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# MULTI-TECH SYSTEMS, INC.
ISI502Q
Card Type Serial controller
Chipset/Controller 16450/16550A
I/O Options Serial ports (2)
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN1 | Serial port 2 | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRIMARY PORT I/O ADDRESS SELECT |
|------------------------------------------------------------|
|Address |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5|SW1/6|SW1/7|SW1/8|
|--------+------+------+------+------+-----+-----+-----+-----|
|» |2F8h | Off | On | On | On | On | Off | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F8h | Off | On | On | On | On | On | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3E8h | Off | Off | On | On | On | On | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |2E8h | Off | Off | On | On | On | Off | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECONDARY PORT I/O ADDRESS SELECT |
|------------------------------------------------------------|
|Address |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5|SW1/6|SW1/7|SW1/8|
|--------+------+------+------+------+-----+-----+-----+-----|
|» |2F0h | Off | On | On | On | On | Off | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F0h | Off | On | On | On | On | On | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3E0h | Off | Off | On | On | On | On | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |2E0h | Off | Off | On | On | On | Off | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRIMARY SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J2/A | J2/B | J2/C | J2/D | J2/E |
|-----------+---------+---------+---------+---------+--------|
| » | IRQ4 | Open | Open | Closed | Open | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ3 | Open | Closed | Open | Open | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ2 | Closed | Open | Open | Open | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ5 | Open | Open | Open | Closed | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ7 | Open | Open | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECONDARY SERIAL PORT INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ | J1/A | J1/B | J1/C | J1/D | J1/E |
|-----------+---------+---------+---------+---------+--------|
| » | IRQ5 | Open | Open | Open | Closed | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ3 | Open | Closed | Open | Open | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ4 | Open | Open | Closed | Open | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ2 | Closed | Open | Open | Open | Open |
|---+-------+---------+---------+---------+---------+--------|
| | IRQ7 | Open | Open | Open | Open | Closed |
+------------------------------------------------------------+