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# BOCA RESEARCH, INC.
IO 2 BY 4
Card Type Multi I/O card
Chipset/Controller 16C550
I/O Options Parallel ports (2), serial ports (4)
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| I/O connector 1 | CN1 | I/O connector 2 | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| Port | Status | J3/A | J3/B | J3/C | J3/D |
|--------+----------+----------+---------+---------+---------|
| 1 | Enabled | Closed | N/A | N/A | N/A |
|--------+----------+----------+---------+---------+---------|
| 1 | Disabled | Open | N/A | N/A | N/A |
|--------+----------+----------+---------+---------+---------|
| 2 | Enabled | N/A | Closed | N/A | N/A |
|--------+----------+----------+---------+---------+---------|
| 2 | Disabled | N/A | Open | N/A | N/A |
|--------+----------+----------+---------+---------+---------|
| 3 | Enabled | N/A | N/A | Closed | N/A |
|--------+----------+----------+---------+---------+---------|
| 3 | Disabled | N/A | N/A | Open | N/A |
|--------+----------+----------+---------+---------+---------|
| 4 | Enabled | N/A | N/A | N/A | Closed |
|--------+----------+----------+---------+---------+---------|
| 4 | Disabled | N/A | N/A | N/A | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRIMARY SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J4/Q | J4/R | J4/S | J4/T |
|-------------+-----------+-----------+-----------+----------|
| » | IRQ4 | Open | Closed | Open | Open |
|---+---------+-----------+-----------+-----------+----------|
| | IRQ2 | Open | Open | Open | Closed |
|---+---------+-----------+-----------+-----------+----------|
| | IRQ3 | Open | Open | Closed | Open |
|---+---------+-----------+-----------+-----------+----------|
| | IRQ5 | Closed | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECOND SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J4/M | J4/N | J4/O | J4/P |
|-------------+-----------+-----------+-----------+----------|
| » | IRQ3 | Open | Open | Closed | Open |
|---+---------+-----------+-----------+-----------+----------|
| | IRQ2 | Open | Open | Open | Closed |
|---+---------+-----------+-----------+-----------+----------|
| | IRQ4 | Open | Closed | Open | Open |
|---+---------+-----------+-----------+-----------+----------|
| | IRQ5 | Closed | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| THIRD SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J4/I | J4/J | J4/K | J4/L |
|----------+------------+------------+-----------+-----------|
| IRQ2 | Open | Open | Open | Closed |
|----------+------------+------------+-----------+-----------|
| IRQ3 | Open | Open | Closed | Open |
|----------+------------+------------+-----------+-----------|
| IRQ4 | Open | Closed | Open | Open |
|----------+------------+------------+-----------+-----------|
| IRQ5 | Closed | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FOURTH SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J4/E | J4/F | J4/G | J4/H |
|----------+------------+------------+-----------+-----------|
| IRQ2 | Open | Open | Open | Closed |
|----------+------------+------------+-----------+-----------|
| IRQ3 | Open | Open | Closed | Open |
|----------+------------+------------+-----------+-----------|
| IRQ4 | Open | Closed | Open | Open |
|----------+------------+------------+-----------+-----------|
| IRQ5 | Closed | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| Port 1 | J3/E | Port 2 | J3/F |
|-------------------+------------+--------------+------------|
| » | Enabled | Closed | Enabled | Closed |
|---+---------------+------------+--------------+------------|
| | Disabled | Open | Disabled | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| Port 1 | J4/C | J4/D | Port 2 | J4/A | J4/B |
|-----------+---------+---------+---------+---------+--------|
| » | IRQ7 | Closed | Open | IRQ5 | Open | Closed |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ5 | Open | Closed | IRQ7 | Closed | Open |
+------------------------------------------------------------+