
CSS LABORATORIES, INC.

MB-4864

Processor   80486SX/SL80486SX/UMCU5/80486DX/SL80486DX/CXM7/
            AM486DX2/AM486DX2+/80486DX2/SL80486DX2/SL80486DX4/
            AM486DX5/P24D/CX M1SC/P24T
Processor   25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/
Speed       100(internal)/133(internal)MHz
Chip Set    ALI
Video Chip  None
Set
Maximum     128MB
Onboard
Memory
Maximum     None
Video
Memory
Cache       128/256/512KB
BIOS        AMI
Dimensions  254mm x 218mm
I/O Options 32-bit PCI slots (3), floppy drive interface, IDE interfaces
            (2), parallel port, PS/2 mouse interface, serial ports (2)
NPU Options None

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                 Location

  Parallel port            J4         Turbo LED                 JP31

  IDE interface 1          J5         Speaker                   JP32

  Floppy drive             J6         Power LED &               JP33
  interface                           keylock

  IDE interface 2          J7         Front panel               JP36
                                      connector

  Serial port 2            J8         Reset switch          JP38/pins 1 &
                                                                 2

  Serial port 1            J9         Turbo LED             JP38/pins 3 &
                                                                 4

  External battery         JP1        Auxiliary keyboard        JX1
                                      connector

  IDE interface LED       JP27        PS/2 mouse                JX2
  2                                   interface

  IDE interface LED       JP28        32-bit PCI slots       PC1  PC3
  1

  Turbo switch            JP30

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not          JP14          Unidentified
      alter (flash BIOS)

     Factory configured - do not          JP23          Unidentified
      alter

      Internal RTC enabled                 JP24              Open

      Internal RTC disabled                JP24             Closed

      Internal keyboard enabled            JP26              Open

      Internal keyboard disabled           JP26             Closed

     Factory configured - do not          JP29          Unidentified
      alter

     Factory configured - do not          JP35          Unidentified
      alter (IDE master)

     Factory configured - do not          JP37          Unidentified
      alter

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       4MB         (1) 1M x 36          None            None

       8MB         (1) 1M x 36      (1) 1M x 36         None

       8MB         (1) 2M x 36          None            None

      10MB         (1) 1M x 36      (1) 1M x 36     (1) 512K x 36

      10MB         (1) 2M x 36     (1) 512K x 36        None

      12MB         (1) 2M x 36      (1) 1M x 36         None

      12MB         (1) 1M x 36      (1) 1M x 36      (1) 1M x 36

      14MB         (1) 2M x 36      (1) 1M x 36     (1) 512K x 36

      16MB         (1) 4M x 36          None            None

      16MB         (1) 2M x 36      (1) 2M x 36         None

      20MB         (1) 4M x 36      (1) 1M x 36         None

      20MB         (1) 4M x 36     (1) 512K x 36    (1) 512K x 36

      22MB         (1) 4M x 36      (1) 1M x 36     (1) 512K x 36

      24MB         (1) 4M x 36      (1) 2M x 36         None

      24MB         (1) 4M x 36      (1) 1M x 36      (1) 1M x 36

      26MB         (1) 4M x 36      (1) 2M x 36     (1) 512K x 36

      28MB         (1) 4M x 36      (1) 2M x 36      (1) 1M x 36

                      DRAM CONFIGURATION (CONT)

       Size            Bank 0            Bank 1           Bank 2

       32MB          (1) 8M x 36          None             None

       32MB          (1) 4M x 36      (1) 4M x 36          None

       34MB          (1) 8M x 36     (1) 512K x 36         None

       34MB          (1) 4M x 36      (1) 4M x 36      (1) 512K x 36

       36MB          (1) 8M x 36     (1) 512K x 36     (1) 512K x 36

       38MB          (1) 8M x 36     (1) 512K x 36      (1) 1M x 36

       40MB          (1) 8M x 36      (1) 2M x 36          None

       40MB          (1) 8M x 36      (1) 1M x 36       (1) 1M x 36

       42MB          (1) 8M x 36      (1) 2M x 36      (1) 512K x 36

       44MB          (1) 8M x 36      (1) 2M x 36       (1) 1M x 36

       48MB          (1) 8M x 36      (1) 4M x 36          None

       48MB          (1) 4M x 36      (1) 4M x 36       (1) 4M x 36

       48MB          (1) 8M x 36      (1) 2M x 36       (1) 2M x 36

       50MB          (1) 8M x 36      (1) 4M x 36      (1) 512K x 36

       52MB          (1) 8M x 36      (1) 4M x 36       (1) 1M x 36

       56MB          (1) 8M x 36      (1) 4M x 36       (1) 2M x 36

       64MB          (1) 8M x 36      (1) 4M x 36       (1) 4M x 36

       64MB         (1) 16M x 36          None             None

       64MB          (1) 8M x 36      (1) 8M x 36          None

       66MB          (1) 8M x 36      (1) 8M x 36      (1) 512K x 36

       68MB          (1) 8M x 36      (1) 8M x 36       (1) 1M x 36

       68MB         (1) 16M x 36      (1) 1M x 36          None

       70MB         (1) 16M x 36      (1) 1M x 36      (1) 512K x 36

       72MB         (1) 16M x 36      (1) 2M x 36          None

       72MB         (1) 16M x 36      (1) 1M x 36       (1) 1M x 36

       74MB         (1) 16M x 36      (1) 2M x 36      (1) 512K x 36

       76MB         (1) 16M x 36      (1) 2M x 36       (1) 1M x 36

       80MB         (1) 16M x 36      (1) 4M x 36          None

       80MB         (1) 16M x 36      (1) 2M x 36       (1) 2M x 36

       82MB         (1) 16M x 36      (1) 4M x 36      (1) 512K x 36

       84MB         (1) 16M x 36      (1) 4M x 36       (1) 1M x 36

       88MB         (1) 16M x 36      (1) 4M x 36       (1) 2M x 36

       96MB         (1) 16M x 36      (1) 8M x 36          None

       96MB         (1) 16M x 36      (1) 4M x 36       (1) 4M x 36

       98MB         (1) 16M x 36      (1) 8M x 36      (1) 512K x 36

      100MB         (1) 16M x 36      (1) 8M x 36       (1) 1M x 36

      104MB         (1) 16M x 36      (1) 8M x 36       (1) 2M x 36

      112MB         (1) 16M x 36      (1) 8M x 36       (1) 4M x 36

      128MB         (1) 16M x 36      (1) 16M x 36         None

      128MB         (1) 16M x 36      (1) 8M x 36       (1) 8M x 36

  Note: Board accepts x 32 SIMMs. 512KB x 32/36 is not recommended.

                       CACHE CONFIGURATION

         Size                Bank 0                  TAG

        128KB              (4) 32K x 8       (1) 8K/16K/32K x 8

        256KB              (4) 64K x 8         (1) 16K/32K x 8

        512KB             (4) 128K x 8           (1) 32K x 8

  Note: The location of bank 0 & the TAG is unidentified.

  CACHE JUMPER CONFIGURATION

   Size      JP21      JP22

  128KB      Open      Open

  256KB      Open     Closed

  512KB     Closed    Closed

                       CPU SPEED SELECTION

   Speed      JP15       JP16       JP17       JP18       JP25

   25MHz     Closed      Open       Open       1 & 2      Open

   33MHz     Closed      Open      Closed      1 & 2      Open

   40MHz      Open      Closed     Closed      2 & 3     Closed

  50iMHz     Closed      Open       Open       1 & 2      Open

  66iMHz     Closed      Open      Closed      1 & 2      Open

  75iMHz     Closed      Open       Open       1 & 2      Open

  80iMHz      Open      Closed     Closed      2 & 3     Closed

  100iMHz    Closed      Open      Closed      1 & 2      Open

  133iMHz    Closed      Open      Closed      1 & 2      Open

  Note: Pins designated should be in the closed position.

                            CPU TYPE SELECTION

      Type           JP5          JP6         JP7       JP8        JP9

     80486SX         Open         Open       1 & 2     Open        Open

    SL80486SX       Closed        Open       3 & 4     3 & 4      3 & 4

     UMC U5          Open         Open       1 & 2     1 & 2      1 & 2

     80486DX         Open         Open       1 & 2     Open        Open

    SL80486DX       Closed        Open       3 & 4     3 & 4      3 & 4

      CX M7         Closed        Open       5 & 6     5 & 6      5 & 6

    AM486DX2         Open        Closed      1 & 2     Open        Open

   AM486DX2-66       Open        Closed      1 & 2     Open        Open

   AM486DX2-80       Open        Closed      1 & 2     Open        Open

  AM486DX2-100       Open        Closed      1 & 2     Open        Open

  AM486DX2+-66      Closed        Open       3 & 4     3 & 4      3 & 4

  AM486DX2+-80      Closed        Open       3 & 4     3 & 4      3 & 4

  AM486DX2+-100     Closed        Open       3 & 4     3 & 4      3 & 4

    80486DX2         Open         Open       1 & 2     Open        Open

   SL80486DX2       Closed        Open       3 & 4     3 & 4      3 & 4

   SL80486DX4       Closed        Open       3 & 4     3 & 4      3 & 4

    AM486DX5         Open         Open       1 & 2     Open        Open

      P24D          Closed        Open       3 & 4     3 & 4      3 & 4

     CX M1SC        Closed        Open       3 & 4     3 & 4      3 & 4

      P24T          Closed        Open       3 & 4     3 & 4      3 & 4

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CONT)

       Type           JP10       JP11       JP12       JP13        JP34

      80486SX         Open       1 & 2      1 & 2      Open        Open

     SL80486SX        Open       1 & 2      1 & 2      Open        Open

      UMC U5          Open       1 & 2      1 & 2      Open        Open

      80486DX         Open       1 & 2      2 & 3      2 & 3       Open

     SL80486DX        Open       1 & 2      2 & 3      2 & 3       Open

       CX M7         1 & 2       1 & 2      2 & 3      2 & 3      1 & 2

     AM486DX2         Open       1 & 2      2 & 3      2 & 3       Open

    AM486DX2-66       Open       1 & 2      2 & 3      2 & 3       Open

    AM486DX2-80       Open       1 & 2      2 & 3      2 & 3       Open

   AM486DX2-100       Open       1 & 2      2 & 3      2 & 3       Open

   AM486DX2+-66     1 & 3, 5     2 & 3      2 & 3      2 & 3      2 & 3
                      & 6

   AM486DX2+-80     1 & 3, 5     2 & 3      2 & 3      2 & 3      2 & 3
                      & 6

   AM486DX2+-100     5 & 6       2 & 3      2 & 3      2 & 3      2 & 3

     80486DX2         Open       1 & 2      2 & 3      2 & 3       Open

    SL80486DX2        Open       1 & 2      2 & 3      2 & 3       Open

    SL80486DX4        Open       1 & 2      2 & 3      2 & 3       Open

     AM486DX5         Open       1 & 2      2 & 3      2 & 3       Open

       P24D          5 & 6       2 & 3      2 & 3      2 & 3      2 & 3

      CX M1SC        5 & 6       2 & 3      2 & 3      2 & 3      2 & 3

       P24T           Open       2 & 3      2 & 3      1 & 2      2 & 3

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

     Voltage              JP2               JP3                JP4

       3.3v            Pins 2 & 3        Pins 2 & 3         Pins 7 & 8
                        closed             closed             closed

      3.45v            Pins 2 & 3        Pins 2 & 3         Pins 5 & 6
                        closed             closed             closed

       3.6v            Pins 2 & 3        Pins 2 & 3         Pins 3 & 4
                        closed             closed             closed

        4v             Pins 2 & 3        Pins 2 & 3         Pins 1 & 2
                        closed             closed             closed

        5v             Pins 1 & 2        Pins 1 & 2            Open
                        closed             closed

                           DMA CHANNEL SELECTION

         Channel                   JP19                     JP20

             1             Pins 2 & 3 closed        Pins 2 & 3 closed

              3             Pins 1 & 2 closed        Pins 1 & 2 closed

