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       # COMTROL CORPORATION
       
          HOSTESS 4/8, HOSTESS 550 4/8
       
          Card Type       Serial                                         
          Chipset         16450 (Hostess 4/8) or 16550 (Hostess 550 4/8) 
          I/O Options     Serial ports (8)                               
          Data Bus        16-bit ISA                                     
          Card Size       Full height, half length                       
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        | Label |     Function      | Label |
          |------------------------+-------+-------------------+-------|
          | Serial ports via       |  J1   | Header for 4-port |  J3   |
          | 100-pin connector      |       | daughterboard     |       |
          |------------------------+-------+-------------------+-------|
          | Header for 4-port      |  J2   |                   |       |
          | daughterboard          |       |                   |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Setting               | Label |   Position   |
          |-------------------------------------+-------+--------------|
          | » | Card does not have 4-port       |  JP1  |  Pins 2 & 3  |
          |   | daughterboard installed         |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | Card has 4-port daughterboard   |  JP1  |  Pins 1 & 2  |
          |   | installed                       |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | Interrupt mask enabled          | SW2/1 |      On      |
          |---+---------------------------------+-------+--------------|
          |   | Interrupt mask disabled         | SW2/1 |     Off      |
          |---+---------------------------------+-------+--------------|
          | » | Factory configured - do not     | SW2/8 | Unidentified |
          |   | alter                           |       |              |
          |------------------------------------------------------------|
          |      Note:SW2/8 must be off if the daughterboard is        |
          |      installed.                                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               COMTROL MODE ADDRESS SELECTION               |
          |------------------------------------------------------------|
          |Setting |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5|SW1/6|SW1/7|SW1/8|
          |--------+------+------+------+------+-----+-----+-----+-----|
          | |0000h |  On  |  On  |  On  |  On  | On  | On  | On  | On  |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |0020h | Off  |  On  |  On  |  On  | On  | On  | On  | On  |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |0040h |  On  | Off  |  On  |  On  | On  | On  | On  | On  |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |0060h | Off  | Off  |  On  |  On  | On  | On  | On  | On  |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |0080h |  On  |  On  | Off  |  On  | On  | On  | On  | On  |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          |»|0280h |  On  |  On  | Off  |  On  | Off | On  | On  | On  |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |1F60h | Off  | Off  |  On  | Off  | Off | Off | Off | Off |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |1F80h |  On  |  On  | Off  | Off  | Off | Off | Off | Off |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |1FA0h | Off  |  On  | Off  | Off  | Off | Off | Off | Off |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |1FC0h |  On  | Off  | Off  | Off  | Off | Off | Off | Off |
          |-+------+------+------+------+------+-----+-----+-----+-----|
          | |1FE0h | Off  | Off  | Off  | Off  | Off | Off | Off | Off |
          |------------------------------------------------------------|
          |     Note: A total of 512 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 SW1/1 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, SW1/1=32.   |
          |     Turn off the switches and add the values of the        |
          |     switches that are off to obtain the correct memory     |
          |     address. (Off=1, On=0)                                 |
          |                                                            |
          |     SW1/1 must be off if the daughterboard is installed.   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INTERRUPT SELECTION                     |
          |------------------------------------------------------------|
          | Setting |  JP2   |SW2/2 |SW2/3 |SW2/4 |SW2/5 |SW2/6 |SW2/7 |
          |---------+--------+------+------+------+------+------+------|
          |    2    |Pins 1 &|  On  | Off  | Off  | Off  | Off  | Off  |
          |         |   2    |      |      |      |      |      |      |
          |---------+--------+------+------+------+------+------+------|
          |    3    |Pins 1 &| Off  |  On  | Off  | Off  | Off  | Off  |
          |         |   2    |      |      |      |      |      |      |
          |---------+--------+------+------+------+------+------+------|
          |    4    |Pins 1 &| Off  | Off  |  On  | Off  | Off  | Off  |
          |         |   2    |      |      |      |      |      |      |
          |---------+--------+------+------+------+------+------+------|
          |    5    |Pins 1 &| Off  | Off  | Off  |  On  | Off  | Off  |
          |         |   2    |      |      |      |      |      |      |
          |---------+--------+------+------+------+------+------+------|
          |    7    |Pins 2 &| Off  | Off  | Off  | Off  | Off  | Off  |
          |         |   3    |      |      |      |      |      |      |
          |---------+--------+------+------+------+------+------+------|
          |   10    |Pins 1 &| Off  | Off  | Off  | Off  |  On  | Off  |
          |         |   2    |      |      |      |      |      |      |
          |---------+--------+------+------+------+------+------+------|
          |   11    |Pins 1 &| Off  | Off  | Off  | Off  | Off  |  On  |
          |         |   2    |      |      |      |      |      |      |
          |------------------------------------------------------------|
          |     Note:Pins designated are in the closed position.       |
          |                                                            |
          |     IRQ7 is only available on boards that have SW2 marked  |
          |     with INTERRUPT.                                        |
          +------------------------------------------------------------+