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# BOCA RESEARCH, INC.
IOAT55
Card Type Multi I/O card
Chipset/Controller 16C550
I/O Options Parallel port, serial ports (2)
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | Serial port 2 | CN3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| Port 1 | J5 | Port 2 | J5 |
| (CN1) | | (CN3) | |
|------------+------------------+----------+-----------------|
| » | COM1 | Pins 13 & 14 | COM2 | Pins 2 & 3 |
| | | closed | | closed |
|---+--------+------------------+----------+-----------------|
| | COM2 | Pins 14 & 15 | COM1 | Pins 1 & 2 |
| | | closed | | closed |
|---+--------+------------------+----------+-----------------|
| | COM3 | Pins 16 & 17 | COM3 | Pins 4 & 5 |
| | | closed | | closed |
|---+--------+------------------+----------+-----------------|
| | COM4 | Pins 17 & 18 | COM4 | Pins 5 & 6 |
| | | closed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| Port 1 | J5 | Port 2 | J5 |
| (CN1) | | (CN3) | |
|------------+------------------+----------+-----------------|
| » | IRQ4 | Pins 22 & 23 | IRQ3 | Pins 11 & 12 |
| | | closed | | closed |
|---+--------+------------------+----------+-----------------|
| | IRQ3 | Pins 23 & 24 | IRQ4 | Pins 10 & 11 |
| | | closed | | closed |
|---+--------+------------------+----------+-----------------|
| | IRQ5 | Pins 20 & 21 | IRQ5 | Pins 8 & 9 |
| | | closed | | closed |
|---+--------+------------------+----------+-----------------|
| | IRQ7 | Pins 19 & 20 | IRQ7 | Pins 7 & 8 |
| | | closed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| LPT | J4 |
|-----------------------------+------------------------------|
| » | 1 | Pins 1 & 2 closed |
|----+------------------------+------------------------------|
| | 2 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J4 |
|----------------------------+-------------------------------|
| » | IRQ7 | Pins 4 & 5 closed |
|----+-----------------------+-------------------------------|
| | IRQ5 | Pins 5 & 6 closed |
+------------------------------------------------------------+