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

   HOSTESS 550 RJ11

   Card Type         Serial                                       
   Chipset           16554                                        
   I/O Options       Serial ports (4)                             
   Data Bus          16-bit ISA                                   
   Card Size         Full height, three-quarters length           

<gopher://bitreich.org/I/th99/i/C-D/53250-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | Serial port 1        |  J1   | Serial port 5       |  J5   |
   |----------------------+-------+---------------------+-------|
   | Serial port 2        |  J2   | Serial port 6       |  J6   |
   |----------------------+-------+---------------------+-------|
   | Serial port 3        |  J3   | Serial port 7       |  J7   |
   |----------------------+-------+---------------------+-------|
   | Serial port 4        |  J4   | Serial port 8       |  J8   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                 | Label | Position  |
   |----------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | SW1/1 |    Off    |
   |---+------------------------------------+-------+-----------|
   |   | Interrupt mask enabled             | SW2/1 |    On     |
   |---+------------------------------------+-------+-----------|
   |   | Interrupt mask disabled            | SW2/1 |    Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   | Setting  | SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8 |
   |----------+-------+------+------+------+------+------+------|
   |  | 0000h |  On   |  On  |  On  |  On  |  On  |  On  |  On  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 0040h |  Off  |  On  |  On  |  On  |  On  |  On  |  On  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 0080h |  On   | Off  |  On  |  On  |  On  |  On  |  On  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 00C0h |  Off  | Off  |  On  |  On  |  On  |  On  |  On  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 0100h |  On   |  On  | Off  |  On  |  On  |  On  |  On  |
   |--+-------+-------+------+------+------+------+------+------|
   |>> | 0280h |  On   | Off  |  On  | Off  |  On  |  On  |  On  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 1EC0h |  Off  | Off  |  On  | Off  | Off  | Off  | Off  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 1F00h |  On   |  On  | Off  | Off  | Off  | Off  | Off  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 1F40h |  Off  |  On  | Off  | Off  | Off  | Off  | Off  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 1F80h |  On   | Off  | Off  | Off  | Off  | Off  | Off  |
   |--+-------+-------+------+------+------+------+------+------|
   |  | 1FC0h |  Off  | Off  | Off  | Off  | Off  | Off  | Off  |
   |------------------------------------------------------------|
   |     Note: A total of 256 base address settings are         |
   |     available. The switches are a binary representation of |
   |     the decimal memory addresses. SW1/8 is the Most        |
   |     Significant Bit and switch SW1/2 is the Least          |
   |     Significant Bit. The switches have the following       |
   |     decimal values: SW1/8=4096, SW1/7=2048, SW1/6=1024,    |
   |     SW1/5=512, SW1/4=256, SW1/3=128, SW1/2=64. Turn off the|
   |     switches and add the values of the switches that are   |
   |     off to obtain the correct memory address. (Off=1, On=0)|
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   |Setting | SW2/2 | SW2/3 | SW2/4 |SW2/5 |SW2/6 |SW2/7 |SW2/8 |
   |--------+-------+-------+-------+------+------+------+------|
   |   2    |  On   |  Off  |  Off  | Off  | Off  | Off  | Off  |
   |--------+-------+-------+-------+------+------+------+------|
   |   3    |  Off  |  On   |  Off  | Off  | Off  | Off  | Off  |
   |--------+-------+-------+-------+------+------+------+------|
   |   4    |  Off  |  Off  |  On   | Off  | Off  | Off  | Off  |
   |--------+-------+-------+-------+------+------+------+------|
   |   5    |  Off  |  Off  |  Off  |  On  | Off  | Off  | Off  |
   |--------+-------+-------+-------+------+------+------+------|
   |   7    |  Off  |  Off  |  Off  | Off  |  On  | Off  | Off  |
   |--------+-------+-------+-------+------+------+------+------|
   |   10   |  Off  |  Off  |  Off  | Off  | Off  |  On  | Off  |
   |--------+-------+-------+-------+------+------+------+------|
   |   11   |  Off  |  Off  |  Off  | Off  | Off  | Off  |  On  |
   +------------------------------------------------------------+