TTC COMPUTER PRODUCTS

MP-009

Card Type          Serial card
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 SELECT

    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

       2E0h -    On      On      Off     Off    Off      On     Off      On
       2E7h

       260h -    On      On      Off     Off     On      On     Off      On
       267h

      Disabled   Off     Off     Off     Off    Off     Off     Off     Off

                      SECONDARY PORT I/O ADDRESS SELECT

    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

       2E0h -    On      On      Off     Off    Off      On     Off      On
       2E7h

       260h -    On      On      Off     Off     On      On     Off      On
       267h

      Disabled   Off     Off     Off     Off    Off     Off     Off     Off

                       SERIAL PORT INTERRUPT SELECT

           IRQ                 JP3 (Port 1)             JP4 (Port 2)

          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.

           PRIMARY PORT SINGLE/MULTIPLE SOURCE INTERRUPT SELECT

                Setting                                 JP1

  »                Single                        Pins 2 & 3 closed

                  Multiple                       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                        Pins 2 & 3 closed

                  Multiple                       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.