COMTROL CORPORATION
===================

   HOSTESS 550 16

   Card Type          Multi-user serial controller                
   Chipset/Controller Texas Instruments (UART)                    
   I/O Options        Serial ports (16)                           
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/C-D/50249-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Purpose        | Location  |   Purpose    | Location |
   |----------------------+-----------+--------------+----------|
   | 100 Pin interface    |    CN1    | Daisy chain  |    J2    |
   | connector            |           | connector 2  |          |
   |----------------------+-----------+--------------+----------|
   | Daisy chain          |    J1     |              |          |
   | connector 1          |           |              |          |
   |------------------------------------------------------------|
   | Note: Daisy chain connectors are for the use of multiple   |
   | cards on the same interrupt.                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                RS-232/RS-422 MODE SELECTION                |
   |------------------------------------------------------------|
   |       Port       |       RS-232       |       RS-422       |
   |------------------+--------------------+--------------------|
   |    JP1-16/A-C    | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT INTERRUPT SELECTION               |
   |------------------------------------------------------------|
   |IRQ |SW2/1 |SW2/2 |SW2/3 |SW2/4 |SW2/5 |SW2/6 |SW2/7 |SW2/8 |
   |----+------+------+------+------+------+------+------+------|
   |2/9 | N/A  |  On  | Off  | Off  | Off  | Off  | Off  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 3  | N/A  | Off  |  On  | Off  | Off  | Off  | Off  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 4  | N/A  | Off  | Off  |  On  | Off  | Off  | Off  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 5  | N/A  | Off  | Off  | Off  |  On  | Off  | Off  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 10 | N/A  | Off  | Off  | Off  | Off  |  On  | Off  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 11 | N/A  | Off  | Off  | Off  | Off  | Off  |  On  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 12 | N/A  | Off  | Off  | Off  | Off  | Off  | Off  |  On  |
   |------------------------------------------------------------|
   |Note: These interrupts are for AT&T, DOS, INTERACTIVE       |
   |386/ix, SCO XENIX, and SCO UNIX operating systems.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MASK INTERRUPT CONFIGURATION                |
   |------------------------------------------------------------|
   |            Setting            |           SW2/1            |
   |-------------------------------+----------------------------|
   |            Enabled            |             On             |
   |-------------------------------+----------------------------|
   |           Disabled            |            Off             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   I/O ADDRESS SELECTION                    |
   |------------------------------------------------------------|
   |Address|SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6|SW1/7|SW1/8|
   |-------+------+------+------+------+------+-----+-----+-----|
   | 200h  |  On  |  On  | Off  |  On  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 280h  | Off  |  On  | Off  |  On  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 500h  |  On  | Off  |  On  | Off  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 580h  | Off  | Off  |  On  | Off  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 600h  |  On  |  On  | Off  | Off  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 680h  | Off  |  On  | Off  | Off  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 700h  |  On  | Off  | Off  | Off  |  On  | On  | On  | On  |
   |------------------------------------------------------------|
   |Note: These settings are used for SCO XENIX, SCO UNIX, AT&T |
   |UNIX, AND INTERACTIVE 386/ix operating systems.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MISCELLANEOUS TECHNICAL NOTE                |
   |------------------------------------------------------------|
   |     Serial ports are located on an interface box which     |
   |     connects to Hostess 550 via the 100-pin interface      |
   |                         connector.                         |
   +------------------------------------------------------------+