
GEMLIGHT COMPUTER, LTD.

GMB-P56SPC (VER. 1.11)

Processor           CX M1/AM K5/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            SIS
Video Chip Set      None
Maximum Onboard     512MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256KB
BIOS                AMI/Award
Dimensions          270mm x 220mm
I/O Options         32-bit PCI slots (4), CD-ROM connectors (2), floppy
                    drive interface, green PC connector, IDE interfaces
                    (2), parallel port, PS/2 mouse interface, serial ports
                    (2), VGA feature connector, VGA interface, IR
                    connectors (2), game interface
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                       Location     Purpose            Location

  Reset switch                     J1        IDE interface 1      J17

  Green PC LED                     J2        IDE interface 2      J18

  Green PC connector               J3        Serial port 1        J19

  Speaker                          J4        Serial port 2        J20

  IDE interface LED                J5        Audio expansion      J21
                                             interface

  Power LED & keylock              J6        Game interface       J23

  IR connector                     J12       PS/2 mouse           J28
                                             interface

  CD-ROM connector                 J13       VGA feature          J29
  (Panasonic/Mitsumi)                        connector

  CD-ROM connector (Sony)          J14       IR connector         J33

  Floppy drive interface           J15       32-bit PCI        PC1 - PC4
                                             slots

  Parallel port                    J16

  Note: J21 may be a 2 x 8 connector on some board revisions.

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP0           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP0           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 12v           JP5           Pins 1 & 2
                                                              closed

      Flash BIOS voltage select 5v            JP5           Pins 2 & 3
                                                              closed

      Linear burst mode enabled (CX M1        JP7             Closed
      only)

      Linear burst mode disabled (all         JP7              Open
      other CPU types)

      On board sound chip enabled             JP13            Closed

      On board sound chip disabled            JP13             Open

             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

     32MB        (2) 4M x 36      None

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

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

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

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

                        DRAM CONFIGURATION (CONT)

          Size                    Bank 0                   Bank 1

          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

          256MB                (2) 32M x 36                 None

          264MB                (2) 32M x 36             (2) 1M x 36

          272MB                (2) 32M x 36             (2) 2M x 36

          288MB                (2) 32M x 36             (2) 4M x 36

          320MB                (2) 32M x 36             (2) 8M x 36

          384MB                (2) 32M x 36             (2) 16M x 36

          512MB                (2) 32M x 36             (2) 32M x 36

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

                     CACHE CONFIGURATION

        Size                Bank 0                TAG

        256KB            (2) 32K x 32      (1) 8K16K/32K x 8

                        CPU SPEED SELECTION (CYRIX)

    CPU     Clock    Multiplier    JP2   JP3     S4       S5        S6
  speed     speed

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

  133MHz    55MHz        2x        1 &   2 &    Open     Open      Open
                                   2      3

  150MHz    60MHz        2x        1 &   2 &    Closed   Open      Open
                                   2      3

  166MHz    66MHz        3x        1 &   2 &    Open     Closed    Open
                                   2      3

  200MHz    66MHz        3x        1 &   2 &    Open     Open     Closed
                                   2      3

  Note: Pins designated should be in the closed position.

                         CPU SPEED SELECTION (AMD)

    CPU      Clock   Multiplier     JP2   JP3     S4        S5       S6
  speed     speed

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

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

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

  120MHz    60MHz       1.5x        1 &   1 &    Closed    Open     Open
                                    2      2

  133MHz    66MHz        2x         1 &   1 &    Open      Closed   Open
                                    2      2

  150MHz    66MHz        2x         1 &   2 &    Closed    Open     Open
                                    2      3

  166MHz    66MHz        2x         1 &   2 &    Open      Closed   Open
                                    2      3

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

    CPU      Clock   Multiplier     JP2   JP3     S4        S5       S6
  speed     speed

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

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

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

  120MHz    60MHz        2x         1 &   2 &    Closed    Open     Open
                                    2      3

  133MHz    66MHz        2x         1 &   2 &    Open      Closed   Open
                                    2      3

  150MHz    60MHz       2.5x        2 &   2 &    Closed    Open     Open
                                    3      3

  166MHz    66MHz       2.5x        2 &   2 &    Open      Closed   Open
                                    3      3

  180MHz    60MHz        3x         2 &   1 &    Closed    Open     Open
                                    3      2

  200MHz    66MHz        3x         2 &   1 &    Open      Closed   Open
                                    3      2

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

    Voltage      V core       JP1          S1          S2          S3

      3.4v         N/A       Closed      Closed      Closed      Closed
   (single)

  3.4v (dual)     2.9v       Closed       Open        Open        Open

      3.5v         N/A        Open       Closed      Closed      Closed
   (single)

