
ACHME COMPUTER, INC.

MS-4138

Processor   SL80486SX/80486SX/AM486DXL/CXM7/SL80486DX/80486DX/80486DX2/
            Pentium Overdrive
Processor   25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set    SIS
Max.        32MB
Onboard
DRAM
Cache       128/256/512KB
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

  External battery         JB         Reset switch          JFP pins 19 -
                                                                 20

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

  Speaker              JFP pins 6 -   Green PC LED               JG2
                           10

  Turbo LED           JFP pins 12 -   Green PC connector         JG3
                           13

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

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Battery type select internal             JB           pins 2 & 3
                                                              closed

      Battery type select external             JB             Closed

     Factory configured - do not             JC5              N/A
      alter

     Monitor type select monochrome          JP1              Open

      Monitor type select color               JP1             Closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2          Bank 3

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

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

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

     4MB         (1) 256K x     (1) 256K x     (1) 512K x        NONE
                    36             36             36

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

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

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

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

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

     8MB         (1) 256K x     (1) 256K x     (1) 512K x    (1) 1M x 36
                    36             36             36

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

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

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

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

     12MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 1M x 36
                    36             36

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

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

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

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

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

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

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

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

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

     20MB        (1) 512K x     (1) 512K x    (1) 4M x 36        NONE
                    36             36

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

     20MB       (1) 1M x 36    (1) 2M x 36    (1) 2M x 36        NONE

     24MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 4M x 36
                    36             36

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

     24MB       (1) 1M x 36    (1) 1M x 36    (1) 2M x 36    (1) 2M x 36

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

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

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

     32MB       (1) 2M x 36    (1) 2M x 36    (1) 4M x 36        NONE

     32MB       (1) 2M x 36    (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

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

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

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

     48MB        (1) 2M x 36    (1) 2M x 36    (1) 4M x 36   (1) 4M x 36

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

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

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

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36       NONE

     68MB        (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     72MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36   (1) 8M x 36

     80MB        (1) 2M x 36    (1) 2M x 36    (1) 8M x 36   (1) 8M x 36

     80MB        (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     96MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36   (1) 8M x 36

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

     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

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

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

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

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

                        CACHE JUMPER CONFIGURATION

      Size               JS1               JS2                 JS3

      128KB           pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

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

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

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

                          CPU TYPE CONFIGURATION

          Type                     JC1                      JC2

        SL80486SX          2 & 3, 7 & 8, 9 & 10,          10 & 11
                                 12 & 13

         80486SX                  7 & 8                   10 & 11

        AM486DXL              7 & 8, 11 & 12        5 & 6, 7 & 8, 9 & 10,
                                                          11 & 12

          CXM7              1 & 2, 3 & 12, 4 &     4 & 13, 7 & 8, 9 & 10,
                            11, 5 & 10, 7 & 8             11 & 12

        SL80486DX          2 & 3, 7 & 8, 9 & 10,   7 & 8, 9 & 10, 11 & 12
                                 12 & 13

         80486DX                  7 & 8            7 & 8, 9 & 10, 11 & 12

        80486DX2                  7 & 8            7 & 8, 9 & 10, 11 & 12

    Pentium Overdrive      2 & 3, 7 & 8, 9 & 10,   6 & 7, 9 & 10, 11 & 12
                                 12 & 13

  Note: Pins designated should be in the closed position.

                CPU TYPE CONFIGURATION (CONT)

        Type                  JC3                  JC4

      SL80486SX        pins 1 & 2 closed    pins 1 & 2 closed

       80486SX               Open           pins 1 & 2 closed

      AM486DXL         pins 2 & 3 closed    pins 3 & 4 closed

        CXM7           pins 1 & 2 closed    pins 3 & 4 closed

      SL80486DX        pins 1 & 2 closed    pins 1 & 2 closed

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

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

  Pentium Overdrive    pins 1 & 2 closed    pins 1 & 2 closed

                          CPU SPEED CONFIGURATION

         Speed                     JK1                      JK2

         25MHz                    Open               pins 2 & 3 closed

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

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

         50iMHz                   Open               pins 2 & 3 closed

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

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

  VESA WAIT STATE CONFIGURATION

   Wait states          JP2

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP3

   <= 33MHz        Open

   > 33MHz        Closed

