
M TECHNOLOGY, INC.

R525 PENTIUM PCI (VER.2)

Processor              Pentium
Processor Speed        75/90/100/120/133/150MHz
Chip Set               Intel
Video Chip Set         None
Maximum Onboard Memory 128MB (EDO supported)
Maximum Video Memory   None
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       Power LED & keylock         J1

  Serial port 1              CN2       Speaker                     J2

  Serial port 2              CN3       Turbo switch                J3

  Parallel port              CN4       Turbo LED                   J4

  Floppy drive interface     CN5       Reset switch                J5

  IDE interface 1            CN6       Green PC connector          J6

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

  VRM connector              CN8       Cache slot                 SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Pipeline disabled                       JP42             Open

      Pipeline enabled                        JP42            Closed

     Cache type select write back            JP43             Open

      Cache type select write through         JP43            Closed

     CMOS memory normal operation            JP54             Open

      CMOS memory clear                       JP54            Closed

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

      8MB        (2) 1M x 36      None

     16MB        (2) 2M x 36      None

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

     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

     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

  Note: Board accepts EDO memory.

                            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              256KB module
                                                           installed

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

   512KB (B)         None               None              512KB module
                                                           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 SPEED SELECTION

  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 TYPE SELECTION

         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 VOLTAGE SELECTION

    Voltage          JP44            JP45            JP46

      3.3v          Closed           Open            Open

  3.45v - 3.6v       Open           Closed           Open

                           DMA CHANNEL SELECTION

         Channel                   JP6                      JP7

              1             Pins 2 & 3 closed        Pins 2 & 3 closed

             3             Pins 1 & 2 closed        Pins 1 & 2 closed

                        PS/2 MOUSE SELECTION

  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 SELECTION

       Setting               JP50                 JP51

     Normal mode       Pins 2 & 3 closed   Pins 2 & 3 closed

  Programming mode     Pins 1 & 2 closed   Pins 1 & 2 closed

