
ARNET CORPORATION

TWINPORT

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

[Image]

                            CONNECTIONS

        Purpose          Location         Purpose          Location

  Serial port 2            CN1      Serial port 1            CN2

                         SERIAL PORT CONFIGURATION

    Port 1 (CN2)         Port 2 (CN1)            S1              S2

        COM1                 COM2           1, 2, 3, 5, &     1 & 2 On
                                                6 on

        COM1               Disabled         1, 2, 3, & 5        1 On
                                                 on

      Disabled               COM2           1, 2, 3, & 6        2 On
                                                 on

      Disabled             Disabled           All Off            N/A

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                            I/O ADDRESS SELECT

   Port 1    Port 2     Option    S1/1    S1/2     S1/3    S1/7     S1/8
   (CN2)     (CN1)

   100h       108h       140h      Off     Off     Off     Off      Off

   180h       188h       1C0h      Off     Off      On     Off      Off

   200h       208h       240h      Off     On      Off     Off      Off

   200h       208h       2D0h      Off     On       On     Off      Off

   280h       288h       2C0h      On      Off     Off     Off      Off

   280h       288h       300h      On      Off      On     Off      Off

   300h       308h       340h      On      On      Off     Off      Off

   3F8h       2F8h       340h      On      On       On     Off      Off

  OPTION I/O SPACE CONFIGURATION

     Setting            S1/4

     Enabled             On

    Disabled            Off

                            I/O ADDRESS SELECT

  Port 1    Port 2    S1/1    S1/2    S1/3   S1/4    S1/5   S1/6    S1/7
  (CN2)     (CN1)

   IRQ4      IRQ3      On     On      Off    Off     Off    Off      Off

   IRQ2      IRQ2     Off     Off     On     Off     Off    Off      Off

   IRQ3      IRQ3     Off     Off     Off     On     Off    Off      Off

   IRQ4      IRQ4     Off     Off     Off    Off     On     Off      Off

   IRQ5      IRQ5     Off     Off     Off    Off     Off     On      Off

   IRQ7      IRQ7     Off     Off     Off    Off     Off    Off      On

                   FORMULA IV OPERATING SYSTEM SETTINGS

   UART Address       Option I/O         IRQ          S1           S2
                       Address

       280h              N/A            IRQ2        1, 5 & 6      3 on
                                                      on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                 MBOS/5, BOS/LAN OPERATING SYSTEM SETTINGS

   UART Address        Option I/O        IRQ          S1           S2
                        Address

        100h             N/A            IRQ2      5 & 6 on       3 on

         200h             N/A            IRQ2       2, 5 & 6      3 on
                                                      on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                     MUC-DOS OPERATING SYSTEM SETTINGS

   UART Address        Option I/O        IRQ          S1           S2
                        Address

        100h            140h            IRQ7       4, 5 & 6      7 on
                                                      on

         200h            240h            IRQ7      2, 4, 5 &      7 on
                                                     6 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                MUMPS/CCSM MUMPS OPERATING SYSTEM SETTINGS

   UART Address        Option I/O        IRQ          S1           S2
                        Address

        280h            2C0h            IRQ3      1, 4, 5 &      4 on
                                                     6 on

         200h            2D0h            IRQ3       2, 3, 4,      4 on
                                                   5 & 6 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                      PICK OPERATING SYSTEM SETTINGS

   UART Address       Option I/O        IRQ           S1           S2
                       Address

       280h             2C0h            IRQ4        1, 4, 5       5 on
                                                   and 6 on

       180h             1C0h            IRQ3        3, 4, 5       4 on
                                                   and 6 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                       QNX OPERATING SYSTEM SETTINGS

   UART Address       Option I/O         IRQ          S1           S2
                       Address

       280h              N/A            IRQ2        1, 5 & 6      3 on
                                                      on

       280h              N/A            IRQ3        1, 5 & 6      4 on
                                                      on

       280h              N/A            IRQ4        1, 5 & 6      5 on
                                                      on

       280h              N/A            IRQ5        1, 5 & 6      6 on
                                                      on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                      THEOS OPERATING SYSTEM SETTINGS

  UART Address     Option I/O      IRQ       System       S1        S2
                    Address                   Type

      280h            2C0h         IRQ5        AT       1, 4, 5    6 on
                                                        & 6 on

      280h            2C0h         IRQ4        XT       1, 4, 5    5 on
                                                        & 6 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                    VENIX/86 OPERATING SYSTEM SETTINGS

   UART Address       Option I/O         IRQ          S1           S2
                       Address

       280h              N/A            IRQ3        1, 5 & 6      4 on
                                                      on

       280h              N/A            IRQ4        1, 5 & 6      5 on
                                                      on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                 XENIX SYSTEM V OPERATING SYSTEM SETTINGS

  UART Address       Option I/O      IRQ      Port       S1         S2
                      Address

        100h          140h         IRQ4      COM1     4, 5, &     5 on
                                                        6 on

         280h          2C0h         IRQ4      COM1      1, 4,      5 on
                                                        5, & 6
                                                         on

        180h          1C0h         IRQ3      COM2      3, 4,      4 on
                                                        5, & 6
                                                         on

         300h          340h         IRQ3      COM2      1, 2,      4 on
                                                       4, 5, &
                                                        6 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                     XMM-DOS OPERATING SYSTEM SETTINGS

   UART Address        Option I/O        IRQ          S1           S2
                        Address

        100h            140h            IRQ2      4, 5, & 6      3 on
                                                      on

         180h            1C0h            IRQ7       3, 4, 5,      7 on
                                                    & 6 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

                   PC-MOS/386 OPERATING SYSTEM SETTINGS

   UART Address        Option I/O        IRQ          S1           S2
                        Address

        280h             N/A            IRQ2       1, 5 & 6      3 on
                                                      on

         100h             N/A            IRQ2      5 & 6 on       3 on

            Note:All switch keys other than those designated as on for a
            particular configuration should be put in the Off position.

