
UNIDENTIFIED

MB-4D50AV

Processor   CXM6/SL80486SX/80486SX/CXM7/AM486DXLV-S/SL80486DX/80486DX/
            80486DX2/Pentium Overdrive
Processor   25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set    ALI
Max.        128MB
Onboard
DRAM
Cache       128/256KB
BIOS        AMI
Dimensions  254mm x 218mm
I/O Options 32-bit VESA local bus slots (3), green PC connector
NPU Options None

[Image]

                                CONNECTIONS

  Purpose           Location     Purpose                       Location

  Reset switch         J1        Green PC connector               JP9

  Turbo LED            J2        Green PC connector              JP10
                                 (monitor)

  External             J3        Green PC                        JP32
  battery                        connector-(external input)

  Turbo switch         J4        Green PC connector-(ring        JP33
                                 input)

  Power LED &          J5        32-bit VESA local bus         SL1 - SL3
  keylock                        slots

  Speaker              J6

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     Battery type select internal              J3             Open

      Battery type select external              J3            Closed

      CMOS memory clear                         J3           pins 2 & 3
                                                              closed

     Real time clock enabled                  JP12          pins 1 & 2
                                                              closed

      Real time clock disabled                 JP12          pins 2 & 3
                                                              closed

     Monitor type select color                JP13           Closed

      Monitor type select monochrome           JP13            Open

     CPU type select P24T/CXM6/CXM7 2x        JP20           Closed

      CPU type select CXM6/CXM7 1x             JP20            Open

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB           NONE           NONE           NONE       (1) 256K x 36

     2MB           NONE           NONE        (1) 256K x    (1) 256K x 36
                                                  36

     2MB           NONE           NONE           NONE       (1) 512K x 36

     3MB           NONE        (1) 256K x        NONE       (1) 512K x 36
                                   36

     3MB           NONE        (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     4MB           NONE           NONE           NONE        (1) 1M x 36

     4MB           NONE        (1) 512K x        NONE       (1) 512K x 36
                                   36

     4MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     5MB           NONE           NONE        (1) 256K x     (1) 1M x 36
                                                  36

     5MB           NONE           NONE       (1) 1M x 36    (1) 256K x 36

     6MB           NONE       (1) 1M x 36        NONE       (1) 512K x 36

     6MB           NONE        (1) 256K x     (1) 256K x     (1) 1M x 36
                                   36             36

     6MB           NONE       (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     6MB           NONE        (1) 256K x    (1) 1M x 36    (1) 256K x 36
                                   36

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

     8MB           NONE           NONE           NONE        (1) 2M x 36

     9MB           NONE        (1) 256K x        NONE        (1) 2M x 36
                                   36

     9MB           NONE       (1) 1M x 36     (1) 256K x     (1) 1M x 36
                                                  36

     9MB           NONE        (1) 256K x    (1) 1M x 36     (1) 1M x 36
                                   36

     9MB           NONE       (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

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

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

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

     12MB          NONE       (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     13MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     16MB          NONE           NONE           NONE        (1) 4M x 36

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

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

     17MB          NONE           NONE        (1) 256K x     (1) 4M x 36
                                                  36

     17MB          NONE           NONE       (1) 4M x 36    (1) 256K x 36

     18MB          NONE       (1) 4M x 36        NONE       (1) 512K x 36

     18MB          NONE        (1) 256K x     (1) 256K x     (1) 4M x 36
                                   36             36

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     18MB          NONE       (1) 4M x 36     (1) 256K x    (1) 256K x 36
                                                 36

     18MB          NONE        (1) 256K x    (1) 4M x 36    (1) 256K x 36
                                  36

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

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

     21MB          NONE       (1) 1M x 36     (1) 256K x     (1) 4M x 36
                                                 36

     21MB          NONE       (1) 4M x 36     (1) 256K x     (1) 1M x 36
                                                 36

     21MB          NONE        (1) 256K x    (1) 1M x 36     (1) 4M x 36
                                  36

     21MB          NONE       (1) 4M x 36    (1) 1M x 36    (1) 256K x 36

     21MB          NONE        (1) 256K x    (1) 4M x 36     (1) 1M x 36
                                  36

     21MB          NONE       (1) 1M x 36    (1) 4M x 36    (1) 256K x 36

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

     24MB          NONE       (1) 1M x 36    (1) 1M x 36     (1) 4M x 36

     24MB          NONE       (1) 4M x 36    (1) 1M x 36     (1) 1M x 36

     24MB          NONE       (1) 1M x 36    (1) 4M x 36     (1) 1M x 36

     25MB       (1) 4M x 36   (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

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

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

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

     32MB          NONE          NONE           NONE         (1) 8M x 36

     33MB          NONE        (1) 256K x       NONE         (1) 8M x 36
                                  36

     33MB          NONE       (1) 4M x 36     (1) 256K x     (1) 4M x 36
                                                 36

     33MB          NONE        (1) 256K x    (1) 4M x 36     (1) 4M x 36
                                  36

     33MB          NONE       (1) 4M x 36    (1) 4M x 36    (1) 256K x 36

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

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

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

     36MB          NONE       (1) 4M x 36    (1) 1M x 36     (1) 4M x 36

     36MB          NONE       (1) 1M x 36    (1) 4M x 36     (1) 4M x 36

     36MB          NONE       (1) 4M x 36    (1) 4M x 36     (1) 1M x 36

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

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

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

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

     48MB          NONE       (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

     49MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36    (1) 256K x 36

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

     64MB          NONE          NONE           NONE        (1) 16M x 36

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

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

     65MB          NONE          NONE         (1) 256K x    (1) 16M x 36
                                                 36

     65MB          NONE          NONE        (1) 16M x 36   (1) 256K x 36

     66MB          NONE       (1) 16M x 36      NONE        (1) 512K x 36

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     66MB          NONE        (1) 256K x     (1) 256K x    (1) 16M x 36
                                   36             36

     66MB          NONE       (1) 16M x 36    (1) 256K x    (1) 256K x 36
                                                  36

     66MB          NONE        (1) 256K x    (1) 16M x 36   (1) 256K x 36
                                   36

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

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

     69MB          NONE       (1) 1M x 36     (1) 256K x    (1) 16M x 36
                                                  36

     69MB          NONE       (1) 16M x 36    (1) 256K x     (1) 1M x 36
                                                  36

     69MB          NONE        (1) 256K x    (1) 1M x 36    (1) 16M x 36
                                   36

     69MB          NONE       (1) 16M x 36   (1) 1M x 36    (1) 256K x 36

     69MB          NONE        (1) 256K x    (1) 16M x 36    (1) 1M x 36
                                   36

     69MB          NONE       (1) 1M x 36    (1) 16M x 36   (1) 256K x 36

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

     72MB          NONE       (1) 1M x 36    (1) 1M x 36    (1) 16M x 36

     72MB          NONE       (1) 16M x 36   (1) 1M x 36     (1) 1M x 36

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

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

     80MB          NONE       (1) 1M x 36    (1) 16M x 36    (1) 1M x 36

     81MB          NONE       (1) 16M x 36    (1) 256K x     (1) 4M x 36
                                                  36

     81MB          NONE        (1) 256K x    (1) 4M x 36    (1) 16M x 36
                                   36

     81MB          NONE        (1) 256K x    (1) 16M x 36    (1) 4M x 36
                                   36

     81MB          NONE       (1) 4M x 36    (1) 16M x 36   (1) 256K x 36

     84MB          NONE       (1) 4M x 36    (1) 1M x 36    (1) 16M x 36

     84MB          NONE       (1) 16M x 36   (1) 1M x 36     (1) 4M x 36

     84MB          NONE       (1) 1M x 36    (1) 4M x 36    (1) 16M x 36

     84MB          NONE       (1) 16M x 36   (1) 4M x 36     (1) 1M x 36

     84MB          NONE       (1) 1M x 36    (1) 16M x 36    (1) 4M x 36

     84MB          NONE       (1) 4M x 36    (1) 16M x 36    (1) 1M x 36

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

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

     96MB          NONE       (1) 4M x 36    (1) 4M x 36    (1) 16M x 36

     96MB          NONE       (1) 16M x 36   (1) 4M x 36     (1) 4M x 36

     96MB          NONE       (1) 4M x 36    (1) 16M x 36    (1) 4M x 36

     97MB        (1) 16M x    (1) 4M x 36    (1) 4M x 36    (1) 256K x 36
                    36

     100MB       (1) 16M x    (1) 4M x 36    (1) 4M x 36     (1) 1M x 36
                    36

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

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

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

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

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

       128KB           (4) 32K x 8          NONE           (1) 8K x 8 or
                                                           (1) 32K x 8

       256KB           (4) 32K x 8       (4) 32K x 8       (1) 32K x 8

                  CACHE JUMPER CONFIGURATION

        Size                 JP3                  JP4

        128KB          pins 2 & 3 closed   pins 2 & 3 closed

        256KB          pins 1 & 2 closed   pins 1 & 2 closed

                          CPU TYPE CONFIGURATION

      Type          JP8        JP16       JP17        JP18        JP19

      CX M6        5 & 6       Open       Open       Closed       Open

    SL80486SX      1 & 2      Closed     Closed       Open       Closed

     80486SX        Open      Closed     Closed       Open        Open

      CX M7        5 & 6      Closed      Open       Closed       Open

   AM486DXLV-S     3 & 4      Closed     Closed       Open        Open

    SL80486DX      1 & 2      Closed     Closed       Open       Closed

     80486DX        Open      Closed     Closed       Open        Open

    80486DX2        Open      Closed     Closed       Open        Open

     Pentium       1 & 2      Closed     Closed       Open        Open
    Overdrive

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

       Type           JP21       JP22       JP23       JP24       JP25

       CX M6          1 & 2      Open      2 & 3      1 & 2       1 & 2

     SL80486SX        1 & 2      Open      1 & 2      2 & 3       1 & 2

      80486SX         1 & 2      Open      2 & 3       Open       1 & 2

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

    AM486DXLV-S       2 & 3      2 & 3     2 & 3       Open       1 & 2

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

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

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

      Pentium         2 & 3      1 & 2     1 & 2      2 & 3       2 & 3
     Overdrive

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

       Type           JP27        JP28        JP29       JP30      JP31

      CX M6          Closed       Open       Closed     4 & 5     4 & 5

    SL80486SX         Open        Open        Open      1 & 2     1 & 2

     80486SX          Open        Open       Closed      Open      Open

      CX M7          Closed       Open       Closed     4 & 5     4 & 5

   AM486DXLV-S        Open        Open        Open      2 & 3     2 & 3

    SL80486DX         Open        Open        Open      1 & 2     1 & 2

     80486DX          Open        Open       Closed      Open      Open

     80486DX2         Open        Open       Closed      Open      Open

      Pentium         Open       Closed       Open      1 & 2     1 & 2
    Overdrive

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

                Type                                 JP40

                80486                 pins 1 & 2 closed, pins 3 & 4 open

  Note: The location of JP40 is unidentified.

                          CPU SPEED CONFIGURATION

    Speed          JP7             JP26          JP35           JP36

    25MHz      pins 1 & 2, 5    pins 1 & 2     pins 1 & 2     pins 1 & 2
                & 6 closed        closed        closed         closed

    33MHz      pins 3 & 4, 5    pins 1 & 2     pins 1 & 2     pins 1 & 2
                & 6 closed        closed        closed         closed

    40MHz      pins 1 & 2, 3    pins 2 & 3     pins 2 & 3     pins 2 & 3
                & 4 closed        closed        closed         closed

   50iMHz      pins 1 & 2, 5    pins 1 & 2     pins 1 & 2     pins 1 & 2
                & 6 closed        closed        closed         closed

    50MHz      pins 1 & 2, 5    pins 2 & 3     pins 2 & 3     pins 2 & 3
                & 6 closed        closed        closed         closed

   66iMHz      pins 3 & 4, 5    pins 1 & 2     pins 1 & 2     pins 1 & 2
                & 6 closed        closed        closed         closed

         VESA WAIT STATE CONFIGURATION

      Wait states                 JP40

     0 wait states          pins 5 & 6 open

      1 wait state         pins 5 & 6 closed

  Note: The location of JP40 is unidentified.

            BUS SPEED CONFIGURATION

       CPU speed                  JP40

        <= 33MHz            pins 7 & 8 open

        > 33MHz            pins 7 & 8 closed

  Note: The location of JP40 is unidentified.

