
GEMLIGHT COMPUTER, LTD.

GMB-P55IPS (VER. 1.50)

Processor            CX M1/AM K5/Pentium
Processor Speed      75/90/100/120/133/150/166/200MHz
Chip Set             Intel
Video Chip Set       None
Maximum Onboard      256MB (EDO supported)
Memory
Maximum Video Memory None
Cache                256/512KB
BIOS                 Award
Dimensions           265mm x 220mm
I/O Options          32-bit PCI slots (4), floppy drive interface, green PC
                     connector, IDE interfaces (2), parallel port, PS/2
                     mouse interface, serial ports (2), IR connector, USB
                     connectors (2)
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  IR connector                J1       Parallel port              J11

  Power LED & keylock         J2       Serial port 2              J12

  Speaker                     J4       Serial port 1              J13

  IDE interface LED           J5       PS/2 mouse interface       J16

  IDE interface 1             J6       Turbo LED                  J19

  IDE interface 2             J7       Green PC connector         JP8

  Floppy drive interface      J8       Reset switch               JP11

  USB connector 1             J9       32-bit PCI slots         PC1 - PC4

  USB connector 2            J10

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           J3           Unidentified
      alter

     CMOS memory normal operation         JP13              Open

      CMOS memory clear                    JP13             Closed

      Flash BIOS voltage select 12v        JP20        Pins 1 & 2 closed

      Flash BIOS voltage select 5v         JP20        Pins 2 & 3 closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       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

      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

                        DRAM CONFIGURATION (CONT)

          Size                    Bank 0                  Bank 1

          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

          130MB                (2) 16M x 36            (2) 256K x 36

          132MB                (2) 16M x 36            (2) 512K x 36

          136MB                (2) 16M x 36             (2) 1M x 36

          144MB                (2) 16M x 36             (2) 2M x 36

          160MB                (2) 16M x 36             (2) 4M x 36

          192MB                (2) 16M x 36             (2) 8M x 36

          256MB                (2) 16M x 36            (2) 16M x 36

  Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. Banks
  are interchangeable.

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

       256KB          (2) 32K x 32          None            (1) 8K x 8

       512KB          (2) 32K x 32      (2) 32K x 32     (1) 16K/32K x 8

       512KB          (2) 64K x 32          None         (1) 16K/32K x 8

  Note: The location of banks 0 & 1 are unidentified.

                        CPU SPEED SELECTION (CYRIX)

  CPU speed      Clock      Multiplier      JP1        JP2        JP18
                speed

   120MHz       50MHz           2x         Closed      Open    1 & 2, 3 &
                                                                   4

   133MHz       55MHz           2x         Closed      Open       Open

   150MHz       60MHz           2x         Closed      Open      3 & 4

   166MHz       66MHz           2x         Closed      Open      1 & 2

   200MHz       66MHz           3x         Closed      Open      5 & 6

  Note: Pins designated should be in the closed position.

                         CPU SPEED SELECTION (AMD)

  CPU speed     Clock      Multiplier       JP1        JP2        JP18
                speed

   75MHz        50MHz         1.5x         Open        Open      1 & 2, 3
                                                                   & 4

   90MHz        60MHz         1.5x         Open        Open       3 & 4

   100MHz       66MHz         1.5x         Open        Open       1 & 2

   120MHz       60MHz         1.5x         Open        Open       3 & 4

   133MHz       66MHz         1.5x         Open        Open       1 & 2

   150MHz       66MHz         1.5x         Open        Open       1 & 2

   166MHz       66MHz         2.5x        Closed      Closed      1 & 2

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

  CPU speed      Clock     Multiplier       JP1        JP2        JP18
                speed

    75MHz       50MHz         1.5x          Open       Open      1 & 2, 3
                                                                   & 4

    90MHz       60MHz         1.5x          Open       Open       3 & 4

   100MHz       66MHz         1.5x          Open       Open       1 & 2

   120MHz       60MHz          2x          Closed      Open       3 & 4

   133MHz       66MHz          2x          Closed      Open       1 & 2

   150MHz       60MHz         2.5x         Closed     Closed      3 & 4

   166MHz       66MHz         2.5x         Closed     Closed      1 & 2

   200MHz       66MHz          3x           Open      Closed      1 & 2

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

     Voltage        V core          JP9          JP10           JP14

  3.4v (single)       N/A          Open         Closed      1 & 2, 3 & 4,
                                                            5 & 6, 7 & 8

   3.4v (dual)       2.8v          Open         Closed          Open

  3.5v (single)       N/A         Closed         Open       1 & 2, 3 & 4,
                                                            5 & 6, 7 & 8

  Note: Pins designated should be in the closed position.

