SEALEVEL SYSTEMS, INC.
======================

   DUOCOM

   Card Type               Serial card                            
   Chip Set                Unidentified                           
   Maximum Onboard Memory  Unidentified                           
   I/O Options             Serial ports (2 RS-232)                
   Hard Drives supported   None                                   
   Floppy drives supported None                                   
   Data Bus                8-bit ISA                              
   Card Size               Half-length, full-height               

<gopher://bitreich.org/I/th99/i/S-T/54511-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | Serial Port 1        |  J1   | Serial Port 2       |  J2   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   |    Port 1    |  Port 2  | SW1/1  | SW1/2  | SW1/3  | SW1/4 |
   |--------------+----------+--------+--------+--------+-------|
   |>> | 3F8h     | 2F8h     |   On   |   On   |   On   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 3E8h     | 2E8h     |   On   |   On   |  Off   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 2F8h     | 2E8h     |   On   |   On   |  Off   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 2F8h     | 3E8h     |   On   |  Off   |   On   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 3220h    | 3228h    |   On   |  Off   |   On   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 4220h    | 4228h    |   On   |  Off   |  Off   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 5220h    | 5228h    |   On   |  Off   |  Off   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 5220h    | 4220h    |  Off   |   On   |   On   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 280h     | 290h     |  Off   |   On   |   On   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 300h     | 308h     |  Off   |   On   |  Off   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 310h     | 318h     |  Off   |   On   |  Off   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 280h     | 288h     |  Off   |  Off   |   On   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 290h     | 298h     |  Off   |  Off   |   On   |  Off  |
   |---+----------+----------+--------+--------+--------+-------|
   |   | 300h     | 280h     |  Off   |  Off   |  Off   |  On   |
   |---+----------+----------+--------+--------+--------+-------|
   |   | Disabled | Disabled |  Off   |  Off   |  Off   |  Off  |
   +------------------------------------------------------------+

+-------------------------------------------------------------------------+
|                    SERIAL PORT 1 INTERRUPT SELECTION                    |
|-------------------------------------------------------------------------|
|   IRQ    | E1/A | E1/B | E1/C | E1/D | E1/E | E1/F | E1/G | E1/H | E1/I |
|----------+------+------+------+------+------+------+------+------+------|
| |IR/FONT>|Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ3    | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
|>>|IRQ4    | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ5    | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ7    | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ10   | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ11   | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ12   | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ15   | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
+-------------------------------------------------------------------------+

+-------------------------------------------------------------------------+
|                    SERIAL PORT 2 INTERRUPT SELECTION                    |
|-------------------------------------------------------------------------|
|   IRQ    | E2/A | E2/B | E2/C | E2/D | E2/E | E2/F | E2/G | E2/H | E2/I |
|----------+------+------+------+------+------+------+------+------+------|
| |IR/FONT>|Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
|>>|IRQ3    | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ4    | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ5    | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ7    | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ10   | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ11   | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ12   | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+--------+------+------+------+------+------+------+------+------+------|
| |IRQ15   | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
+-------------------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL INTERRUPT MODE SELECTION               |
   |------------------------------------------------------------|
   |                  IRQ                   |        E3         |
   |----------------------------------------+-------------------|
   |>> | Normal                             | Pins 1 & 3, 2 & 4 |
   |   |                                    |      closed       |
   |---+------------------------------------+-------------------|
   |   | Shared Interrupt mode              | Pins 3 & 5, 6 & 8 |
   |   |                                    |      closed       |
   |---+------------------------------------+-------------------|
   |   | Shared Interrupt mode when  using  | Pins 3 & 5, 4 & 6 |
   |   | more than one DUOCOM               |      closed       |
   |---+------------------------------------+-------------------|
   |   | None                               |       Open        |
   +------------------------------------------------------------+