DIAMOND FLOWER, INC.

MS-422

Card Type          Multi I/O card
Chipset/Controller UMC82450
I/O Options        Serial ports (2)
Maximum DRAM       N/A

[Image]

                                CONNECTIONS

       Purpose         Location             Purpose              Location

  Serial port 1          CN1      Protective/ground connector      JP9

  Serial port 2          CN2

                         SERIAL PORT CONFIGURATION

    Port 1 (CN1)        Port 2 (CN2)          SW1/1            SW1/2

  »       COM1              COM2               Off              Off

          COM1            Disabled              On              Off

          COM2              COM3               Off               On

          COM3              COM4                On               On

                       SERIAL PORT INTERRUPT SELECT

   Port 1 (CN1)       Port 2      SW1/3      SW1/4     SW1/5      SW1/6
                      (CN2)

  »      IRQ4         IRQ3          On        Off       Off         On

         IRQ3         IRQ4         Off        On         On        Off

       Disabled     Disabled       Off        Off       Off        Off

                           RS-422 DRIVER SELECT

    Port 1 (CN1)        Port 2 (CN2)          JP1               JP2

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

     Always on           Always on            Open             Open

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

                             RS-422/232 SELECT

   Port 1 (CN1)      Port 2 (CN2)          JP4                 JP3

      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

                           PORT DIAGNOSTIC MODE

      Port 1 (CN1)         Port 2 (CN2)          JP7             JP8

  »   Normal operation    Normal operation    Pins 1 & 2      Pins 1 & 2
                                                closed         closed

       IBM diagnostic      IBM diagnostic     Pins 2 & 3      Pins 2 & 3
            test               test             closed         closed