DIAMOND FLOWER, INC.

MS-422 PLUS

Card Type          Multi I/O
Chipset/Controller NS16550AN
I/O Options        Serial ports (2)
Maximum DRAM       N/A

[Image]

                            CONNECTIONS

     Purpose         Location         Purpose         Location

  Serial port 1         J2         Serial port 2         J1

                         SERIAL PORT CONFIGURATION

     Port 1(J2)          Port 2 (J1)          SW2/1            SW2/2

  »       COM1              COM2               Off              Off

          COM1            Disabled              On              Off

          COM2              COM3               Off               On

          COM3              COM4                On               On

                       SERIAL PORT INTERRUPT SELECT

    Port 1(J2)        Port 2      SW2/3      SW2/4     SW2/5      SW2/6
                      (J1)

  »      IRQ4         IRQ3          On        Off       Off         On

         IRQ3         IRQ4         Off        On         On        Off

       Disabled     Disabled       Off        Off       Off        Off

                                        DMA SELECT

  Port 1 (J1)   Port 2 (J2)  SW1/1   SW1/2   SW1/3   SW1/4   SW1/5   SW1/6   SW1/7   SW1/8

   Receiver      Receiver     On      On      Off     Off     On      On     Off     Off

  Transmitter   Transmitter   Off     Off     On      On     Off     Off      On      On

                    DMA PORT AND CHANNEL CONFIGURATION

   Port 1 (J1)       Port 2 (J2)      JP1       JP2      JP11      JP12

      DMA 1             DMA 3        Closed    Closed    Open      Open

      DMA 3              N/A          Open     Closed    Closed   Closed

      DMA 1              N/A         Closed     Open     Open      Open

       N/A              DMA 1        Closed     Open     Closed   Closed

       N/A              DMA 3         Open     Closed    Open      Open

                      RS-422/RS-232 INTERFACE SELECT

     Port 1 (J1)        Port 2 (J2)        JP8/A-J            JP9/A-J

  »       RS-422           RS-422         Pins 1 & 2         Pins 1 & 2
                                            closed            closed

          RS-422           RS-232         Pins 1 & 2         Pins 2 & 3
                                            closed            closed

          RS-232           RS-422         Pins 2 & 3         Pins 1 & 2
                                            closed            closed

          RS-232           RS-232         Pins 2 & 3         Pins 2 & 3
                                            closed            closed

                           RS-422 DRIVER SELECT

      Port 1 (J1)          Port 2 (J2)          JP5              JP3

  »      Always on          Always on           Open            Open

         Always Off         Always Off       Pins 2 & 3       Pins 2 & 3
                                               closed          closed

        Controlled by      Controlled by     Pins 1 & 2       Pins 1 & 2
            RTS                RTS             closed          closed

                      RS-232/RS-422 NORMAL SET SELECT

     Port 1 (J1)        Port 2 (J2)           JP6               JP4

  »       RS-422          RS--422        Pins 2 & 3, 4    Pins 2 & 3, 4 &
                                          & 5 closed         5 closed

          RS-422           RS-232        Pins 2 & 3, 4    Pins 1 & 2, 5 &
                                          & 5 closed         6 closed

          RS-232           RS-422        Pins 1 & 2, 5    Pins 2 & 3, 4 &
                                          & 6 closed         5 closed

          RS-232           RS-232        Pins 1 & 2, 5    Pins 1 & 2, 5 &
                                          & 6 closed         6 closed

                            CLOCK SPEED SELECT

                  Speed                                 JP7

  »               1.8432MHz                      Pins 1 & 2 closed

                   8.00MHz                       Pins 2 & 3 closed

                        SIGNAL GROUND CONFIGURATION

                 Setting                                JP10

  »               Connected                            Closed

                   Isolated                             Open