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

   HOSTESS S

   Card Type          I/O controller                              
   Chipset/Controller Texas Instruments (UART)                    
   I/O Options        Serial ports (2)                            
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/C-D/50283-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Purpose        | Location |   Purpose    | Location |
   |-----------------------+----------+--------------+----------|
   | Optional second DB25  |   CN1    | 9-pin serial |   DB9    |
   | connector             |          | connector    |          |
   |-----------------------+----------+--------------+----------|
   | 25-pin serial         |   DB25   |              |          |
   | connector             |          |              |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    I/O ADDRESS SELECT                      |
   |------------------------------------------------------------|
   |    Address    |    SW1/1     |    SW1/2     |    SW1/3     |
   |---------------+--------------+--------------+--------------|
   |   200h-207h   |      On      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |   280h-287h   |      On      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |   2COh-287h   |      On      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |   300h-307h   |      On      |     Off      |     Off      |
   |---------------+--------------+--------------+--------------|
   |   Reserved    |     Off      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |   Reserved    |     Off      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |   Reserved    |     Off      |     Off      |      On      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT INTERRUPT SELECT                 |
   |------------------------------------------------------------|
   |   IRQ    |  SW2/4  |  SW2/5  |  SW2/6  |  SW2/7  |  SW2/8  |
   |----------+---------+---------+---------+---------+---------|
   |   IRQ2   |   Off   |   Off   |   Off   |   Off   |   On    |
   |----------+---------+---------+---------+---------+---------|
   |   IRQ3   |   Off   |   Off   |   Off   |   On    |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |   IRQ5   |   Off   |   Off   |   On    |   Off   |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |  IRQ10   |   Off   |   On    |   Off   |   Off   |   Off   |
   |----------+---------+---------+---------+---------+---------|
   |  IRQ11   |   On    |   Off   |   Off   |   Off   |   Off   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              LINE TO LINE TERMINATION SELECT               |
   |------------------------------------------------------------|
   |    Jumper    |    Setting    |           Meaning           |
   |--------------+---------------+-----------------------------|
   |     JP1      |    Closed     |  Receive clock for port 1   |
   |--------------+---------------+-----------------------------|
   |     JP2      |    Closed     |  Receive signal for port 1  |
   |--------------+---------------+-----------------------------|
   |     JP3      |    Closed     |  Transmit clock for port 1  |
   |--------------+---------------+-----------------------------|
   |     JP4      |    Closed     |  Receive signal for port 2  |
   |------------------------------------------------------------|
   | Note:The default position for the jumpers is open.         |
   +------------------------------------------------------------+