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# COMTROL CORPORATION
HOSTESS S
Card Type I/O controller
Chipset/Controller Texas Instruments (UART)
I/O Options Serial ports (2)
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| Optional second DB25 | CN1 | 9-pin serial | DB9 |
| connector | | connector | |
|-----------------------+----------+--------------+----------|
| 25-pin serial | DB25 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O ADDRESS SELECT |
|------------------------------------------------------------|
| Address | SW1/1 | SW1/2 | SW1/3 |
|---------------+--------------+--------------+--------------|
| 200h-207h | On | On | On |
|---------------+--------------+--------------+--------------|
| 280h-287h | On | On | Off |
|---------------+--------------+--------------+--------------|
| 2COh-287h | On | Off | On |
|---------------+--------------+--------------+--------------|
| 300h-307h | On | Off | Off |
|---------------+--------------+--------------+--------------|
| Reserved | Off | On | On |
|---------------+--------------+--------------+--------------|
| Reserved | Off | On | Off |
|---------------+--------------+--------------+--------------|
| Reserved | Off | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | SW2/4 | SW2/5 | SW2/6 | SW2/7 | SW2/8 |
|----------+---------+---------+---------+---------+---------|
| IRQ2 | Off | Off | Off | Off | On |
|----------+---------+---------+---------+---------+---------|
| IRQ3 | Off | Off | Off | On | Off |
|----------+---------+---------+---------+---------+---------|
| IRQ5 | Off | Off | On | Off | Off |
|----------+---------+---------+---------+---------+---------|
| IRQ10 | Off | On | Off | Off | Off |
|----------+---------+---------+---------+---------+---------|
| IRQ11 | On | Off | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE TO LINE TERMINATION SELECT |
|------------------------------------------------------------|
| Jumper | Setting | Meaning |
|--------------+---------------+-----------------------------|
| JP1 | Closed | Receive clock for port 1 |
|--------------+---------------+-----------------------------|
| JP2 | Closed | Receive signal for port 1 |
|--------------+---------------+-----------------------------|
| JP3 | Closed | Transmit clock for port 1 |
|--------------+---------------+-----------------------------|
| JP4 | Closed | Receive signal for port 2 |
|------------------------------------------------------------|
| Note:The default position for the jumpers is open. |
+------------------------------------------------------------+