MULTI-TECH SYSTEMS, INC.
========================

   ISI1508PC

   Card Type          Serial controller                           
   Chipset/Controller Unidentified                                
   I/O Options        Serial ports (8)                            
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/M-O/50332-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   | DB-78 connector               |            CN1             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              I/O ADDRESS SELECT (REVISION A)               |
   |------------------------------------------------------------|
   | Address  |SW1/1 |SW1/2 |SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|
   |----------+------+------+-----+-----+-----+-----+-----+-----|
   |>>  | 200h | Off  | Off  | Off | Off | Off | Off | Off | On  |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 100h | Off  | Off  | Off | Off | Off | Off | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 108h | Off  |  On  | Off | Off | Off | Off | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 110h | Off  | Off  | On  | Off | Off | Off | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 118h | Off  |  On  | On  | Off | Off | Off | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 120h | Off  | Off  | Off | On  | Off | Off | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3D8h | Off  |  On  | On  | Off | On  | On  | On  | On  |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3E0h |  On  |  On  | On  | Off | Off | Off | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3E8h | Off  |  On  | Off | On  | On  | On  | On  | On  |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3F0h | Off  | Off  | On  | On  | On  | On  | On  | On  |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3F8h | Off  |  On  | On  | On  | On  | On  | On  | On  |
   |------------------------------------------------------------|
   |  Note:A total of 96 address settings are available. The    |
   |  switches are a binary representation of the decimal       |
   |  addresses. Switch 1 is the Least Significant bit and      |
   |  switch 8 is the Most Significant bit. The switches have   |
   |  the following decimal values: switch 1=1, 2=2, 3=4, 4=8,  |
   |  5=16, 6=32, 7=64, 8=128. Turn Off the switches and add the|
   |  values of the Off switches to obtain the correct address. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              I/O ADDRESS SELECT (REVISION B)               |
   |------------------------------------------------------------|
   | Address  |SW1/1 |SW1/2 |SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|
   |----------+------+------+-----+-----+-----+-----+-----+-----|
   |>>  | 200h | Off  | Off  | Off | Off | Off | Off | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 100h | Off  | Off  | Off | Off | Off | On  | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 108h |  On  | Off  | Off | Off | Off | On  | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 110h | Off  |  On  | Off | Off | Off | On  | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 118h |  On  |  On  | Off | Off | Off | On  | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 120h | Off  | Off  | On  | Off | Off | On  | Off | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3D8h |  On  |  On  | Off | On  | On  | On  | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3E0h | Off  | Off  | On  | On  | On  | On  | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3E8h |  On  | Off  | On  | On  | On  | On  | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3F0h | Off  |  On  | On  | On  | On  | On  | On  | Off |
   |---+------+------+------+-----+-----+-----+-----+-----+-----|
   |   | 3F8h |  On  |  On  | On  | On  | On  | On  | On  | Off |
   |------------------------------------------------------------|
   |  Note:A total of 96 address settings are available. The    |
   |  switches are a binary representation of the decimal       |
   |  addresses. Switch 1 is the Least Significant bit and      |
   |  switch 8 is the Most Significant bit. The switches have   |
   |  the following decimal values: switch 1=1, 2=2, 3=4, 4=8,  |
   |  5=16, 6=32, 7=64, 8=128. Turn Off the switches and add the|
   |  values of the Off switches to obtain the correct address. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INTERRUPT SELECT                      |
   |------------------------------------------------------------|
   |  IRQ   |  J1/A  |  J1/B  |  J1/C  |  J1/D  | J1/E  | J1/F  |
   |--------+--------+--------+--------+--------+-------+-------|
   |>>| IRQ3 |  Open  | Closed |  Open  |  Open  | Open  | Open  |
   |-+------+--------+--------+--------+--------+-------+-------|
   | | IRQ2 | Closed |  Open  |  Open  |  Open  | Open  | Open  |
   |-+------+--------+--------+--------+--------+-------+-------|
   | | IRQ4 |  Open  |  Open  | Closed |  Open  | Open  | Open  |
   |-+------+--------+--------+--------+--------+-------+-------|
   | | IRQ5 |  Open  |  Open  |  Open  | Closed | Open  | Open  |
   |-+------+--------+--------+--------+--------+-------+-------|
   | | IRQ6 |  Open  |  Open  |  Open  |  Open  |Closed | Open  |
   |-+------+--------+--------+--------+--------+-------+-------|
   | | IRQ7 |  Open  |  Open  |  Open  |  Open  | Open  |Closed |
   +------------------------------------------------------------+