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# BLACK BOX CORPORATION
PC422/485
Card Type Serial card
Chip Set Unidentified
Maximum Onboard Memory None
I/O Options Serial port
Data Bus 8-bit ISA
Floppy drives supported None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label |
|-------------------------------+----------------------------|
| 25-pin serial port | J2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| Serial port select IRQ3 (COM2) | E1 | Pins 1 & 2 |
| | | closed |
|------------------------------------+-------+---------------|
| Serial port select IRQ4 (COM4) | E1 | Pins 2 & 3 |
| | | closed |
|------------------------------------+-------+---------------|
| Serial port driver RTS enabled | E2 | Closed |
|------------------------------------+-------+---------------|
| Serial port driver always enabled | E2 | Open |
|------------------------------------+-------+---------------|
| Serial port select XT-J8 slot | E3 | Closed |
|------------------------------------+-------+---------------|
| Serial port select all other slots | E3 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
|Address| S1/1 | S1/2 | S1/3 | S1/4 | S1/5 |S1/6 |S1/7 |S1/8 |
|-------+------+------+------+------+------+-----+-----+-----|
| 238h | On | Off | Off | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 2B8h | Off | On | Off | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 338h | Off | Off | On | Off | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 3B8h | Off | Off | Off | On | Off | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 278h | Off | Off | Off | Off | On | Off | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 2F8h | Off | Off | Off | Off | Off | On | Off | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 378h | Off | Off | Off | Off | Off | Off | On | Off |
|-------+------+------+------+------+------+-----+-----+-----|
| 3F8h | Off | Off | Off | Off | Off | Off | Off | On |
+------------------------------------------------------------+