
VEXTREC TECHNOLOGY, INC.

GMB-P56IPS (VER. 3.02)

Device Type         Mainboard
Processor           CX 6X86/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed     75/90/100/110/120/133/150/166/200MHz
Chip Set            Intel 430TX
Maximum Onboard     128MB (EDO supported)
Memory
Cache               256/512KB
BIOS                Award/AMI
Dimensions          220mm x 230mm
I/O Options         32-bit PCI slots (4), floppy drive interface, IDE
                    interfaces(2), parallel port, PS/2 mouse port, serial
                    ports (2), IR connector, green PC connector, PS/2 mouse
                    interface, USB connectors (2)

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Reset switch              J1         USB 1 connector       J12/pins 2 -
                                                                  5

  Green PC connector        J2         PS/2 mouse            J12/pins 6 -
                                       interface                 10

  Green PC LED              J3         USB 2 connector      J12/pins 12 -
  connector                                                      15

  Speaker                   J4         IR connector         J12/pins 16 -
                                                                 20

  IDE interface LED         J5         Parallel port             J13

  Power LED &               J6         Serial port 2             J14
  keylock

  IDE interface 1           J9         Serial port 1             J15

  IDE interface 2          J10         PS/2 mouse port           J20

  Floppy drive             J11         32-bit PCI slots       PC1 - PC4
  interface

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Flash BIOS voltage select 5v            JP4           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 12v           JP4           Pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP5              Open

      CMOS memory clear                       JP5             Closed

                 DRAM CONFIGURATION

       Size            Bank 0            Bank 1

       4MB          (2) 512KB x 32        None

       8MB          (2) 512KB x 32   (2) 512KB x 32

       8MB          (2) 1MB x 32          None

       12MB         (2) 1MB x 32     (2) 512KB x 32

       16MB         (2) 1MB x 32      (2) 1MB x 32

       16MB         (2) 2MB x 32          None

       20MB         (2) 2MB x 32     (2) 512KB x 32

       24MB         (2) 2MB x 32      (2) 1MB x 32

       32MB         (2) 2MB x 32      (2) 2MB x 32

       32MB         (2) 4MB x 32          None

       36MB         (2) 4MB x 32     (2) 512KB x 32

       40MB         (2) 4MB x 32      (2) 1MB x 32

       48MB         (2) 4MB x 32      (2) 2MB x 32

       64MB         (2) 4MB x 32      (2) 4MB x 32

       64MB         (2) 8MB x 32          None

       68MB         (2) 8MB x 32     (2) 512KB x 32

       72MB         (2) 8MB x 32      (2) 1MB x 32

       80MB         (2) 8MB x 32      (2) 2MB x 32

       96MB         (2) 8MB x 32      (2) 4MB x 32

      128MB         (2) 8MB x 32      (2) 8MB x 32

                      CACHE CONFIGURATION

        Size               Bank 0                  TAG

        256K            (2) 32K x 32       16K x 8 or 32K x 8

        512K            (2) 64K x 32       16K x 8 or 32K x 8

                        CPU SPEED SELECTION (INTEL)

  Speed     Clock    Multiplier    JP6    JP7     S1        S2       S3
            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

  Note: Pins designated are in the closed position.

                      CPU SPEED SELECTION (INTEL MMX)

  Speed      Clock    Multiplier    JP6    JP7     S1       S2       S3
            speed

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

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

  Note: Pins designated are in the closed position.

                       CPU SPEED SELECTION (CX 6X86)

  Speed     Clock    Multiplier    JP6   JP7     S1        S2       S3
           speed

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

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

  150MHz   60MHz        2.5x       1 &   2 &    Closed    Open     Open
                                   2      3

  166MHz   66MHz        2.5x       1 &   2 &    Open     Closed    Open
                                   2      3

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

  Note: Pins designated are in the closed position.

                        CPU SPEED SELECTION (AM K5)

  Speed     Clock    Multiplier    JP6    JP7     S1        S2       S3
            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 &    1 &   Closed     Open     Open
                                    2      2

  133MHz    66MHz       1.5x       1 &    1 &    Open     Closed    Open
                                    2      2

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

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

  Note: Pins designated are in the closed position.

                      CPU VOLTAGE SELECTION (SINGLE)

   Voltage           Q2            JP1        S4         S5         S6

    3.4V        2 Transistors    Closed     Closed     Closed     Closed
                 installed

    3.5V        2 Transistors     Open      Closed     Closed     Closed
                 installed

                       CPU VOLTAGE SELECTION (DUAL)

  V i/O    V core          Q2             JP1       S4      S5       S6

  3.4V      2.8V      2 Transistors     Closed     Open    Open     Open
                        installed

                    DRAM VOLTAGE SELECTION

       Voltage                S7                   S8

         5V            Pins 1 & 2 closed   Pins 1 & 2 closed

        3.3V           Pins 2 & 3 closed   Pins 2 & 3 closed

