COMTROL CORPORATION

HOSTESS I 8/HOSTESS I 16

Category               Serial controller
Chipset Controller     NEC
I /O Options Supported Serial ports (16)
Maximum Onboard Memory 512KB

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                                CONNECTIONS

       Purpose           Location           Purpose           Location

    100-pin serial          CN1           8-port module          CN4
       interface                           connector
      connector

    8-port upgrade          CN2           8-port module          CN5
    card connector                         connector

    8-port upgrade          CN3
    card connector

                      RS-232/RS-422 SELECT - JP1-JP8

     Setting         Jumper A      Jumper B      Jumper C      Jumper D

  »     RS-232      Pins 1 & 2    Pins 1 & 2     Pins 1 & 2    Pins 1 & 2
                      closed        closed        closed        closed

        RS-422      Pins 2 & 3    Pins 2 & 3     Pins 2 & 3    Pins 2 & 3
                      closed        closed        closed        closed

  Note: JP1-JP8 correspond to serial ports 1 - 8, respectively.

            PORT 1 FULL/HALF DUPLEX SELECT

          Setting                     FD1

     Half-duplex mode          Pins 1 & 2 closed

  Full-duplex mode (DMA1)      Pins 2 & 3 closed

            PORT 2 FULL/HALF DUPLEX SELECT

          Setting                     FD2

     Half-duplex mode          Pins 1 & 2 closed

  Full-duplex mode (DMA2)      Pins 2 & 3 closed

  PORTS 1 & 2 RS-232 SYNCHRONOUS/ASYNCHRONOUS SELECT - JP9

      Setting         Jumper A - Jumper E   Jumper F - Jumper M

    Asynchronous      Pins 1 & 2 closed      Pins 1 & 2 closed

    Synchronous       Pins 2 & 3 closed      Pins 1 & 2 closed

                 PORT 1 DATA TERMINAL READY (DTR) OPTIONS

            Setting                     JP14                  JP15

  »        Normal RS-232               Closed                 Open

         Synchronous RS-232             Open                 Closed

                 PORT 2 DATA TERMINAL READY (DTR) OPTIONS

            Setting                     JP16                  JP17

  »        Normal RS-232               Closed                 Open

         Synchronous RS-232             Open                 Closed

                                I/O ADDRESS

       Setting              SW1/1             SW1/2            SW1/3

  »        218h              Off               Off              Off

           21Ch               On               Off              Off

           238h              Off                On              Off

           23Ch               On                On              Off

           318h              Off               Off               On

           31Ch               On               Off               On

           338h              Off                On               On

           33Ch               On                On               On

               PORTS 9 - 15 RS-232/RS-422 SELECT - JP18-JP25

     Setting         Jumper A      Jumper B      Jumper C      Jumper D

  »     RS-232      Pins 1 & 2    Pins 1 & 2     Pins 1 & 2    Pins 1 & 2
                      closed        closed        closed        closed

        RS-422      Pins 2 & 3    Pins 2 & 3     Pins 2 & 3    Pins 2 & 3
                      closed        closed        closed        closed

  Note: JP18-JP25 correspond to serial ports 9 - 15, respectively.

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                                          DRAM CONFIGURATION

                     Memory Size                                          Bank 0

  »                       128KB                                         (2) 64K x 9

                          512KB                                        (2) 128M x 9