SIIG, INC.
==========

   I/O EXPANDER 2S

   Card Type          Serial card                                 
   Chipset Controller 16550                                       
   I/O Options        Serial ports (2)                            
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/S-T/51001-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Purpose      | Location |     Purpose      | Location |
   |-------------------+----------+------------------+----------|
   | 25-pin serial     |   SE1    | 9-pin serial     |   SE2    |
   | port              |          | port             |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 1 CONFIGURATION                 |
   |------------------------------------------------------------|
   |         COM          |  S2/A   |  S2/B   |  S2/C  |  S2/D  |
   |----------------------+---------+---------+--------+--------|
   |>> | COM1 (3F8h-3FFh) |  Open   |  Open   |  Open  | Closed |
   |---+------------------+---------+---------+--------+--------|
   |   | COM2 (2F8h-2FFh) |  Open   |  Open   | Closed |  Open  |
   |---+------------------+---------+---------+--------+--------|
   |   | COM3 (3E8h-3EFh) |  Open   | Closed  |  Open  |  Open  |
   |---+------------------+---------+---------+--------+--------|
   |   | COM4 (2E8h-2EFh) | Closed  |  Open   |  Open  |  Open  |
   |---+------------------+---------+---------+--------+--------|
   |   |     Disabled     |  Open   |  Open   |  Open  |  Open  |
   +------------------------------------------------------------+

+-------------------------------------------------------------------------+
|                    SERIAL PORT 1 INTERRUPT SELECTION                    |
|-------------------------------------------------------------------------|
|   IRQ    |JP3/A |JP3/B |JP3/C |JP3/D |JP3/E |JP3/F |JP3/G |JP3/H |JP3/I |
|----------+------+------+------+------+------+------+------+------+------|
|>>|   4    | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |  2/9   | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   3    |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   5    | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   7    | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   10   | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   11   | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   12   | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   15   | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
|-+--------+------+------+------+------+------+------+------+------+------|
| |Disabled| Open | Open | Open | Open | Open | Open | Open | Open | Open |
+-------------------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 2 CONFIGURATION                 |
   |------------------------------------------------------------|
   |         COM          |  S1/A   |  S1/B   |  S1/C  |  S1/D  |
   |----------------------+---------+---------+--------+--------|
   |>> | COM2 (2F8h-2FFh) |  Open   |  Open   | Closed |  Open  |
   |---+------------------+---------+---------+--------+--------|
   |   | COM1 (3F8h-3FFh) |  Open   |  Open   |  Open  | Closed |
   |---+------------------+---------+---------+--------+--------|
   |   | COM3 (3E8h-3EFh) |  Open   | Closed  |  Open  |  Open  |
   |---+------------------+---------+---------+--------+--------|
   |   | COM4 (2E8h-2EFh) | Closed  |  Open   |  Open  |  Open  |
   |---+------------------+---------+---------+--------+--------|
   |   |     Disabled     |  Open   |  Open   |  Open  |  Open  |
   +------------------------------------------------------------+

+-------------------------------------------------------------------------+
|                    SERIAL PORT 2 INTERRUPT SELECTION                    |
|-------------------------------------------------------------------------|
|   IRQ    |JP1/A |JP1/B |JP1/C |JP1/D |JP1/E |JP1/F |JP1/G |JP1/H |JP1/I |
|----------+------+------+------+------+------+------+------+------+------|
|>>|   3    |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |  2/9   | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   4    | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   5    | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   7    | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   10   | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   11   | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   12   | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |   15   | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
|-+--------+------+------+------+------+------+------+------+------+------|
| |Disabled| Open | Open | Open | Open | Open | Open | Open | Open | Open |
+-------------------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  SERIAL PORT 2 ACTIVATION                  |
   |------------------------------------------------------------|
   |           Chip            |             Socket             |
   |---------------------------+--------------------------------|
   |           16550           |               U7               |
   |---------------------------+--------------------------------|
   |           1489            |               U9               |
   |---------------------------+--------------------------------|
   |           1488            |              U12               |
   |------------------------------------------------------------|
   | Note: To activate serial port 2 upgrade chips must be      |
   | installed.                                                 |
   +------------------------------------------------------------+