
BCM ADVANCED RESEARCH, INC.

SQ578

Processor        CX 6X86/CX 6X86L/CX 686MX/IDT-C6/AM K5/Pentium
Processor Speed  75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set         SIS
Video Chip Set   Unidentified
Maximum Onboard  256MB
Memory
Maximum Video    Unidentified
Memory
Cache            256/512KB
BIOS             Unidentified
Dimensions       270mm 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), VGA feature connector, VGA
                 interface, IR connector, USB connector
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  PS/2 mouse                J1         External battery         J29
  interface

  Serial port 1             J5         Chassis fan power        J30

  USB connector             J6         Power LED &         J31/pins 1 - 5
                                       keylock

  Serial port 2             J9         Speaker              J31/pins 7 -
                                                                 10

  Floppy drive             J21         IDE interface LED    J31/pins 12 &
  interface                                                      24

  Parallel port            J22         Reset switch         J31/pins 21 &
                                                                 22

  VGA feature              J25         Green PC                 J32
  connector                            connector

  IDE interface 2          J26         Green PC LED             J33

  VGA interface            J27         IR connector             J34

  IDE interface 1          J28         32-bit PCI slots      PC1  PC4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP1           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP1           Pins 2 & 3
                                                              closed

      Cyrix linear bust mode select           JP18             Open
      interleave burst

      Cyrix linear bust mode select           JP18            Closed
      linear burst

              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

      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

        DIMM VOLTAGE CONFIGURATION

       Voltage               JP2

        3.3v          Pins 2 & 3 closed

         5v           Pins 1 & 2 closed

      CACHE CONFIGURATION

      Size          Bank 0

     256KB       (2) 32K x 32

     512KB       (2) 64K x 32

                      CPU SPEED SELECTION (CX 6X86/6X86L)

   CPU     Clock   Multiplier    JP4      JP5      JP6      JP7     JP8    JP9
  speed    speed

  120MHz   50MHz       2x       Closed   Closed    Open    Closed   Open   Open

  133MHz   55MHz       2x        Open     Open     Open    Closed   Open   Open

  150MHz   60MHz       2x        Open    Closed    Open    Closed   Open   Open

  166MHz   66MHz       2x       Closed    Open     Open    Closed   Open   Open

  200MHz   75MHz       2x       Closed   Closed   Closed   Closed   Open   Open

                         CPU SPEED SELECTION (CX 6X86MX)

   CPU     Clock   Multiplier    JP4      JP5      JP6      JP7      JP8     JP9
  speed    speed

  133MHz   50MHz       2x       Closed   Closed    Open    Closed   Open     Open

  133MHz   55MHz       2x        Open     Open     Open    Closed   Open     Open

  150MHz   60MHz       2x        Open    Closed    Open    Closed   Open     Open

  150MHz   50MHz      2.5x      Closed   Closed    Open    Closed   Closed   Open

  166MHz   66MHz       2x       Closed    Open     Open    Closed   Open     Open

  166MHz   75MHz      2.5x       Open     Open     Open    Closed   Closed   Open

  166MHz   50MHz       3x       Closed   Closed    Open    Open     Closed   Open

  166MHz   60MHz      2.5x       Open    Closed    Open    Closed   Closed   Open

  200MHz   75MHz       2x       Closed   Closed   Closed   Closed   Open     Open

  200MHz   75MHz       3x        Open     Open     Open    Open     Closed   Open

  200MHz   55MHz      2.5x      Closed    Open     Open    Closed   Closed   Open

  200MHz   60MHz       3x        Open    Closed    Open    Open     Closed   Open

  233MHz   75MHz      2.5x      Closed   Closed   Closed   Closed   Closed   Open

  233MHz   66MHz       3x       Closed    Open     Open    Open     Closed   Open

  266MHz   66MHz      3.5x      Closed    Open     Open    Open     Open     Open

  266MHz   75MHz       3x       Closed   Closed   Closed   Open     Closed   Open

                            CPU SPEED SELECTION (AMD)

   CPU     Clock   Multiplier    JP4      JP5     JP6     JP7      JP8      JP9
  speed    speed

  75MHz    50MHz      1.5x      Closed   Closed   Open   Open     Open     Open

  90MHz    60MHz      1.5x       Open    Closed   Open   Open     Open     Open

  100MHz   66MHz      1.5x      Closed    Open    Open   Open     Open     Open

  120MHz   60MHz       2x        Open    Closed   Open   Closed   Open     Open

  133MHz   66MHz       2x       Closed    Open    Open   Closed   Open     Open

  150MHz   60MHz      2.5x       Open    Closed   Open   Closed   Closed   Open

  166MHz   66MHz      2.5x      Closed    Open    Open   Closed   Closed   Open

  200MHz   66MHz       3x       Closed    Open    Open   Open     Closed   Open

  233MHz   66MHz      3.5x      Closed    Open    Open   Open     Open     Open

  266MHz   66MHz       4x       Closed    Open    Open   Closed   Open     Closed

  300MHz   66MHz      4.5x      Closed    Open    Open   Closed   Closed   Closed

                           CPU SPEED SELECTION (IDT-C6)

   CPU     Clock   Multiplier    JP4      JP5      JP6      JP7      JP8     JP9
  speed    speed

  150MHz   50MHz       3x       Closed   Closed    Open    Open     Closed   Open

  150MHz   75MHz       2x       Closed   Closed   Closed   Closed   Open     Open

  180MHz   60MHz       3x        Open    Closed    Open    Open     Closed   Open

  200MHz   66MHz       3x       Closed    Open     Open    Open     Closed   Open

                           CPU SPEED SELECTION (INTEL)

   CPU     Clock   Multiplier    JP4      JP5     JP6     JP7      JP8      JP9
  speed    speed

  75MHz    50MHz      1.5x      Closed   Closed   Open   Open     Open     Open

  90MHz    60MHz      1.5x       Open    Closed   Open   Open     Open     Open

  100MHz   66MHz      1.5x      Closed    Open    Open   Open     Open     Open

  120MHz   60MHz       2x        Open    Closed   Open   Closed   Open     Open

  133MHz   66MHz       2x       Closed    Open    Open   Closed   Open     Open

  150MHz   60MHz      2.5x       Open    Closed   Open   Closed   Closed   Open

  166MHz   66MHz      2.5x      Closed    Open    Open   Closed   Closed   Open

  200MHz   66MHz       3x       Closed    Open    Open   Open     Closed   Open

  233MHz   66MHz      3.5x      Closed    Open    Open   Open     Open     Open

  266MHz   66MHz       4x       Closed    Open    Open   Closed   Open     Closed

  300MHz   66MHz      4.5x      Closed    Open    Open   Closed   Closed   Closed

                      CPU VOLTAGE SELECTION (SINGLE)

  Voltage    JP10    JP11     JP12     JP13      JP14      JP15     JP16

   3.38v     Open    Open     Open    Closed     Open      1 & 2   1 & 2

   3.52v     Open    Open     Open     Open     Closed     1 & 2   1 & 2

  Note: Pins designated should be in the closed position.

                       CPU VOLTAGE SELECTION (DUAL)

  Voltage     V      JP10     JP11     JP12    JP13    JP14   JP15   JP16
            core

   3.3v     2.1      Open     Open     Open    Open    Open   2 &     2 &
                                                               3      3

   3.3v     2.8     Closed    Open     Open    Open    Open   2 &     2 &
                                                               3      3

   3.3v     2.9      Open    Closed    Open    Open    Open   2 &     2 &
                                                               3      3

   3.3v     3.2      Open     Open    Closed   Open    Open   2 &     2 &
                                                               3      3

  Note: Pins designated should be in the closed position.

                    ON BOARD VGA SELECTION

       Setting               JP3                  JP17

       Enabled         Pins 2 & 3 closed          Open

      Disabled         Pins 1 & 2 closed         Closed

  Note: these jumpers are optional and may not be present.

