
ACHME COMPUTER, INC.

MS-4131G (VLB 486 AL2G)

Processor   80486SX/80487SX/CX486M7/AMD486DX/AMD486DXL/80486DX/80486DX2/
            Pentium Overdrive
Processor   20/25/33/40/50(internal)/50/66(internal)66MHz
Speed
Chip Set    ALI
Max.        64MB
Onboard
DRAM
Cache       128/256/512KB
BIOS        AMI/Award/Phoenix
Dimensions  260mm x 220mm
I/O Options 32-bit VESA local bus slots (3), green PC connector
NPU Options None

[Image]

                                CONNECTIONS

  Purpose              Location      Purpose                  Location

  External battery        JB         Reset switch           JFP pins 19 -
                                                                 20

  Power LED &          JFP pins 1    Green PC connector         JG1
  keylock                 -5         (monitor)

  Speaker             JFP pins 7 -   Green PC LED               JG2
                          10         connector

  Turbo LED           JFP pins 12    Green PC connector         JG3
                         - 13        (sleep mode)

  Turbo switch        JFP pins 15    32-bit VESA Local       SL1 - SL3
                         - 17        bus slots

                        USER CONFIGURABLE SETTINGS

               Function                     Jumper           Position

     On board battery installed              JB            pins 2 & 3
                                                              closed

      External battery installed              JB          pins 1 & 2, 3 &
                                                             4 closed

     PQFP CPU disabled                      JC4              Closed

      PQFP CPU enabled                       JC4               Open

     Factory configured - do not            JC6               N/A
      alter

     Monitor type select monochrome         JP1            pins 1 & 2
                                                              closed

      Monitor type select color              JP1            pins 2 & 3
                                                              closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         NONE            NONE

       1MB             NONE        (1) 256K x 36        NONE

       1MB             NONE             NONE        (1) 256K x 36

       2MB             NONE             NONE        (1) 512K x 36

       2MB             NONE        (1) 512K x 36        NONE

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

       2MB         (4) 256K x 9    (1) 256K x 36        NONE

       3MB         (4) 256K x 9    (1) 256K x 36    (1) 256K x 36

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

       4MB         (4) 256K x 9    (1) 256K x 36    (1) 512K x 36

       4MB          (4) 1M x 9          NONE            NONE

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

       4MB             NONE         (1) 1M x 36         NONE

       4MB             NONE             NONE         (1) 1M x 36

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

       5MB         (4) 256K x 9     (1) 1M x 36         NONE

       5MB          (4) 1M x 9     (1) 256K x 36        NONE

       6MB         (4) 256K x 9     (1) 1M x 36     (1) 256K x 36

       6MB         (4) 256K x 9    (1) 256K x 36     (1) 1M x 36

       6MB          (4) 1M x 9     (1) 256K x 36    (1) 256K x 36

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

       7MB         (4) 256K x 9     (1) 1M x 36     (1) 512K x 36

       7MB          (4) 1M x 9     (1) 256K x 36    (1) 512K x 36

       8MB             NONE             NONE         (1) 2M x 36

       8MB             NONE         (1) 2M x 36         NONE

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

       8MB          (4) 1M x 9      (1) 1M x 36         NONE

       9MB         (4) 256K x 9     (1) 1M x 36      (1) 1M x 36

       9MB          (4) 1M x 9     (1) 256K x 36     (1) 1M x 36

       9MB          (4) 1M x 9      (1) 1M x 36     (1) 256K x 36

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

      10MB          (4) 1M x 9      (1) 1M x 36     (1) 512K x 36

      10MB         (4) 256K x 9    (1) 256K x 36     (1) 2M x 36

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

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

      12MB          (4) 1M x 9      (1) 1M x 36      (1) 1M x 36

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

      13MB          (4) 1M x 9     (1) 256K x 36     (1) 2M x 36

      13MB         (4) 256K x 9     (1) 1M x 36      (1) 2M x 36

      16MB             NONE             NONE         (1) 4M x 36

      16MB             NONE         (1) 4M x 36         NONE

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

      16MB          (4) 1M x 9      (1) 1M x 36      (1) 2M x 36

      17MB         (4) 256K x 9     (1) 4M x 36         NONE

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

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

      18MB         (4) 256K x 9    (1) 256K x 36     (1) 4M x 36

      18MB         (4) 256K x 9     (1) 4M x 36     (1) 256K x 36

      19MB         (4) 256K x 9     (1) 4M x 36     (1) 512K x 36

      20MB          (4) 1M x 9      (1) 4M x 36         NONE

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

      21MB         (4) 256K x 9     (1) 1M x 36      (1) 4M x 36

      21MB          (4) 1M x 9     (1) 256K x 36     (1) 4M x 36

      21MB         (4) 256K x 9     (1) 4M x 36      (1) 1M x 36

      21MB          (4) 1M x 9      (1) 4M x 36     (1) 256K x 36

      21MB          (4) 4M x 9     (1) 256K x 36     (1) 1M x 36

      21MB          (4) 1M x 9     (1) 256K x 36     (1) 8M x 36

      22MB          (4) 1M x 9      (1) 4M x 36     (1) 512K x 36

      24MB          (4) 4M x 9      (1) 1M x 36      (1) 1M x 36

      24MB          (4) 1M x 9      (1) 4M x 36      (1) 1M x 36

      24MB          (4) 1M x 9      (1) 1M x 36      (1) 4M x 36

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

      25MB         (4) 256K x 9     (1) 4M x 36      (1) 2M x 36

      25MB          (4) 4M x 9     (1) 256K x 36     (1) 2M x 36

      28MB          (4) 1M x 9      (1) 4M x 36      (1) 2M x 36

      28MB          (4) 4M x 9      (1) 1M x 36      (1) 2M x 36

      32MB          (4) 4M x 9          NONE         (1) 4M x 36

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

      32MB             NONE         (1) 8M x 36         NONE

      32MB             NONE             NONE         (1) 8M x 36

      32MB          (4) 4M x 9      (1) 4M x 36         NONE

      33MB          (4) 4M x 9      (1) 4M x 36     (1) 256K x 36

      33MB          (4) 4M x 9     (1) 256K x 36     (1) 4M x 36

      33MB         (4) 256K x 9     (1) 4M x 36      (1) 4M x 36

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

      33MB          (4) 4M x 9     (1) 256K x 36     (1) 4M x 36

      34MB          (4) 4M x 9     (1) 256K x 36    (1) 256K x 36

      34MB          (4) 4M x 9      (1) 4M x 36     (1) 512K x 36

                    DRAM CONFIGURATION (CONT)

      Size            Bank 0           Bank 1          Bank 2

      34MB         (4) 256K x 9    (1) 256K x 36     (1) 8M x 36

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

      36MB          (4) 1M x 9      (1) 4M x 36      (1) 4M x 36

      36MB          (4) 4M x 9      (1) 1M x 36      (1) 4M x 36

      36MB          (4) 4M x 9      (1) 4M x 36      (1) 1M x 36

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

      37MB         (4) 256K x 9     (1) 1M x 36      (1) 8M x 36

      37MB         (4) 256K x 9     (1) 1M x 36      (1) 8M x 36

      37MB          (4) 4M x 9      (1) 1M x 36     (1) 256K x 36

      40MB          (4) 1M x 9      (1) 1M x 36      (1) 8M x 36

      40MB          (4) 4M x 9      (1) 4M x 36      (1) 2M x 36

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

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

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

      49MB         (4) 256K x 9     (1) 4M x 36      (1) 8M x 36

      49MB          (4) 4M x 9     (1) 256K x 36     (1) 8M x 36

      52MB          (4) 1M x 9      (1) 4M x 36      (1) 8M x 36

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

      64MB          (4) 4M x 9      (1) 4M x 36      (1) 8M x 36

                            CACHE CONFIGURATION

      Size           Bank 0           Bank 1                TAG

     128KB         (4) 32K x 8         NONE         (1) 8K x 8 or (1) 16K
                                                     x 8 or (1) 32K x 8

     256KB         (4) 32K x 8      (4) 32K x 8    (1) 16K x 8 or (1) 32K
                                                            x 8

     256KB         (4) 64K x 8         NONE        (1) 16K x 8 or (1) 32K
                                                            x 8

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

                        CACHE JUMPER CONFIGURATION

      Size               JS1               JS2                 JS3

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

      256KB           pins 1 & 2        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

      256KB           pins 2 & 3        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

      512KB           pins 2 & 3        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

                          CPU TYPE CONFIGURATION

            Type                       JC1                    JC2

          CX486 M7             2A & 3A, 1B & 2B, 1C      1 & 2, 3 & 4
                                      & 2C

           80486SX             1A & 2A, 1B & 2B, 1C          2 & 3
                                      & 2C

         SL 80486SX            1A & 2A, 1B & 2B, 1C          2 & 3
                                      & 2C

           80487SX             1A & 2A, 1B & 2B, 1C      1 & 2, 3 & 4
                                      & 2C

        AMD486DX/DXL           1A & 2A, 1B & 2B, 1C      1 & 2, 3 & 4
                                      & 2C

         80486DX/DX2           1A & 2A, 1B & 2B, 1C      1 & 2, 3 & 4
                                      & 2C

       SL 80486DX/DX2          1A & 2A, 1B & 2B, 1C      1 & 2, 3 & 4
                                      & 2C

      Pentium Overdrive        1A & 2A, 2B & 3B, 1C      1 & 2, 3 & 4
                                      & 2C

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

         Type                          JC3                       JC5

       CX486 M7          2A & 3A, 4A & 5A, 3B & 4B, 5B &        1 & 2
                              6B, 3C & 4C, 5C & 6C

        80486SX                      4C & 5C                    1 & 2

      SL 80486SX         1A & 2A, 5A & 6A, 4C & 4D, 5C &        1 & 2
                                       6C

        80487SX                 2B & 3B, 4C & 5C                1 & 2

     AMD486DX/DXL        2A & 2B, 3B & 4B, 5A & 5B, 4C &        1 & 2
                                       5C

      80486DX/DX2               3B & 4B, 4C & 5C                1 & 2

    SL 80486DX/DX2       1A & 2A, 3B & 4B, 4C & 4D, 5A &        1 & 2
                                   6A, 5C & 6C

   Pentium Overdrive      1A & 2A, 5A &6A, 2B & 3B, 5C &        2 & 3
                                       6C

  Note: Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

       Speed                    JK1                 JK2           JK3

       25MHz           1 & 2, 7 & 9, 8 & 10,       2 & 3         1 & 2
                              14 & 16

       33MHz           1 & 2, 3 & 4, 5 & 6, 7      2 & 3         1 & 2
                       & 9, 8 & 10, 14 & 16

       40MHz          3 & 4, 10 & 12, 14 & 16      1 & 2         2 & 3

      AMD40MHz        3 & 4, 10 & 12, 14 & 16      4 & 5         2 & 3

       50iMHz          1 & 2, 7 & 9, 8 & 10,       2 & 3         1 & 2
                              14 & 16

       50MHz           1 & 2, 7 & 9, 10 & 12       1 & 2         2 & 3

       66iMHz          1 & 2, 3 & 4, 5 & 6, 7      2 & 3         1 & 2
                       & 9, 8 & 10, 14 & 16

  Note: Pins designated should be in the closed position.

         BUS SPEED CONFIGURATION

      CPU speed              JP2

       <=33MHz        pins 1 & 2 closed

       >33MHz         pins 2 & 3 closed

      VESA WAIT STATE CONFIGURATION

     Wait states             JP3

    0 wait states      pins 1 & 2 open

    1 wait state      pins 1 & 2 closed

