
M TECHNOLOGY, INC.

R525 PENTIUM PCI

Processor           Pentium
Processor Speed     75/90/100/120/133/150MHz
Chip Set            Intel
Max. Onboard DRAM   128MB
Cache               256/512KB
BIOS                Award
Dimensions          330mm x 218mm
I/O Options         32-bit PCI slots (4), floppy drive interface, green PC
                    connector, IDE interfaces (2), parallel port, PS/2
                    mouse port, serial ports (2), VRM connector, cache
                    slot
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port            CN1       Speaker                     J2

  Serial port 1              CN2       Turbo switch                J3

  Serial port 2              CN3       Turbo LED                   J4

  Parallel port              CN4       Reset switch                J5

  Floppy drive interface     CN5       Green PC connector          J6

  IDE interface 1            CN6       IDE interface LED          JP35

  IDE interface 2            CN7       32-bit PCI slots         PC1 - PC4

  VRM connector              CN8       Cache slot                 SL1

  Power LED & keylock         J1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             JP8              N/A
      alter

     Factory configured - do not             JP9              N/A
      alter

     Factory configured - do not             JP10             N/A
      alter

     Factory configured - do not             JP11             N/A
      alter

      Pipeline disabled                       JP42             Open

      Pipeline enabled                        JP42            Closed

     Cache type select write back            JP43             Open

      Cache type select write through         JP43            Closed

     Factory configured - do not             JP48             N/A
      alter

     Factory configured - do not             JP49             N/A
      alter

     CMOS memory normal operation            JP54             Open

      CMOS memory clear                       JP54            Closed

  Note: The location of the factory configured jumpers are unidentified.

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       8MB         (2) 1M x 36          NONE

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB         (2) 1M x 36     (2) 256K x 36

      10MB        (2) 256K x 36     (2) 1M x 36

      12MB         (2) 1M x 36     (2) 512K x 36

      12MB        (2) 512K x 36     (2) 1M x 36

      16MB         (2) 2M x 36          NONE

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

      18MB         (2) 2M x 36     (2) 256K x 36

      18MB        (2) 256K x 36     (2) 2M x 36

      20MB         (2) 2M x 36     (2) 512K x 36

      20MB        (2) 512K x 36     (2) 2M x 36

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

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

      32MB         (2) 4M x 36          NONE

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

      34MB         (2) 4M x 36     (2) 256K x 36

      34MB        (2) 256K x 36     (2) 4M x 36

      36MB         (2) 4M x 36     (2) 512K x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 4M x 36      (2) 1M x 36

      40MB         (2) 1M x 36      (2) 4M x 36

      48MB         (2) 4M x 36      (2) 2M x 36

      48MB         (2) 2M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          NONE

      64MB         (2) 4M x 36      (2) 4M x 36

      66MB         (2) 8M x 36     (2) 256K x 36

            DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1

      66MB        (2) 256K x 36     (2) 8M x 36

      68MB         (2) 8M x 36     (2) 512K x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 8M x 36      (2) 1M x 36

      72MB         (2) 1M x 36      (2) 8M x 36

      80MB         (2) 8M x 36      (2) 2M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      96MB         (2) 8M x 36      (2) 4M x 36

      96MB         (2) 4M x 36      (2) 8M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

                            CACHE CONFIGURATION

      Size          Bank 0              TAG                   SL1

   256KB (A)      (8) 32K x 8    (1) 8K/16K/32K x 8      Not installed

   256KB (B)         NONE               NONE               Installed

   512KB (A)      (8) 64K x 8     (1) 16K/32K x 8        Not installed

   512KB (B)         NONE               NONE               Installed

                        CACHE JUMPER CONFIGURATION

      Size               JP5               JP36               JP37

      256KB           pins 2 & 3        pins 2 & 3      pins 1 & 2 closed
                       closed             closed

      512KB           pins 1 & 2        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

  Note: These settings are only valid if standard cache is installed.

              CACHE CONFIGURATION

          Type                   JP38

     Standard cache        pins 1 & 2 closed

  Pipeline burst cache     pins 2 & 3 closed

                 CACHE VOLTAGE CONFIGURATION

       Voltage               JP3                  JP4

    Mixed voltage      pins 1 & 2 closed   pins 1 & 2 closed

        3.3v           pins 2 & 3 closed   pins 2 & 3 closed

                          CPU TYPE CONFIGURATION

         Type                     CN8                       JP32

        P54CX             pins A6 & A7, B6 & B7             Open
                                 closed

      P55C 2.5v                   Open             pins 1 & 2, 3 & 4, 5 &
                                                          6 closed

   P55C 2.5v on VRM          VRM installed                  Open

        P55CT                VRM installed                  Open

                  CPU SPEED CONFIGURATION

  Speed      JP28      JP29       JP31      JP40      JP41

  75MHz      Open      Open      1 & 2     1 & 2     1 & 2

  90MHz      Open     Closed     2 & 3     1 & 2     1 & 2

  100MHz    Closed    Closed     2 & 3     1 & 2     1 & 2

  120MHz     Open     Closed     2 & 3     1 & 2     2 & 3

  133MHz    Closed    Closed     2 & 3     1 & 2     2 & 3

  150MHz     Open     Closed     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                   CPU VOLTAGE CONFIGURATION

    Voltage          JP44            JP45            JP46

      3.3v          Closed           Open            Open

  3.45v - 3.6v       Open           Closed           Open

                             DMA CONFIGURATION

           DMA                     JP6                     JP7

           DMA 1            pins 2 & 3 closed       pins 2 & 3 closed

           DMA 3            pins 1 & 2 closed       pins 1 & 2 closed

                      PS/2 MOUSE CONFIGURATION

  Setting      JP19        JP20       JP21        JP22       JP23

  Disabled     2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  Enabled      1 & 2      1 & 2       1 & 2       1 & 2      1 & 2

  Note: Pins designated should be in the closed position.

                   FLASH BIOS CONFIGURATION

       Setting               JP50                 JP51

     Normal mode       pins 2 & 3 closed   pins 2 & 3 closed

  Programming mode     pins 1 & 2 closed   pins 1 & 2 closed

              MISCELLANEOUS TECHNICAL NOTE

  Note: The location of some pin 1s are unidentified.

