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# Multi-tech systems, inc.
isi551pc
Card Type Serial interface
Chip Set Unidentified
Maximum Onboard Memory Unidentified
I/O Options Serial port
Data Bus 16-bit ISA (EISA also available)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location |
|-------------------------------+----------------------------|
| Serial port 1 | J1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| | Label | Location |
|-------------------------------------+---------+------------|
| » | Factory configured do not alter | SW1/8 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT 1 ADDRESS SELECTION |
|------------------------------------------------------------|
| IRQ | JP1/ | JP1/ | JP1/ | JP1/ | JP1/ |
| | | | | | |
| | Pins 1 & | Pins 3 & | Pins 5 & | Pins 7 & | Pins 9 & |
| | 2 | 4 | 6 | 8 | 10 |
|-----+----------+----------+----------+----------+----------|
| 2 | Closed | Open | Open | Open | Open |
|-----+----------+----------+----------+----------+----------|
| 3 | Open | Closed | Open | Open | Open |
|-----+----------+----------+----------+----------+----------|
| 4 | Open | Open | Closed | Open | Open |
|-----+----------+----------+----------+----------+----------|
| 5 | Open | Open | Open | Closed | Open |
|-----+----------+----------+----------+----------+----------|
| 7 | Open | Open | Open | Open | Closed |
|-----+----------+----------+----------+----------+----------|
| 10 | Open | Open | Open | Open | Open |
|-----+----------+----------+----------+----------+----------|
| 11 | Open | Open | Open | Open | Open |
|-----+----------+----------+----------+----------+----------|
| 12 | Open | Open | Open | Open | Open |
|-----+----------+----------+----------+----------+----------|
| 15 | Open | Open | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PORT 1 ADDRESS SELECTION (CONTINUED) |
|------------------------------------------------------------|
| IRQ | JP1/ | JP1/ | JP1/ | JP1/ |
| | | | | |
| | Pins 11 & | Pins 13 & | Pins 15 & | Pins 17 & |
| | 12 | 14 | 16 | 18 |
|-----+-------------+-------------+-------------+------------|
| 2 | Open | Open | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 3 | Open | Open | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 4 | Open | Open | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 5 | Open | Open | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 7 | Open | Open | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 10 | Closed | Open | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 11 | Open | Closed | Open | Open |
|-----+-------------+-------------+-------------+------------|
| 12 | Open | Open | Closed | Open |
|-----+-------------+-------------+-------------+------------|
| 15 | Open | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS SELECT |
|------------------------------------------------------------|
| Setting |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |
|-----------+------+------+------+------+------+------+------|
| | 100h | On | On | On | On | On | Off | On |
|---+-------+------+------+------+------+------+------+------|
| | 108h | Off | On | On | On | On | Off | On |
|---+-------+------+------+------+------+------+------+------|
| | 110h | On | Off | On | On | On | Off | On |
|---+-------+------+------+------+------+------+------+------|
| | 118h | Off | Off | On | On | On | Off | On |
|---+-------+------+------+------+------+------+------+------|
| | 120h | On | On | Off | On | On | Off | On |
|---+-------+------+------+------+------+------+------+------|
| | 2E8h | Off | On | Off | Off | Off | On | Off |
| | (COM | | | | | | | |
| | 4:) | | | | | | | |
|---+-------+------+------+------+------+------+------+------|
|» | 2F8h | Off | Off | Off | Off | Off | On | Off |
| | (COM | | | | | | | |
| | 2:) | | | | | | | |
|---+-------+------+------+------+------+------+------+------|
| | 3D8h | Off | Off | On | Off | Off | Off | Off |
|---+-------+------+------+------+------+------+------+------|
| | 3E0h | On | On | Off | Off | Off | Off | Off |
|---+-------+------+------+------+------+------+------+------|
| | 3E8h | Off | On | Off | Off | Off | Off | Off |
| | (COM | | | | | | | |
| | 3:) | | | | | | | |
|---+-------+------+------+------+------+------+------+------|
| | 3F0h | On | Off | Off | Off | Off | Off | Off |
|---+-------+------+------+------+------+------+------+------|
| | 3F8h | Off | Off | Off | Off | Off | Off | Off |
| | (COM | | | | | | | |
| | 1:) | | | | | | | |
|------------------------------------------------------------|
| Note: |
| |
|A total of 752 memory base address settings are available. |
|The switches are a binary representation of the decimal |
|addresses. Switch 1 is the Least Significant Bit and switch |
|7 is the Most Significant Bit. The switches have the |
|following decimal values: switch 1=8, 2=16, 3=32, 4=64, |
|5=128, 6=256, 7=512. Add the values of the on switches to |
|obtain the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Orientation of SW1 may vary in different revisions. |
+------------------------------------------------------------+