
GEMLIGHT COMPUTER, LTD.

GMB-P54SPS (VER. 2.00)

Processor                CX M1/Pentium
Processor Speed          75/90/100/120/133MHz
Chip Set                 SIS
Video Chip Set           None
Maximum Onboard Memory   128MB (EDO supported)
Maximum Video Memory     None
Cache                    256/512/1024KB
BIOS                     Award
Dimensions               270mm x 220mm
I/O Options              32-bit PCI slots (4), floppy drive interface, game
                         interface, green PC connector, IDE interfaces (2),
                         parallel port, serial ports (2)
NPU Options              None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Chassis fan power           J1       IDE interface 1             J9

  IDE interface LED           J2       Serial port 1              J12

  Power LED & keylock         J3       Serial port 2              J13

  Speaker                     J4       Game interface             J14

  Turbo switch                J5       Parallel port              J15

  Turbo LED                   J6       Floppy drive               J16
                                       interface

  Reset switch                J7       Green PC connector         JP11

  IDE interface 2             J8       32-bit PCI slots         PC1 - PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP1           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP1           Pins 2 & 3
                                                              closed

     Cache write cycle invalid during        JP4           Pins 2 & 3
      write cycle                                             closed

      Cache write cycle always invalid        JP4           Pins 1 & 2
                                                              closed

     CPU pipeline mode disabled              JP5           Pins 1 & 2
                                                              closed

      CPU pipeline mode enabled               JP5           Pins 2 & 3
                                                              closed

     CPU internal cache write select         JP6           Pins 1 & 2
      write back                                              closed

      CPU internal cache write select         JP6           Pins 2 & 3
      write through                                           closed

     Monitor type select color               JP12            Closed

      Monitor type select monochrome          JP12             Open

     Parallel port IRQ select IRQ7           JP18          Pins 1 & 2
                                                              closed

      Parallel port IRQ select IRQ5           JP18          Pins 2 & 3
                                                              closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

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

       6MB        (2) 512K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          None

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

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

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

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

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

                  DRAM CONFIGURATION (CONT)

        Size                Bank 0               Bank 1

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

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

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

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

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

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

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

        128MB            (2) 16M x 36             None

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

  Note: Board accepts EDO memory. Banks are interchangeable.

                  CACHE CONFIGURATION

       Size              Bank 0              TAG

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

       512KB          (8) 64K x 8      (1) 16K/32K x 8

        1MB           (8) 128K x 8       (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               JP7                JP8                JP9

      256KB           Pins 1 & 2         Pins 1 & 2           Closed
                       closed              closed

      512KB           Pins 2 & 3         Pins 1 & 2            Open
                       closed              closed

       1MB            Pins 2 & 3         Pins 2 & 3           Closed
                       closed              closed

                            CPU SPEED SELECTION

    CPU      Clock     Multiplier    JP0      S0         S1         S2
  speed      speed

  75MHz      50MHz        1.5x        1 &    Open       Open      Closed
                                      2

  90MHz      60MHz        1.5x        1 &    Open      Closed      Open
                                      2

  100MHz     66MHz        1.5x        1 &   Closed      Open      Closed
                                      2

  120MHz     60MHz         2x         2 &    Open      Closed      Open
                                      3

  133MHz     66MHz         2x         2 &   Closed      Open      Closed
                                      3

  Note: Pins designated should be in the closed position.

       CPU TYPE SELECTION

      Type           JP01

     CX M1          Closed

  P54C/CS/C-VR      Closed

  P54CT/C-VRE        Open

                           DMA CHANNEL SELECTION

          Channel                    JP22                    JP23

            Printer                 Open                    Open

                1              Pins 1 & 3 closed      Pins 1 & 3 closed

                3              Pins 2 & 4 closed      Pins 2 & 4 closed

                              BIOS SELECTION

           Type                      JP2                     JP3

            EPROM            Pins 2 & 3 closed       Pins 2 & 3 closed

           12v flash          Pins 1 & 2 closed       Pins 1 & 2 closed

            5v flash          Pins 2 & 3 closed       Pins 1 & 2 closed

