
SIEMENS NIXDORF INFORMATIONSSYSTEME AG

SYSTEM BOARD PCD-4LDX

Processor           80486SX/80487SX/80486DX/80486DX2
Processor Speed     25/33/50(internal)/66(internal)MHz
Chip Set            Unidentified
Video Chip Set      Unidentified
Maximum Onboard     32MB
Memory
Maximum Video       2MB
Memory
Cache               64/128/256KB
BIOS                Unidentified
Dimensions          330mm x 218mm
I/O Options         Ethernet 10Base5 connector, Ethernet 10BaseT
                    connector, floppy drive interface, IDE interface,
                    parallel port, PS/2 mouse port, serial ports (2), VGA
                    feature connector, VGA port, riser slot
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  VGA port                   CN1       Floppy drive               CN8
                                       interface

  Parallel port              CN2       IDE interface              CN9

  Serial port 2              CN3       VGA feature connector      CN10

  Serial port 1              CN4       External battery           CN11

  PS/2 mouse port            CN5       Speaker                    J13

  Ethernet 10Base5           CN6       Front panel connector      JP30
  connector

  Ethernet 10BaseT           CN7       Riser slot                 SL1
  connector

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  ?   Factory configured - do not          CN12          Unidentified
      alter

  ?   Factory configured - do not          CN13          Unidentified
      alter

  ?   Factory configured - do not          CN14          Unidentified
      alter

  ?   Internal speaker enabled              J13        Pins 1 & 2 closed

      Internal speaker disabled             J13              Open

      External speaker enabled              J13             Closed

  ?   Monitor type select color            JP10             Closed

      Monitor type select monochrome       JP10              Open

  ?   PS/2 mouse IRQ12 enabled             JP11             Closed

      PS/2 mouse IRQ12 disabled            JP11              Open

  ?   On board video enabled               JP25             Closed

      On board video disabled              JP25              Open

  ?   LAN interface enabled                JP31              Open

      LAN interface disabled               JP31             Closed

  ?   System booted from hard drive        JP32              Open

      System booted from network           JP32             Closed

  ?   LAN type select 10BaseT              JP37        Pins 1 & 2 closed

      LAN type select 10Base5              JP37        Pins 2 & 3 closed

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

     4MB        (4) 1M x 9      None

     8MB        (4) 1M x 9   (4) 1M x 9

     16MB       (4) 4M x 9      None

     20MB       (4) 1M x 9   (4) 4M x 9

     20MB       (4) 4M x 9   (4) 1M x 9

     32MB       (4) 4M x 9   (4) 4M x 9

                            CACHE CONFIGURATION

    Size       Bank 0     Bank 1     TAG (U48)    TAG (U49)    TAG (U50)

    64KB      (4) 8K x   (4) 8K x    (1) 8K x 8     None        (1) 16K x
                 8          8                                      4

   128KB       (4) 32K     None      (1) 8K x 8     None        (1) 16K x
                x 8                                                4

   256KB       (4) 32K    (4) 32K    (1) 8K x 8   (1) 8K x 8    (1) 16K x
                x 8        x 8                                     4

  Note: The location of banks 0 & 1 and the TAG are unidentified.

                     CACHE JUMPER CONFIGURATION

   Size     JP12      JP13     JP14      JP15      JP16      JP17

   None     2 & 3    2 & 3     Open      Open      Open      Open

   64KB     2 & 3    2 & 3     Open      Open      Open      Open

  128KB     1 & 2    1 & 2     Closed    Open      Open     Closed

  256KB     2 & 3    2 & 3     Closed    Closed   Closed    Closed

  Note: Pins designated should be in the closed position.

                  VIDEO MEMORY CONFIGURATION

        Size               Bank 0               Bank 1

        1MB                  1MB                 None

        2MB                  1MB                 1MB

  Note: The size of the video memory chips is unidentified.

     CPU SPEED SELECTION

  Speed      JP5       JP6

  25MHz     Closed     Open

  33MHz      Open     Closed

  50iMHz    Closed     Open

  66iMHz     Open     Closed

                            CPU TYPE SELECTION

       Type                JP1               JP2                JP3

      80486SX             Open            Pins 1 & 2           Open
                                            closed

      80486DX           Pins 1 & 2        Pins 2 & 3          Closed
                         closed             closed

     80486DX2           Pins 1 & 2        Pins 2 & 3          Closed
                         closed             closed

                         LAN DMA CHANNEL SELECTION

         Channel                   JP35                     JP36

             5             Pins 1 & 2 closed        Pins 1 & 2 closed

              6             Pins 3 & 4 closed        Pins 3 & 4 closed

                             LAN IRQ SELECTION

                  IRQ                                 JP34

                   None                               Open

                  IRQ5                         Pins 1 & 2 closed

                   IRQ9                         Pins 3 & 4 closed

                   IRQ10                        Pins 5 & 6 closed

                   IRQ11                        Pins 7 & 8 closed

                         LAN I/O ADDRESS SELECTION

               Setting                                JP33

                  300H                     Pins 1 & 2, 3 & 4 closed

                   320H                         Pins 3 & 4 closed

                   340H                         Pins 1 & 2 closed

                   360H                               Open

