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# MULTITECH SYSTEMS, INC.
ISI508U
Card Type Serial card
Chipset Controller N/A
I/O Options Serial ports (8 on external panel)
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location |
|-------------------------------+----------------------------|
| 78-pin serial port connector | CN1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O BASE ADDRESS SELECTION |
|------------------------------------------------------------|
|Address |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5|SW1/6|SW1/7|SW1/8|
|--------+------+------+------+------+-----+-----+-----+-----|
|» |380h | On | On | On | On | Off | Off | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |100h | On | On | On | On | On | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |108h | Off | On | On | On | On | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |110h | On | Off | On | On | On | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |118h | Off | Off | On | On | On | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |120h | On | On | Off | On | On | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3D8h | Off | Off | On | Off | Off | Off | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3E0h | On | On | Off | Off | Off | Off | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3E8h | Off | On | Off | Off | Off | Off | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F0h | On | Off | Off | Off | Off | Off | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F8h | Off | Off | Off | Off | Off | Off | Off | On |
|------------------------------------------------------------|
| Note:A total of 96 base address settings are available. |
| The switches are a binary representation of the decimal |
| memory addresses. Switch SW1/8 is the Most Significant Bit|
| and switch SW1/1 is the Least Significant Bit. The |
| switches have the following decimal values: switch |
| SW1/1=8, SW1/2=16, SW1/3=32, SW1/4=64, SW1/5=128, |
| SW1/6=256, SW1/7=512, SW1/8=1024. Turn off the switches |
| and add the values of the switches that are off to obtain |
| the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | J1/A | J1/B | J1/C | J1/D | J1/E | J1/F |
|-------+--------+--------+--------+--------+--------+-------|
|»| 3 | Open | Closed | Open | Open | Open | Open |
|-+-----+--------+--------+--------+--------+--------+-------|
| | 2/9 | Closed | Open | Open | Open | Open | Open |
|-+-----+--------+--------+--------+--------+--------+-------|
| | 4 | Open | Open | Closed | Open | Open | Open |
|-+-----+--------+--------+--------+--------+--------+-------|
| | 5 | Open | Open | Open | Closed | Open | Open |
|-+-----+--------+--------+--------+--------+--------+-------|
| | 6 | Open | Open | Open | Open | Closed | Open |
|-+-----+--------+--------+--------+--------+--------+-------|
| | 7 | Open | Open | Open | Open | Open |Closed |
+------------------------------------------------------------+