TTC COMPUTER PRODUCTS

MP-010

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

[Image]

                            CONNECTIONS

        Purpose          Location         Purpose          Location

  Serial port 1            J2       Serial port 2            J3

                    PRIMARY PORT I/O ADDRESS CONFIGURATION

    Address     SW1/1   SW1/2   SW1/3   SW1/4   SW1/5   SW1/6   SW1/7   SW1/8

  »    3F8h -    Off     Off     Off     Off    Off     Off     Off      On
       3FFh

       2F8h -    Off     Off     Off     Off    Off      On     Off      On
       2FFh

       3E8h -    Off     On      Off     Off    Off     Off     Off      On
       3EFh

       2E8h -    Off     On      Off     Off    Off      On     Off      On
       2EFh

       2F0h -    On      Off     Off     Off    Off      On     Off      On
       2FFh

       3E0h -    On      On      Off     Off    Off     Off     Off      On
       3E7h

       2EOh -    On      On      Off     Off    Off      On     Off      On
       2E7h

       26Oh -    On      On      Off     Off     On      On     Off      On
       267h

      Disabled   Off     Off     Off     Off    Off     Off     Off     Off

                 SECONDARY PORT I/O ADDRESS CONFIGURATION

  Address    SW2/1  SW2/2   SW2/3   SW2/4   SW2/5   SW2/6   SW2/7   SW2/8

   3F8h -    Off     Off     Off     Off     Off    Off     Off      On
   3FFh

   2F8h -    Off     Off     Off     Off     Off     On     Off      On
   2FFh

   3E8h -    Off     On      Off     Off     Off    Off     Off      On
   3EFh

   2E8h -    Off     On      Off     Off     Off     On     Off      On
   2EFh

   2F0h -     On     Off     Off     Off     Off     On     Off      On
   2FFh

   3E0h -     On     On      Off     Off     Off    Off     Off      On
   3E7h

   2EOh -     On     On      Off     Off     Off     On     Off      On
   2E7h

   26Oh -     On     On      Off     Off     On      On     Off      On
   267h

  Disabled   Off     Off     Off     Off     Off    Off     Off      Off

                       SERIAL PORT INTERRUPT SELECT

           IRQ                 Port 1 (JP3)             Port 2 (JP4)

          IRQ2              Pins 1 & 2 closed        Pins 1 & 2 closed

          IRQ3              Pins 3 & 4 closed        Pins 3 & 4 closed

          IRQ4              Pins 5 & 6 closed        Pins 5 & 6 closed

          IRQ5              Pins 7 & 8 closed        Pins 7 & 8 closed

          IRQ10             Pins 9 & 10 closed       Pins 9 & 10 closed

          IRQ11            Pins 11 & 12 closed      Pins 11 & 12 closed

          IRQ12            Pins 13 & 14 closed      Pins 13 & 14 closed

          IRQ15            Pins 15 & 16 closed      Pins 15 & 16 closed

        Disabled                   Open                     Open

  Note:The default interrupt setting for Port 1 is IRQ4, and for Port 2
  it is IRQ3.

                        RS-422/RS-485 CONFIGURATION

     Port                   Setting                         JP5

       1         RTS controls output if RTS is       Pins 1 & 2 closed
                              Low

       1            Transmit output enabled          Pins 3 & 4 closed

       1         DTR controls receive input if       Pins 5 & 6 closed
                          DTR is Low

       1             Receive input enabled           Pins 7 & 8 closed

       2         RTS controls output if RTS is      Pins 9 & 10 closed
                              Low

       2            Transmit output enabled         Pins 11 & 12 closed

       2         DTR controls receive input if      Pins 13 & 14 closed
                          DTR is Low

       2             Receive input enabled          Pins 15 & 16 closed

           PRIMARY PORT SINGLE/MULTIPLE SOURCE INTERRUPT SELECT

                Setting                                 JP1

  »             Single source                    Pins 2 & 3 closed

               Multiple source                   Pins 1 & 2 closed

            Note:Multiple source mode allows two or more ports to use the
            same IRQ setting, while Single source mode requires separate
            IRQ’s for each port.

          SECONDARY PORT SINGLE/MULTIPLE SOURCE INTERRUPT SELECT

                Setting                                 JP2

  »             Single source                    Pins 2 & 3 closed

               Multiple source                   Pins 1 & 2 closed

            Note:Multiple source mode allows two or more ports to use the
            same IRQ setting, while Single source mode requires separate
            IRQ’s for each port.

               TERMINATING RESISTOR CONFIGURATION

       Setting                 JP6                   JP7

  Resistors enabled          Closed                Closed

  Resistors disabled          Open                  Open