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

   HOSTESS 550

   Card Type          Multi-user serial controller                
   Chipset/Controller Texas Instruments (UART)                    
   I/O Options        Serial ports (4 or 8)                       
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/C-D/50270-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Purpose        | Location  |   Purpose    | Location |
   |----------------------+-----------+--------------+----------|
   | 100-pin interface    |    CN1    | Upgrade      |    J2    |
   | connector            |           | connector 1  |          |
   |----------------------+-----------+--------------+----------|
   | Daisy chain          |    CN2    | Upgrade      |    J3    |
   | connector 1          |           | connector 2  |          |
   |----------------------+-----------+--------------+----------|
   | Daisy chain          |    CN3    |              |          |
   | connector 2          |           |              |          |
   |------------------------------------------------------------|
   | Note: Daisy chain connectors are for the use of multiple   |
   | cards on the same interrupt.                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   I/O ADDRESS SELECTION                    |
   |------------------------------------------------------------|
   | Address | SW1/2 | SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8 |
   |---------+-------+-------+------+------+------+------+------|
   |  140h   |  Off  |  On   | Off  |  On  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  200h   |  On   |  On   |  On  | Off  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  240h   |  Off  |  On   |  On  | Off  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  280h   |  On   |  Off  |  On  | Off  |  On  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  500h   |  On   |  On   | Off  |  On  | Off  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  540h   |  Off  |  On   | Off  |  On  | Off  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  580h   |  On   |  Off  | Off  |  On  | Off  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  640h   |  Off  |  On   |  On  | Off  | Off  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  680h   |  On   |  Off  |  On  | Off  | Off  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  6C0h   |  Off  |  Off  |  On  | Off  | Off  |  On  |  On  |
   |---------+-------+-------+------+------+------+------+------|
   |  700h   |  On   |  On   | Off  | Off  | Off  |  On  |  On  |
   |------------------------------------------------------------|
   |  Note: These settings are for use with SCO XENIX, SCO UNIX,|
   |  AT&T UNIX, INTERACTIVE 386/ix, and Microport V/386        |
   |  operating systems.                                        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   I/O ADDRESS SELECTION                    |
   |------------------------------------------------------------|
   |Address|Controller|SW1/2|SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|
   |-------+----------+-----+-----+-----+-----+-----+-----+-----|
   | 280h  |  First   | On  | Off | On  | Off | On  | On  | On  |
   |-------+----------+-----+-----+-----+-----+-----+-----+-----|
   | 240h  |  Second  | Off | On  | On  | Off | On  | On  | On  |
   |------------------------------------------------------------|
   |     Note:These settings are for use with the SunOS         |
   |     operating system with a maximum of two Hostess 550     |
   |     controllers in a system..                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT INTERRUPT SELECTION               |
   |------------------------------------------------------------|
   | IRQ | SW2/1 | SW2/2 | SW2/3 | SW2/4 | SW2/5 | SW2/6 |SW2/7 |
   |-----+-------+-------+-------+-------+-------+-------+------|
   |  2  |  On   |  On   |  Off  |  Off  |  Off  |  Off  | Off  |
   |-----+-------+-------+-------+-------+-------+-------+------|
   |  3  |  On   |  Off  |  On   |  Off  |  Off  |  Off  | Off  |
   |-----+-------+-------+-------+-------+-------+-------+------|
   |  4  |  On   |  Off  |  Off  |  On   |  Off  |  Off  | Off  |
   |-----+-------+-------+-------+-------+-------+-------+------|
   |  5  |  On   |  Off  |  Off  |  Off  |  On   |  Off  | Off  |
   |-----+-------+-------+-------+-------+-------+-------+------|
   | 10  |  On   |  Off  |  Off  |  Off  |  Off  |  On   | Off  |
   |-----+-------+-------+-------+-------+-------+-------+------|
   | 11  |  On   |  Off  |  Off  |  Off  |  Off  |  Off  |  On  |
   |------------------------------------------------------------|
   |  Note: These settings are for use with SCO XENIX, SCO UNIX,|
   |  AT&T UNIX, INTERACTIVE 386/ix, DOS, and Microport V/386   |
   |  operating systems.                                        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   I/O ADDRESS SELECTION                    |
   |------------------------------------------------------------|
   |Address|Controller|SW1/2|SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|
   |-------+----------+-----+-----+-----+-----+-----+-----+-----|
   | 280h  |  First   | On  | Off | On  | Off | Off | Off | Off |
   |-------+----------+-----+-----+-----+-----+-----+-----+-----|
   | 240h  |  Second  | On  | Off | Off | On  | Off | Off | Off |
   |------------------------------------------------------------|
   |Note: These settings are for use with the SunOS operating   |
   |system.                                                     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MISCELLANEOUS TECHNICAL NOTE                |
   |------------------------------------------------------------|
   |  Switch 1/1 is Off for an eight port controller, on for a  |
   | four port. Switch 2/8 is on for a four port controller and |
   |   Off for an eight port. Serial ports are located on an    |
   |    interface box which connects to Hostess 186 via the     |
   |                100-pin interface connector.                |
   +------------------------------------------------------------+