
J-MARK COMPUTER CORPORATION

J-656VXDP

Processor           CX 6X86/AM K5/AM K6/Pentium
Processor Speed     75/90/100/120/133/150/166/200/233MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     512MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                Award
Dimensions          254mm x 218mm
I/O Options         32-bit PCI slots (3), 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                C1       Serial port 2               J2

  IDE interface LED           C2       Serial port 1               J3

  Reset switch                C3       IDE interface 2             J4

  Speaker                     C4       IDE interface 1             J5

  Power LED & keylock         C5       Floppy drive                J6
                                       interface

  Green PC connector          C6       Parallel port               J7

  Turbo LED                   C7       USB connector              JP1

  Turbo switch                C8       USB connector              JP2

  PS/2 mouse interface        J1       32-bit PCI slots         PC1  PC3

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Flash BIOS voltage select 12v           JP4           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 5v            JP4           Pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP5              Open

      CMOS memory clear                       JP5             Closed

              SIMM 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) 4M x 36    (2) 2M 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) 8M x 36    (2) 2M x 36

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

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

     128MB        (2) 16M x 36       None

     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.

             DIMM CONFIGURATION

     Size          Bank 0        Bank 1

     32MB        (1) 2M x 64   (1) 2M x 64

     48MB        (1) 4M x 64   (1) 2M x 64

     64MB        (1) 4M x 64   (1) 4M x 64

              CACHE CONFIGURATION

      Size          Bank 0           TAG

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

     512KB        (2) 64K x 32   (1) 32K x 8

                       CPU SPEED SELECTION (CX 6X86)

    CPU     Clock    Multiplier    BF0   BF1     FS0      FS1       FS2
  speed     speed

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

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

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

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

  200MHz    75MHz        3x        2 &   1 &    Open     Closed    Open
                                   3      2

                        CPU SPEED SELECTION (AM K5)

    CPU     Clock    Multiplier    BF0   BF1     FS0      FS1       FS2
  speed     speed

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

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

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

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

                        CPU SPEED SELECTION (AM K6)

    CPU      Clock   Multiplier    BF0    BF1     FS0      FS1      FS2
  speed     speed

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

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

  233MHz    66MHz       3.5x        1 &    1 &   Closed    Open   Closed
                                    2      2

                        CPU SPEED SELECTION (INTEL)

    CPU     Clock    Multiplier    BF0   BF1     FS0      FS1       FS2
  speed     speed

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

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

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

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

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

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

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

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

  233MHz    66MHz       3.5x       1 &   1 &    Closed    Open     Closed
                                   2      2

                           CPU VOLTAGE SELECTION

      Voltage           V core             JP11               JP12

       3.3v              2.8v           Pins 1 & 2      Pins 1 & 2 closed
                                          closed

       3.3v              3.3v           Pins 2 & 3      Pins 1 & 2 closed
                                          closed

       3.3v              3.45v          Pins 4 & 5      Pins 1 & 2 closed
                                          closed

       3.3v              3.52v          Pins 5 & 6      Pins 1 & 2 closed
                                          closed

       3.52v             2.8v           Pins 1 & 2      Pins 2 & 3 closed
                                          closed

       3.52v             3.3v           Pins 2 & 3      Pins 2 & 3 closed
                                          closed

       3.52v             3.45v          Pins 4 & 5      Pins 2 & 3 closed
                                          closed

       3.52v             3.52v          Pins 5 & 6      Pins 2 & 3 closed
                                          closed

