
MECER CORPORATION

B815B (VER. B)

Processor        80386DX/CX486DLC/CX486M6/80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Unidentified
Max. Onboard DRAM128MB
Cache            128/256KB
BIOS             AMI
Dimensions       254mm x 218mm
I/O Options      None
NPU Options      80387DX

[Image]

                                CONNECTIONS

  Purpose                 Location      Purpose               Location

  Auxiliary keyboard        JP1         Turbo LED          JP27 pins 11 -
  connector                                                      12

  External battery          JP12        Turbo switch       JP27 pins 16 -
                                                                 17

  Power LED & keylock   JP27 pins 1 -   Reset switch       JP27 pins 19 -
                             5                                   20

  Speaker               JP27 pins 7 -
                             10

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome          JP10          pins 1 & 2
                                                              closed

      Monitor type select color               JP10          pins 2 & 3
                                                              closed

     Battery enabled                         JP13            Closed

      Battery disabled                        JP13             Open

     Factory configured - do not             JP17             N/A
      alter

     Factory configured - do not             JP18             N/A
      alter

     Factory configured - do not             JP21             N/A
      alter

     Factory configured - do not             JP22             N/A
      alter

     Factory configured - do not             JP28          pins 1 & 2
      alter                                                   closed

     Factory configured - do not             JP33          pins 2 & 3
      alter                                                   closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      17MB        (4) 256K x 9    (4) 4M x 9

      20MB        (4) 1M x 9      (4) 4M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

      64MB        (4) 16M x 9        NONE

      65MB        (4) 256K x 9   (4) 16M x 9

      68MB        (4) 1M x 9     (4) 16M x 9

      80MB        (4) 4M x 9     (4) 16M x 9

     128MB        (4) 16M x 9    (4) 16M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

                  CACHE JUMPER CONFIGURATION

        Size                 JP24                 JP25

        128KB                Open          pins 2 & 3 closed

        256KB               Closed         pins 1 & 2 closed

                          CPU TYPE CONFIGURATION

          Type               J1          JP2         JP3          JP4

   80386DX-40 (80MHz)      6 & 8        2 & 3       1 & 2        2 & 3

  CX486DLC-40 (80MHz)      6 & 8        2 & 3       2 & 3        2 & 3

   CX486M6-33 (33MHz)      5 & 7        2 & 3       2 & 3        1 & 2

   CX486M6-33 (66MHz)      1 & 2        2 & 3       2 & 3        1 & 2

   CX486M6-40 (40MHz)     1 & 2, 3      2 & 3       2 & 3        1 & 2
                            & 4

  CX486M6-33 (33MHz) C6    5 & 7        2 & 3       2 & 3        1 & 2

  CX486M6-33 (66MHz) C6    1 & 2        2 & 3       2 & 3        1 & 2

  CX486M6-40 (40MHz) C6   1 & 2, 3      2 & 3       2 & 3        1 & 2
                            & 4

   80486SX-25 (25MHz)     3 & 4, 5      1 & 2       2 & 3        2 & 3
                            & 7

   80486SX-25 (50MHz)      3 & 4        1 & 2       2 & 3        2 & 3

   80486SX-33 (33MHz)      5 & 7        1 & 2       2 & 3        2 & 3

   80486SX-33 (66MHz)      1 & 2        1 & 2       2 & 3        2 & 3

   80486DX-33 (33MHz)      5 & 7        1 & 2       2 & 3        2 & 3

   80486DX-33 (66MHz)      1 & 2        1 & 2       2 & 3        2 & 3

   80486DX-40 (40MHz)     1 & 2, 3      1 & 2       2 & 3        2 & 3
                            & 4

   80486DX-50 (50MHz)      3 & 4        1 & 2       2 & 3        2 & 3

  80486DX2-50 (25MHz)      3 & 4        1 & 2       2 & 3        2 & 3

  80486DX2-50 (50MHz)     3 & 4, 5      1 & 2       2 & 3        2 & 3
                            & 7

  80486DX2-66 (33MHz)      5 & 7        1 & 2       2 & 3        2 & 3

  80486DX2-66 (66MHz)      1 & 2        1 & 2       2 & 3        2 & 3

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

        Type            JP11       JP14      JP15       JP16       JP19

  80386DX-40 (80MHz)    1 & 2     1 & 2      1 & 2     2 & 3      2 & 3

     CX486DLC-40        1 & 2     2 & 3      1 & 2     2 & 3      2 & 3
       (80MHz)

  CX486M6-33 (33MHz)    2 & 3     2 & 3      Open      1 & 2      1 & 2

  CX486M6-33 (66MHz)    1 & 2     2 & 3      Open      1 & 2      2 & 3

  CX486M6-40 (40MHz)    2 & 3     2 & 3      Open      1 & 2      1 & 2

  CX486M6-33 (33MHz)    2 & 3     2 & 3      1 & 2     2 & 3      1 & 2
         C6

  CX486M6-33 (66MHz)    1 & 2     2 & 3      1 & 2     2 & 3      2 & 3
         C6

  CX486M6-40 (40MHz)    2 & 3     2 & 3      1 & 2     2 & 3      1 & 2
         C6

  80486SX-25 (25MHz)    2 & 3     2 & 3      Open      1 & 2      1 & 2

  80486SX-25 (50MHz)    1 & 2     2 & 3      Open      1 & 2      2 & 3

  80486SX-33 (33MHz)    2 & 3     2 & 3      Open      1 & 2      1 & 2

  80486SX-33 (66MHz)    1 & 2     2 & 3      Open      1 & 2      2 & 3

  80486DX-33 (33MHz)    2 & 3     2 & 3      1 & 2     2 & 3      1 & 2

  80486DX-33 (66MHz)    1 & 2     2 & 3      1 & 2     2 & 3      2 & 3

  80486DX-40 (40MHz)    2 & 3     2 & 3      1 & 2     2 & 3      1 & 2

  80486DX-50 (50MHz)    2 & 3     2 & 3      1 & 2     2 & 3      1 & 2

     80486DX2-50        2 & 3     2 & 3      1 & 2     2 & 3      1 & 2
       (25MHz)

     80486DX2-50        2 & 3     2 & 3      1 & 2     2 & 3      1 & 2
       (50MHz)

     80486DX2-66        2 & 3     2 & 3      1 & 2     2 & 3      1 & 2
       (33MHz)

     80486DX2-66        1 & 2     2 & 3      1 & 2     2 & 3      2 & 3
       (66MHz)

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

       Type           JP29       JP30       JP31       JP32       JP34

    80386DX-40        Open       Open      Closed     Closed      Open
     (80MHz)

    CX486DLC-40       Open       Open      Closed     Closed     Closed
     (80MHz)

    CX486M6-33       Closed     Closed      Open       Open       Open
     (33MHz)

    CX486M6-33       Closed     Closed      Open       Open       Open
     (66MHz)

    CX486M6-40       Closed     Closed      Open       Open       Open
     (40MHz)

    CX486M6-33        Open       Open      Closed     Closed      Open
    (33MHz) C6

    CX486M6-33        Open       Open      Closed     Closed      Open
    (66MHz) C6

    CX486M6-40        Open       Open      Closed     Closed      Open
    (40MHz) C6

    80486SX-25        Open       Open      Closed     Closed      Open
     (25MHz)

    80486SX-25        Open       Open      Closed     Closed      Open
     (50MHz)

    80486SX-33        Open       Open      Closed     Closed      Open
     (33MHz)

    80486SX-33        Open       Open      Closed     Closed      Open
     (66MHz)

    80486DX-33        Open       Open      Closed     Closed      Open
     (33MHz)

    80486DX-33        Open       Open      Closed     Closed      Open
     (66MHz)

    80486DX-40        Open       Open      Closed     Closed      Open
     (40MHz)

    80486DX-50        Open       Open      Closed     Closed      Open
     (50MHz)

    80486DX2-50       Open       Open      Closed     Closed      Open
     (25MHz)

    80486DX2-50       Open       Open      Closed     Closed      Open
     (50MHz)

    80486DX2-66       Open       Open      Closed     Closed      Open
     (33MHz)

    80486DX2-66       Open       Open      Closed     Closed      Open
     (66MHz)

