
UNIDENTIFIED

MB-4D50AG

Processor   CXM6/80486SX/CXM7/80486DX/80486DX2/P4S/P23S/P24S/Pentium
            Overdrive
Processor   20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set    ALI
Max. Onboard128MB
DRAM
Cache       64/128/256/512KB
BIOS        Unidentified
Dimensions  250mm x 220mm
I/O Options 32-bit VESA local bus slots (2), 32-bit PCI slots (3), green
            PC connector
NPU Options None

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  External battery          J1        Green PC connector          JP6
                                      (monitor)

  Speaker                   J2        Green PC connector         JP40

  Power LED & keylock       J3        Green PC connector         JP41

  Turbo switch              J4        32-bit VESA local bus    SL1 & SL2
                                      slots

  Turbo LED                 J5        32-bit PCI slots         PC1 - PC3

  Reset switch              J6

  Note: The location of JP6 is unidentified.

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             JP37             N/A
      alter

     CMOS memory normal operation            JP38          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP38          pins 2 & 3
                                                              closed

     Monitor type select color               JP39          pins 2 & 3
                                                              closed

      Monitor type select monochrome          JP39          pins 1 & 2
                                                              closed

     Factory configured - do not             JP42             N/A
      alter

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

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

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

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

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

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

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

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

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

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

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

     7MB        (1) 256K x     (1) 256K x     (1) 256K x     (1) 1M x 36
                    36             36             36

     7MB        (1) 256K x     (1) 256K x    (1) 1M x 36    (1) 256K x 36
                    36             36

     7MB        (1) 256K x    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                    36                            36

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

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

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

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

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

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

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

     10MB       (1) 256K x     (1) 256K x    (1) 1M x 36     (1) 1M x 36
                    36             36

     10MB       (1) 256K x    (1) 1M x 36     (1) 256K x     (1) 1M x 36
                    36                            36

     10MB       (1) 256K x    (1) 1M x 36    (1) 1M x 36    (1) 256K x 36
                    36

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

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

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

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

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

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

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

     19MB       (1) 256K x     (1) 256K x     (1) 256K x     (1) 4M x 36
                    36             36             36

     19MB       (1) 256K x     (1) 256K x    (1) 4M x 36    (1) 256K x 36
                    36             36

     19MB       (1) 256K x    (1) 4M x 36     (1) 256K x    (1) 256K x 36
                    36                            36

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

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

     20MB       (1) 512K x     (1) 512K x    (1) 2M x 36     (1) 2M x 36
                    36             36

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

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

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

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

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

     22MB       (1) 256K x     (1) 256K x    (1) 1M x 36     (1) 4M x 36
                    36             36

     22MB       (1) 256K x     (1) 256K x    (1) 4M x 36     (1) 1M x 36
                    36             36

     22MB       (1) 256K x    (1) 1M x 36     (1) 256K x     (1) 4M x 36
                    36                            36

     22MB       (1) 256K x    (1) 1M x 36    (1) 4M x 36    (1) 256K x 36
                    36

     22MB       (1) 256K x    (1) 4M x 36     (1) 256K x     (1) 1M x 36
                    36                            36

     22MB       (1) 256K x    (1) 4M x 36    (1) 1M x 36    (1) 256K x 36
                    36

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

     34MB       (1) 256K x     (1) 256K x    (1) 4M x 36     (1) 4M x 36
                    36             36

     34MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36    (1) 256K x 36
                    36

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

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

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

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

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

     37MB         (1) 256K x    (1) 4M x 36    (1) 1M x 36   (1) 4M x 36
                     36

     37MB         (1) 256K x    (1) 4M x 36    (1) 4M x 36   (1) 1M x 36
                     36

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

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

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

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

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

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

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

     68MB         (1) 512K x     (1) 512K x    (1) 8M x 36   (1) 8M x 36
                     36             36

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

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

      64KB        (4) 8K x 8      (4) 8K x 8      (1) 8K x 8

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

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

     512KB       (4) 128K x 8        NONE        (1) 32K x 8

                CACHE JUMPER CONFIGURATION

   Size      JP1       JP2       JP3       JP4      JP5

   64KB     1 & 2     2 & 3     1 & 2     1 & 2    1 & 2

  128KB     2 & 3     1 & 2     2 & 3     1 & 2    1 & 2

  256KB     2 & 3     4 & 5     2 & 3     2 & 3    1 & 2

  512KB     2 & 3     1 & 2     2 & 3     2 & 3    2 & 3

  Note: Pins designated should be closed position.

                          CPU TYPE CONFIGURATION

    Type        JP15      JP16      JP17     JP18       JP19       JP20

    CX M6       Open      Open      1 & 2    Open      Closed      Open

   80486SX      Open      Open      1 & 2   Closed      Open       Open

    CX M7      Closed     Open      1 & 2    Open      Closed     Closed

  AM486DXL     Closed     Open      1 & 2   Closed      Open       Open

   80486DX     Closed     Open      1 & 2   Closed      Open       Open

  80486DX2     Closed     Open      1 & 2   Closed      Open       Open

    P23S       Closed    Closed     1 & 2   Closed      Open       Open

     P4S       Closed    Closed     1 & 2   Closed      Open       Open

    P24S       Closed    Closed     1 & 2   Closed      Open       Open

    P24T       Closed     Open      2 & 3   Closed      Open      Closed

  Note: Pins designated should be in the closed position. The location of
  JP15 & JP16 are unidentified.

                      CPU TYPE CONFIGURATION (CONT)

    Type       JP21      JP22      JP23       JP24      JP25       JP26

   CX M6      1 & 2      2 & 3     4 & 5      Open      1 & 2     4 & 5

  80486SX     1 & 2      1 & 2     2 & 4      Open      Open      2 & 4

   CX M7      2 & 3      2 & 3     4 & 5      Open      1 & 2     4 & 5

  AM486DXL    2 & 3      2 & 3     1 & 2     2 & 3      Open      1 & 2

  80486DX     2 & 3      1 & 2     2 & 4     2 & 3      Open      2 & 4

  80486DX2    2 & 3      1 & 2     2 & 4     2 & 3      Open      2 & 4

    P23S      2 & 3      2 & 3     2 & 3     2 & 3      2 & 3     2 & 3

    P4S       2 & 3      2 & 3     2 & 3     2 & 3      2 & 3     2 & 3

    P24S      1 & 2      2 & 3     2 & 3      Open      2 & 3     2 & 3

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

  Note: Pins designated should be in the closed position.

                    CPU TYPE CONFIGURATION (BIOS SETUP)

       Type               JP7                JP8               JP9

       CX M6           pins 2 & 3         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

      80486SX          pins 1 & 2         pins 1 & 2        pins 2 & 3
                         closed            closed             closed

       CX M7           pins 2 & 3         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

     AM486DXL          pins 1 & 2         pins 2 & 3        pins 1 & 2
                         closed            closed             closed

      80486DX          pins 1 & 2         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

     80486DX2          pins 1 & 2         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

                  CPU TYPE CONFIGURATION (CHIPSET SETUP)

      Type           JP27           JP29          JP30           JP47

   CX M6 (1x)     pins 2 & 3     pins 2 & 3     pins 1 & 2       Open
                    closed         closed        closed

   CX M6 (2x)     pins 2 & 3     pins 2 & 3     pins 1 & 2      Closed
                    closed         closed        closed

    80486SX       pins 1 & 2     pins 1 & 2     pins 1 & 2        N/A
                    closed         closed        closed

   CX M7 (1x)     pins 1 & 2     pins 2 & 3     pins 1 & 2       Open
                    closed         closed        closed

   CX M7 (2x)     pins 1 & 2     pins 2 & 3     pins 1 & 2      Closed
                    closed         closed        closed

    AM486DXL      pins 1 & 2     pins 1 & 2     pins 1 & 2        N/A
                    closed         closed        closed

    80486DX       pins 1 & 2     pins 1 & 2     pins 1 & 2        N/A
                    closed         closed        closed

    80486DX2      pins 1 & 2     pins 1 & 2     pins 1 & 2        N/A
                    closed         closed        closed

                  CPU SPEED CONFIGURATION

  Speed      JP10      JP11       JP12      JP13      JP28

  20MHz      2 & 3     2 & 3     2 & 3     1 & 2     1 & 2

  25MHz      2 & 3     2 & 3     1 & 2     2 & 3     1 & 2

  33MHz      2 & 3     1 & 2     2 & 3     2 & 3     1 & 2

  40MHz      2 & 3     2 & 3     2 & 3     1 & 2     2 & 3

  50iMHz     2 & 3     2 & 3     1 & 2     2 & 3     1 & 2

  50MHz      2 & 3     2 & 3     1 & 2     2 & 3     2 & 3

  66iMHz     2 & 3     1 & 2     2 & 3     2 & 3     1 & 2

  Note: Pins designated should be in the closed position.

              CPU SPEED CONFIGURATION (CONT)

  Speed      JP31      JP32       JP33      JP34      JP35

  20MHz      1 & 2     1 & 2     1 & 2     1 & 2     2 & 3

  25MHz      1 & 2     1 & 2     1 & 2     1 & 2     2 & 3

  33MHz      1 & 2     1 & 2     1 & 2     1 & 2     2 & 3

  40MHz      1 & 2     2 & 3     2 & 3     1 & 2     1 & 2

  50iMHz     1 & 2     1 & 2     1 & 2     1 & 2     2 & 3

  50MHz      1 & 2     2 & 3     2 & 3     1 & 2     1 & 2

  66iMHz     1 & 2     1 & 2     1 & 2     1 & 2     2 & 3

  Note: Pins designated should be in the closed position.

      VESA WAIT STATE CONFIGURATION

     Wait states             JP46

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

         BUS SPEED CONFIGURATION

      CPU speed              JP45

      <= 33MHz        pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

                      BIOS CONFIGURATION

        Type                 JP36                 JP43

        EPROM          pins 1 & 2 closed          Open

      Flash ROM        pins 2 & 3 closed         Closed

      PCI IRQ CONFIGURATION (INT A)

         IRQ                 JP14

        IRQ5          pins 1 & 2 closed

        IRQ9          pins 3 & 4 closed

        IRQ10         pins 5 & 6 closed

       PCI IRQ CONFIGURATION (INT B)

         IRQ                  JP14

        IRQ11           pins 7 & 8 closed

        IRQ12          pins 9 & 10 closed

        PCI IRQ CONFIGURATION (INT C)

          IRQ                   JP14

         IRQ14          pins 11 & 12 closed

         IRQ15          pins 13 & 14 closed

        PCI IRQ CONFIGURATION (INT D)

       Interrupt                JP14

         INT4J          pins 17 & 18 closed

