UNIDENTIFIED

MIOXT-320

Card Type                 Multi I/O
Chipset Controller        Unidentified
I/O Options               Floppy drive interface, game port, parallel port,
                          serial ports (2), clock (location unidentified)
Maximum Dram              N/A

[Image]

                                CONNECTIONS

     Purpose           Location           Purpose            Location

  Game port               J1          Serial port 2             J4

  Parallel port           J2          Floppy drive              J5
                                      interface

  Serial port 1           J3

                    SERIAL PORT SELECTION

         J3                   J4                  JP1

       Port 1               Port 2         Pins 2 & 3 closed

       Port 2               Port 1         Pins 1 & 2 closed

                      SERIAL PORT CONFIGURATION

   Port 1     Port 2      SW1/1       SW1/2       SW1/3      SW1/4

    COM1       COM2         On         Off         On         Off

    COM1       COM4         On         Off         Off        On

    COM1      Disabled      On         Off         Off        Off

    COM3       COM2        Off         On          On         Off

    COM3       COM4        Off         On          Off        On

    COM3      Disabled     Off         On          Off        Off

  Disabled     COM2        Off         Off         On         Off

  Disabled     COM4        Off         Off         Off        On

  Disabled    Disabled     Off         Off         Off        Off

             SERIAL PORT INTERRUPT SELECTION

  Port 1    Port 2    SW2/1     SW2/2     SW2/3    SW2/4

   IRQ3      IRQ4      Off       On        On       Off

   IRQ4      IRQ3      On        Off       Off      On

                PARALLEL PORT CONFIGURATION

     Port         Address         SW1/5          SW1/6

    Enabled     278h (LPT1)         On            Off

    Enabled     378h (LPT2)        Off            On

   Disabled         N/A            Off            Off

  PARALLEL PORT INTERRUPT SELECTION

     IRQ        SW2/5        SW2/6

    IRQ5         Off          On

    IRQ7          On          Off

  GAME PORT CONFIGURATION

     Port         SW1/7

   Enabled          On

   Disabled        Off

                    CLOCK CONFIGURATION

   Clock        IRQ        SW1/8      SW2/7       SW2/8

  Enabled      IRQ2         On          On         Off

  Enabled      IRQ5         On         Off          On

  Disabled      N/A         Off        N/A         N/A

                       SECOND SERIAL PORT ACTIVATION

  To activate the second serial port, the following chips must be
  installed:

                 Chip                                Socket

          SN75188 or MC1488P                           U5

          SN75189 or MC1489P                           U6

               IC 8250                                U11