
IBM CORPORATION

PC SERVER 520 (TYPE 8641) MODEL EZO, EZV, EZL, EZS, EZE

Processor                  Pentium
Processor Speed            90/100MHz
Chip Set                   Unidentified
Video Chip Set             None
Maximum Onboard Memory     256MB
Maximum Video Memory       None
Cache                      256/512KB
BIOS                       Unidentified
Dimensions                 355mm x 304mm
I/O Options                32-bit PCI slots (3), floppy drive interface,
                           IDE interface, parallel port, PS/2 mouse port,
                           serial ports (2)
NPU Options                None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port             J6       Speaker                    W12

  Parallel port               J9       Power LED & keylock        W18

  Floppy drive interface     J10       IDE interface LED          W24

  Serial port 1              J11       CPU fan power              W35

  Serial port 2              J12       CPU fan power              W36

  IDE interface              J13       32-bit PCI slots         PC1  PC3

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Cache type select write back          W1               Open

      Cache type select write               W1              Closed
      through

     Factory configured - do not           W2               Open
      alter

     Factory configured - do not           W10        Pins 2 & 3 closed
      alter

     Factory configured - do not           W11          Unidentified
      alter

     Factory configured - do not           W13          Unidentified
      alter

     Factory configured - do not           W14          Unidentified
      alter

     Factory configured - do not           W15          Unidentified
      alter

     Factory configured - do not           W16        Pins 1 & 2 closed
      alter

     Factory configured - do not           W17             Closed
      alter

     Monitor type select color             W20             Closed

      Monitor type select monochrome        W20              Open

     Keyboard type select PS/2             W21             Closed

      Keyboard type select AT               W21              Open

     Factory configured - do not           W22              Open
      alter

     Factory configured - do not           W23              Open
      alter

     IDE IRQ select IRQ14                  W25        Pins 1 & 2 closed

      IDE IRQ select IRQ15                  W25        Pins 2 & 3 closed

     Factory configured - do not           W30              Open
      alter

     Factory configured - do not           W32          Unidentified
      alter

     Factory configured - do not           W33          Unidentified
      alter

     Factory configured - do not           W34          Unidentified
      alter

     Factory configured - do not           W37          Unidentified
      alter

     Factory configured - do not           W88          Unidentified
      alter

     Factory configured - do not           WU           Unidentified
      alter

                           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

     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

            CACHE CONFIGURATION

     Size          Bank 0        Bank 1

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

     512KB       (4) 64K x 8   (4) 64K x 8

        CACHE JUMPER CONFIGURATION

        Size                  W5

        256KB         Pins 1 & 2 closed

        512KB         Pins 2 & 3 closed

           CPU SPEED SELECTION

        Speed                 W6

        90MHz         Pins 1 & 2 closed

       100MHz         Pins 2 & 3 closed

