COMTROL CORPORATION

HOSTESS

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

[Image]

                                CONNECTIONS

       Purpose           Location           Purpose           Location

  100 Pin interface         CN1        External reset            CN4
  connector                            connector 1

  Upgrade connector         CN2        External reset            CN5
  1                                    connector 2

  Upgrade connector         CN3
  2

                           I/O ADDRESS SELECTION

  Address     SW1/1    SW1/2    SW1/3    SW1/4    SW1/5    SW1/6    SW1/7

    100h       On       On       On       On       Off      On       On

    140h       On       On       On       On       Off      On      Off

    200h       On       On       On       Off      On       On       On

    240h       On       On       On       Off      On       On      Off

    280h       On       On       On       Off      On       Off      On

    500h       On       On       Off      On       Off      On       On

    540h       On       On       Off      On       Off      On      Off

    580h       On       On       Off      On       Off      Off      On

    600h       On       On       Off      Off      On       On       On

    640h       On       On       Off      Off      On       On      Off

    680h       On       On       Off      Off      On       Off      On

    700h       On       On       Off      Off      Off      On       On

  Note: Switch SW1/1 in on for the four port controller and Off for the
  eight port model.

                         FOUR/EIGHT PORT SELECTION

  Number of Ports          JP1              SW1/1             SW2/1

         4              Pins 2 & 3            On                On
                         closed

         8              Pins 1 & 2           Off               Off
                         closed

             SERIAL PORT INTERRUPT SELECTION (MASK ENABLE ON)

  IRQ     SW2/1     SW2/2    SW2/3     SW2/4     SW2/5    SW2/6     SW2/7

  2/9       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

              SERIAL PORT INTERRUPT SELECT (MASK ENABLE OFF)

  IRQ     SW2/1     SW2/2    SW2/3     SW2/4     SW2/5    SW2/6     SW2/7

  2/9      Off       On       Off       Off       Off      Off      Off

   3       Off       Off       On       Off       Off      Off      Off

   4       Off       Off      Off        On       Off      Off      Off

   5       Off       Off      Off       Off       On       Off      Off

   10      Off       Off      Off       Off       Off       On      Off

   11      Off       Off      Off       Off       Off      Off       On

                       MISCELLANEOUS TECHNICAL NOTE

   Serial ports are located on an interface box which connects to Hostess
                   via the 100-pin interface connector.