
IBM CORPORATION

PC SERVER 520 (TYPE 8641) MODEL MZO, MZV, MZS, MZL, MZE

Processor                  Pentium
Processor Speed            Unidentified
Chip Set                   Unidentified
Video Chip Set             Unidentified
Maximum Onboard Memory     256MB
Maximum Video Memory       Unidentified
Cache                      512KB
BIOS                       Unidentified
Dimensions                 355mm x 304mm
I/O Options                32-bit PCI slots (2), floppy drive interface,
                           IDE interfaces (2), SCSI interface, Wide SCSI
                           interfaces (2), parallel port, PS/2 mouse port,
                           serial ports (2), VGA port, cache slot
NPU Options                None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  SCSI interface LED        J2         Serial port 2              J21

  IDE interface             J3         Serial port 1              J24

  Chassis fan power         J4         Reset switch               J25

  Speaker                   J6         SCSI interface             J28

  CPU fan power             J8         Wide SCSI interface        J35
                                       (internal)

  CPU fan power             J9         Wide SCSI interface        J39
                                       (external)

  Power LED                 J10        VGA port                   J40

  IDE interface             J13        PS/2 mouse port            J42

  Parallel port             J19        32-bit PCI slots       PC1 -& PC2

  Floppy drive              J20        Cache slot                 SL1
  interface

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           J3A          Unidentified
      alter

     Factory configured - do not           J12              Open
      alter

     Factory configured - do not           J14          Unidentified
      alter

     Password write enabled                J15        Pins 2 & 3 closed

      Password write disabled               J15        Pins 1 & 2 closed

     Factory configured - do not           J16          Unidentified
      alter (C2 cover)

     Factory configured - do not           J17          Unidentified
      alter (C2 keylock)

     On board video enabled                J26        Pins 1 & 2 closed

      On board video disabled               J26        Pins 2 & 3 closed

     On board SCSI enabled                 J27        Pins 1 & 2 closed

      On board SCSI disabled                J27        Pins 2 & 3 closed

                           SIMM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2        Bank 3

     8MB        (2) 1M x 36       None           None          None

     16MB       (2) 2M x 36       None           None          None

     16MB       (2) 1M x 36   (2) 1M x 36        None          None

     24MB       (2) 2M x 36   (2) 1M x 36        None          None

     24MB       (2) 1M x 36   (2) 1M x 36    (2) 1M x 36       None

     32MB       (2) 4M x 36       None           None          None

     32MB       (2) 2M x 36   (2) 2M x 36        None          None

     32MB       (2) 1M x 36   (2) 1M x 36    (2) 1M x 36    (2) 1M x 36

     40MB       (2) 4M x 36   (2) 1M x 36        None          None

     48MB       (2) 4M x 36   (2) 2M x 36        None          None

     48MB       (2) 2M x 36   (2) 2M x 36    (2) 2M x 36       None

     64MB       (2) 4M x 36   (2) 2M x 36    (2) 2M x 36       None

     64MB       (2) 8M x 36       None           None          None

                       SIMM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2        Bank 3

     64MB       (2) 4M x 36   (2) 4M x 36        None          None

     64MB       (2) 2M x 36   (2) 2M x 36    (2) 2M x 36    (2) 2M x 36

     72MB       (2) 8M x 36   (2) 1M x 36        None          None

     80MB       (2) 8M x 36   (2) 1M x 36    (2) 1M x 36       None

     80MB       (2) 4M x 36   (2) 2M x 36    (2) 2M x 36    (2) 2M x 36

     80MB       (2) 8M x 36   (2) 2M x 36        None          None

     88MB       (2) 8M x 36   (2) 1M x 36    (2) 1M x 36    (2) 1M x 36

     96MB       (2) 8M x 36   (2) 2M x 36    (2) 2M x 36       None

     96MB       (2) 8M x 36   (2) 4M x 36        None          None

     96MB       (2) 4M x 36   (2) 4M x 36    (2) 4M x 36       None

    112MB       (2) 8M x 36   (2) 2M x 36    (2) 2M x 36    (2) 2M x 36

    128MB       (2) 8M x 36   (2) 4M x 36    (2) 4M x 36       None

    128MB       (2) 8M x 36   (2) 8M x 36        None          None

    128MB       (2) 4M x 36   (2) 4M x 36    (2) 4M x 36    (2) 4M x 36

    160MB       (2) 8M x 36   (2) 4M x 36    (2) 4M x 36    (2) 4M x 36

    192MB       (2) 8M x 36   (2) 8M x 36    (2) 8M x 36       None

    256MB       (2) 8M x 36   (2) 8M x 36    (2) 8M x 36    (2) 8M x 36

  Note: The locations of the banks are unidentified.

                CACHE CONFIGURATION

           Size                    Bank 0

          512KB            512KB module installed

                    VIDEO MEMORY CONFIGURATION

  Note: The size & location of the video memory is unidentified.

        CPU CLOCK SPEED SELECTION

        Speed                J43

        50MHz         Pins 2 & 3 closed

        60MHz         Pins 1 & 2 closed

