
J-MARK COMPUTER CORPORATION

J-571B

Device Type      Mainboard
Processor        CX 6X86/IBM 6X86/CX 686MX/AM K5/AM K6/Pentium
Processor Speed  75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set         SIS
Video Chip Set   None
Maximum Onboard  256MB (EDO & SDRAM supported)
Memory
Maximum Video    None
Memory
Cache            512KB
BIOS             Award
Dimensions       220mm x 220mm
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

  Speaker                     C1        PS/2 mouse                J4
                                        interface

  Reset switch                C2        Serial port 1             J6

  Turbo LED                   C3        Parallel port             J7

  IDE interface LED           C4        Serial port 2             J8

  Power LED & keylock         C5        USB connector 1          JP1

  Turbo switch/green PC       C6        USB connector 2          JP2
  connector

  IDE interface 2             CN1       Floppy drive             JP4
                                        interface

  IDE interface 1             CN2       CPU fan power            JP14

  IR connector                IR1       32-bit PCI slots      PC1  PC3

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Green PC connector                       C6           Pins 1 & 2
                                                              closed

      Turbo switch                             C6           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 12v           JP3           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 5v            JP3           Pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP7           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP7           Pins 2 & 3
                                                              closed

              SIMM CONFIGURATION

         Size                  Bank 0

          8MB                (2) 1M x 36

         16MB                (2) 2M x 36

         32MB                (2) 4M x 36

         64MB                (2) 8M x 36

         128MB              (2) 16M x 36

         256MB              (2) 32M x 36

            Note: Board accepts EDO memory.

               DIMM CONFIGURATION

      Size          Bank 0          Bank 1

      8MB         (1) 1M x 64        None

      16MB        (1) 2M x 64        None

      16MB        (1) 1M x 64     (1) 1M x 64

      24MB        (1) 2M x 64     (1) 1M x 64

      32MB        (1) 4M x 64        None

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

      40MB        (1) 4M x 64     (1) 1M x 64

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

      64MB        (1) 8M x 64        None

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

      72MB        (1) 8M x 64     (1) 1M x 64

      80MB        (1) 8M x 64     (1) 2M x 64

      96MB        (1) 8M x 64     (1) 4M x 64

     128MB       (1) 16M x 64        None

     128MB        (1) 8M x 64     (1) 8M x 64

     136MB       (1) 16M x 64     (1) 1M x 64

     144MB       (1) 16M x 64     (1) 2M x 64

     160MB       (1) 16M x 64     (1) 4M x 64

     192MB       (1) 16M x 64     (1) 8M x 64

     256MB       (1) 16M x 64    (1) 16M x 64

            Note: Board accepts SDRAM memory.

              CACHE CONFIGURATION

      Size          Bank 0           TAG

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

                        CPU SPEED SELECTION (CX 6X86)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  120MHz   50MHz       2x        On      Off     Off     On      On      On

  133MHz   55MHz       2x        On      Off     Off    Off      On      On

  150MHz   60MHz       2x        On      Off     Off     On      On     Off

  166MHz   66MHz       2x        On      Off     Off     On     Off      On

  200MHz   75MHz       2x        On      Off     Off    Off      On     Off

                        CPU SPEED SELECTION (IBM 6X86)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  120MHz   50MHz       2x        On      Off     Off     On      On      On

  133MHz   55MHz       2x        On      Off     Off    Off      On      On

  150MHz   60MHz       2x        On      Off     Off     On      On     Off

  166MHz   66MHz       2x        On      Off     Off     On     Off      On

  200MHz   75MHz       2x        On      Off     Off    Off      On     Off

                       CPU SPEED SELECTION (CX 6X86MX)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  166MHz   60MHz      2.5x       On      On      Off     On      On     Off

  166MHz   66MHz      2.5x       On      On      Off     On     Off      On

  200MHz   75MHz       2x        On      Off     Off    Off      On     Off

  233MHz   66MHz       3x        Off     On      Off     On     Off      On

                         CPU SPEED SELECTION (AM K5)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  90MHz    60MHz      1.5x       Off     Off     Off     On      On     Off

  100MHz   66MHz      1.5x       Off     Off     Off     On     Off      On

  133MHz   66MHz      1.5x       Off     Off     Off     On     Off      On

  166MHz   66MHz      2.5x       On      On      Off     On     Off      On

                         CPU SPEED SELECTION (AM K6)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  166MHz   66MHz      2.5x       On      On      Off     On     Off      On

  200MHz   66MHz       3x        Off     On      Off     On     Off      On

  266MHz   66MHz       4x        On      Off     On      On     Off      On

  300MHz   66MHz      4.5x       On      On      On      On     Off      On

                         CPU SPEED SELECTION (INTEL)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  75MHz    50MHz      1.5x       Off     Off     Off     On      On      On

  90MHz    60MHz      1.5x       Off     Off     Off     On      On     Off

  100MHz   66MHz      1.5x       Off     Off     Off     On     Off      On

  120MHz   60MHz       2x        On      Off     Off     On      On     Off

  133MHz   66MHz       2x        On      Off     Off     On     Off      On

  150MHz   60MHz      2.5x       On      On      Off     On      On     Off

  166MHz   66MHz      2.5x       On      On      Off     On     Off      On

  200MHz   66MHz       3x        Off     On      Off     On     Off      On

                       CPU SPEED SELECTION (INTEL MMX)

   CPU     Clock   Multiplier   JP9/1   JP9/2   JP9/3   JP9/4   JP9/5   JP9/6
  speed    speed

  166MHz   66MHz      2.5x       On      On      Off     On     Off      On

  200MHz   66MHz       3x        Off     On      Off     On     Off      On

  233MHz   66MHz      3.5x       Off     Off     Off     On     Off      On

                      CPU VOLTAGE SELECTION (SINGLE)

                Voltage                               JP13

                  3.3v                         Pins 1 & 2 closed

                   3.45v                        Pins 3 & 4 closed

                                CPU VOLTAGE SELECTION (DUAL)

  Voltage   JP11/pins  JP11/pins   JP11/pins   JP11/pins   JP11/pins   JP11/pins   JP11/pins
             1 & 2       3 & 4       5 & 6       7 & 8      9 & 10     11 & 12     13 & 14

   2.1v       Open       Open        Open        Open        Open        Open       Closed

   2.8v       Open       Open        Open        Open        Open       Closed       Open

   2.9v       Open       Open        Open        Open       Closed       Open        Open

   3.2v       Open       Open        Open       Closed       Open        Open        Open

   3.3v       Open       Open       Closed       Open        Open        Open        Open

  3.45v       Open      Closed       Open        Open        Open        Open        Open

  3.52v      Closed      Open        Open        Open        Open        Open        Open

