 |DS1/7|
|---------+-------+-------+-------+------+------+------+-----|
| 000h | On | On | On | On | On | On | On |
|---------+-------+-------+-------+------+------+------+-----|
| 008h | On | On | On | On | On | On | Off |
|---------+-------+-------+-------+------+------+------+-----|
| 010h | On | On | On | On | On | Off | On |
|---------+-------+-------+-------+------+------+------+-----|
| 018h | On | On | On | On | On | Off | Off |
|---------+-------+-------+-------+------+------+------+-----|
| 020h | On | On | On | On | Off | On | On |
|---------+-------+-------+-------+------+------+------+-----|
| 3D8h | Off | Off | Off | Off | On | Off | Off |
|---------+-------+-------+-------+------+------+------+-----|
| 3E0h | Off | Off | Off | Off | Off | On | On |
|---------+-------+-------+-------+------+------+------+-----|
| 3E8h | Off | Off | Off | Off | Off | On | Off |
|---------+-------+-------+-------+------+------+------+-----|
| 3F0h | Off | Off | Off | Off | Off | Off | On |
|---------+-------+-------+-------+------+------+------+-----|
| 3F8h | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
|Note: A total of 128 base address settings are available. |
|The switches are a binary representation of the decimal |
|memory addresses. DS1/1 is the Most Significant Bit and |
|switch DS1/7 is the Least Significant Bit. The switches have|
|the following decimal values:DS1/1=512, DS1/2=256, |
|DS1/3=128, DS1/4=64, DS1/5=32, DS1/6=16, DS1/7=8. Turn off |
|the switches and add the values of the switches to obtain |
|the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT 1 BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | DS2/1 | DS2/2 |DS2/3 |DS2/4 |DS2/5 |DS2/6 |DS2/7 |
|---------+-------+-------+------+------+------+------+------|
| 000h | On | On | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 008h | On | On | On | On | On | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 010h | On | On | On | On | On | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 018h | On | On | On | On | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 020h | On | On | On | On | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3D8h | Off | Off | Off | Off | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3E0h | Off | Off | Off | Off | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3E8h | Off | Off | Off | Off | Off | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 3F0h | Off | Off | Off | Off | Off | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 3F8h | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
|Note: A total of 128 base address settings are available. |
|The switches are a binary representation of the decimal |
|memory addresses. DS2/1 is the Most Significant Bit and |
|switch DS2/7 is the Least Significant Bit. The switches have|
|the following decimal values:DS2/1=512, DS2/2=256, |
|DS2/3=128, DS2/4=64, DS2/5=32, DS2/6=16, DS2/7=8. Turn off |
|the switches and add the values of the switches to obtain |
|the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT 2 BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | DS3/1 | DS3/2 |DS3/3 |DS3/4 |DS3/5 |DS3/6 |DS3/7 |
|---------+-------+-------+------+------+------+------+------|
| 000h | On | On | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 008h | On | On | On | On | On | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 010h | On | On | On | On | On | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 018h | On | On | On | On | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 020h | On | On | On | On | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3D8h | Off | Off | Off | Off | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3E0h | Off | Off | Off | Off | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3E8h | Off | Off | Off | Off | Off | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 3F0h | Off | Off | Off | Off | Off | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 3F8h | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
|Note: A total of 128 base address settings are available. |
|The switches are a binary representation of the decimal |
|memory addresses. DS3/1 is the Most Significant Bit and |
|switch DS3/7 is the Least Significant Bit. The switches have|
|the following decimal values:DS3/1=512, DS3/2=256, |
|DS3/3=128, DS3/4=64, DS3/5=32, DS3/6=16, DS3/7=8. Turn off |
|the switches and add the values of the switches to obtain |
|the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT 3 BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | DS4/1 | DS4/2 |DS4/3 |DS4/4 |DS4/5 |DS4/6 |DS4/7 |
|---------+-------+-------+------+------+------+------+------|
| 000h | On | On | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 008h | On | On | On | On | On | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 010h | On | On | On | On | On | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 018h | On | On | On | On | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 020h | On | On | On | On | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3D8h | Off | Off | Off | Off | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3E0h | Off | Off | Off | Off | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3E8h | Off | Off | Off | Off | Off | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 3F0h | Off | Off | Off | Off | Off | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 3F8h | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
|Note: A total of 128 base address settings are available. |
|The switches are a binary representation of the decimal |
|memory addresses. DS4/1 is the Most Significant Bit and |
|switch DS4/7 is the Least Significant Bit. The switches have|
|the following decimal values:DS4/1=512, DS4/2=256, |
|DS4/3=128, DS4/4=64, DS4/5=32, DS4/6=16, DS4/7=8. Turn off |
|the switches and add the values of the switches to obtain |
|the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT 4 BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | DS5/1 | DS5/2 |DS5/3 |DS5/4 |DS5/5 |DS5/6 |DS5/7 |
|---------+-------+-------+------+------+------+------+------|
| 000h | On | On | On | On | On | On | On |
|---------+-------+-------+------+------+------+------+------|
| 008h | On | On | On | On | On | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 010h | On | On | On | On | On | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 018h | On | On | On | On | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 020h | On | On | On | On | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3D8h | Off | Off | Off | Off | On | Off | Off |
|---------+-------+-------+------+------+------+------+------|
| 3E0h | Off | Off | Off | Off | Off | On | On |
|---------+-------+-------+------+------+------+------+------|
| 3E8h | Off | Off | Off | Off | Off | On | Off |
|---------+-------+-------+------+------+------+------+------|
| 3F0h | Off | Off | Off | Off | Off | Off | On |
|---------+-------+-------+------+------+------+------+------|
| 3F8h | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
|Note: A total of 128 base address settings are available. |
|The switches are a binary representation of the decimal |
|memory addresses. DS5/1 is the Most Significant Bit and |
|switch DS5/7 is the Least Significant Bit. The switches have|
|the following decimal values:DS5/1=512, DS5/2=256, |
|DS5/3=128, DS5/4=64, DS5/5=32, DS5/6=16, DS5/7=8. Turn off |
|the switches and add the values of the switches to obtain |
|the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | J85 | J86 | J87 | J88 | J89 | J90 |
|------+--------+--------+--------+--------+--------+--------|
| IRQ2 | Open | Open | Open | Open | Open | Closed |
|------+--------+--------+--------+--------+--------+--------|
| IRQ3 | Closed | Open | Open | Open | Open | Open |
|------+--------+--------+--------+--------+--------+--------|
| IRQ4 | Open | Open | Open | Open | Closed | Open |
|------+--------+--------+--------+--------+--------+--------|
| IRQ5 | Open | Closed | Open | Open | Open | Open |
|------+--------+--------+--------+--------+--------+--------|
| IRQ6 | Open | Open | Open | Closed | Open | Open |
|------+--------+--------+--------+--------+--------+--------|
| IRQ7 | Open | Open | Closed | Open | Open | Open |
|------------------------------------------------------------|
| Note: Ports 1-4 must be set to accept either an odd or |
| even interrupt. J1-J4 corresponds to ports 1-4. Place |
| jumper on pins 1 & 2 for an odd interrupt or pins 2 & 3 |
| for an even interrupt. |
+------------------------------------------------------------+