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                                          

<gopher://bitreich.org/I/th99/m/S-T/33372-1.png>
   

   +------------------------------------------------------------+
   |                        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.                                   |
   +------------------------------------------------------------+