SIEMENS NIXDORF INFORMATIONSSYSTEME AG

S26361-D824

Processor           80486SX/80486SX2/80486DX/80486DX2
Processor Speed     25/33/50(internal)/66(internal)MHz
Chip Set            Unidentified
Video Chip Set      Unidentified
Maximum Onboard     32MB
Memory
Maximum Video       1MB
Memory
Cache               None
BIOS                Unidentified
Dimensions          254mm x 218mm
I/O Options         Floppy drive interface, IDE interface, parallel port,
                    PS/2 mouse port, serial ports (2), video pass through
                    connector, VGA port, riser slot
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Video pass through         CN1       IDE interface              CN7
  connector

  PS/2 mouse port            CN2       Floppy drive               CN8
                                       interface

  Serial port 1              CN3       Front panel                CN9
                                       connector

  Serial port 2              CN4       Speaker                   CN10

  Parallel port              CN5       Riser slot                 SL1

  VGA port                   CN6       Reset switch               X31

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      On board video enabled                  X60           Pins 1 & 2
                                                              closed

      On board video disabled                 X60           Pins 2 & 3
                                                              closed

  »   VGA IRQ9 disabled                       X161          Pins 1 & 2
                                                              closed

      VGA IRQ9 enabled                        X161          Pins 2 & 3
                                                              closed

  »   PS/2 mouse IRQ12 enabled                X162          Pins 1 & 2
                                                              closed

      PS/2 mouse IRQ12 disabled               X162          Pins 2 & 3
                                                              closed

  »   Monitor type select color               X165          Pins 1 & 2
                                                              closed

      Monitor type select monochrome          X165          Pins 2 & 3
                                                              closed

  »   CMOS memory normal operation            X166          Pins 1 & 2
                                                              closed

      CMOS memory clear                       X166          Pins 2 & 3
                                                              closed

      Floppy drive write protect              X192          Pins 1 & 2
      disabled                                                closed

      Floppy drive write protect              X192          Pins 2 & 3
      enabled                                                 closed

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

      4MB        (1) 1M x 36      None

      8MB        (1) 2M x 36      None

      8MB        (1) 1M x 36   (1) 1M x 36

     12MB        (1) 2M x 36   (1) 1M x 36

     16MB        (1) 2M x 36   (1) 2M x 36

     16MB        (1) 4M x 36      None

     24MB        (1) 4M x 36   (1) 2M x 36

     32MB        (1) 4M x 36   (1) 4M x 36

     32MB        (1) 8M x 36      None

           VIDEO MEMORY CONFIGURATION

      Size          Bank 0          Bank 1

     512KB           512KB           None

      1MB            512KB           512KB

  Note: The size of the chip is unidentified.

           CPU SPEED SELECTION

        Speed                X41

        25MHz         Pins 1 & 2 closed

        33MHz         Pins 2 & 3 closed

       50iMHz         Pins 1 & 2 closed

       66iMHz         Pins 2 & 3 closed

            CPU TYPE SELECTION

        Type                 X33

       80486SX        Pins 1 & 2 closed

      80486SX2        Pins 2 & 3 closed

       80486DX        Pins 2 & 3 closed

      80486DX2        Pins 2 & 3 closed

                            CPU TYPE SELECTION

                  Type                                  X32

  »             Write through                    Pins 1 & 2 closed

                 Write back                      Pins 2 & 3 closed

                       MISCELLANEOUS TECHNICAL NOTE

            Note: The location of pin 1 on the connectors are
            unidentified. Jumpers that are not labeled may be factory
            configured.