APPARAT, INC.

AT COMBO CARD

Card Type              Multi-I/O
Chipset                Unidentified
Maximum Onboard Memory 3MB DRAM
I/O Options            Parallel port, serial port
Data Bus               16-bit ISA

[Image]

                                CONNECTIONS

          Function             Label           Function             Label

  Serial port                  CN1     Parallel port                CN2

                        USER CONFIGURABLE SETTINGS

                 Setting                      Label         Position

  Serial port address set to COM1: (3F8h)      E1           Pins 2 & 3
                                                             closed

  Serial port address set to COM2: (2F8h)      E1           Pins 1 & 2
                                                             closed

  Parallel port address set to 378h            E3           Pins 2 & 3
                                                             closed

  Parallel port address set to 278h            E3           Pins 1 & 2
                                                             closed

  Serial port enabled                          E5            Closed

  Serial port disabled                         E5             Open

  Parallel port enabled                        E6            Closed

  Parallel port disabled                       E6             Open

            Note:Disabling a port does not disable its respective
            interrupt; this must be done with the interrupt setting
            jumpers.

                     STARTING MEMORY ADDRESS SELECTION

     Setting          System Board          SW1/1             SW1/2
                         Memory

      256KB              256KB               On                 On

      512KB              512KB               On                Off

      1024KB             640KB               Off                On

      1408KB              1MB                Off               Off

                            DRAM CONFIGURATION

  Starting     Bank 0    Bank 1    Bank 2    Bank 3     Bank 4    Bank 5

   Address
   Setting

    256KB       (18)      None      None      None       None      None
               256K x
                 1

    256KB       (18)      (18)      None      None       None      None
               256K x    256K x
                 1         1

    256KB       (18)      (18)       (18)     None       None      None
               256K x    256K x     256K x
                 1         1          1

    256KB       (18)      (18)       (18)      (18)      None      None
               256K x    256K x     256K x    256K x
                 1         1          1         1

    256KB       (18)      (18)       (18)      (18)      (18)      None
               256K x    256K x     256K x    256K x    256K x
                 1         1          1         1         1

    256KB       (18)      (18)       (18)      (18)      (18)      (18)
               256K x    256K x     256K x    256K x    256K x    256K x
                 1         1          1         1         1         1

    512KB       (18)      None      None      None       None      None
               64K x 1

    512KB       (18)      (18)      None      None       None      None
               64K x 1   256K x
                           1

    512KB       (18)      (18)       (18)     None       None      None
               64K x 1   256K x     256K x
                           1          1

    512KB       (18)      (18)       (18)      (18)      None      None
               64K x 1   256K x     256K x    256K x
                           1          1         1

    512KB       (18)      (18)       (18)      (18)      (18)      None
               64K x 1   256K x     256K x    256K x    256K x
                           1          1         1         1

    512KB       (18)      (18)       (18)      (18)      (18)      (18)
               64K x 1   256K x     256K x    256K x    256K x    256K x
                           1          1         1         1         1

   1024KB       (18)      (18)      None      None       None      None
               256K x    256K x
                 1         1

   1024KB       (18)      (18)       (18)     None       None      None
               256K x    256K x     256K x
                 1         1          1

   1024KB       (18)      (18)       (18)      (18)      None      None
               256K x    256K x     256K x    256K x
                 1         1          1         1

   1024KB       (18)      (18)       (18)      (18)      (18)      None
               256K x    256K x     256K x    256K x    256K x
                 1         1          1         1         1

   1024KB       (18)      (18)       (18)      (18)      (18)      (18)
               256K x    256K x     256K x    256K x    256K x    256K x
                 1         1          1         1         1         1

   1408KB       (18)      (18)      None      None       None      None
               256K x    256K x
                 1         1

   1408KB       (18)      (18)       (18)     None       None      None
               256K x    256K x     256K x
                 1         1          1

   1408KB       (18)      (18)       (18)      (18)      None      None
               256K x    256K x     256K x    256K x
                 1         1          1         1

   1408KB       (18)      (18)       (18)      (18)      (18)      None
               256K x    256K x     256K x    256K x    256K x
                 1         1          1         1         1

   1408KB       (18)      (18)       (18)      (18)      (18)      (18)
               256K x    256K x     256K x    256K x    256K x    256K x
                 1         1          1         1         1         1

            Note:Bank 0 may be used for either base (conventional) or
            extended memory, but not both. Therefore, when the starting
            address is set to either 256KB or 512KB, Bank 0 is used to
            raise the base memory to 640KB. Any remaining memory in Bank
            0 is ignored.

                         DRAM SWITCH CONFIGURATION

   Number       SW1/3     SW1/4     SW1/5     SW1/6     SW1/7      SW1/8

    Banks

  Installed

      1          On        Off       Off       Off       Off        Off

      2          On        On        Off       Off       Off        Off

      3          On        On        On        Off       Off        Off

      4          On        On        On         On       Off        Off

      5          On        On        On         On        On        Off

      6          On        On        On         On        On        On

            Note:SW1/3 to SW1/8 enable Banks 0 through 5 respectively.
            Banks 3, 4, and 5 are located on a daughterboard. The
            locations of the memory and daughterboard headers are
            unidentified.

     SERIAL PORT INTERRUPT SELECTION

       Setting                E2

        IRQ3          Pins 1 & 2 closed

        IRQ4          Pins 2 & 3 closed

      Disabled               Open

    PARALLEL PORT INTERRUPT SELECTION

       Setting                E4

        IRQ5          Pins 1 & 2 closed

        IRQ7          Pins 2 & 3 closed

      Disabled               Open

                            MISCELLANEOUS NOTES

  The banks on the AT Combo card must be completely populated before the
  daughterboard can be used.

  The daughterboard contains banks 3 through 5.