
ACHME COMPUTER, INC.

MS-4137 (VLB 486 AL5)

Processor  80486SX/CX486M7/AMD486DXL/80486DX/80486DX2/Pentium Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   ALI
Max.       64MB
Onboard
DRAM
Cache      128/256KB
BIOS       AMI
Dimensions 254mm x 220mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  External battery          JB         Reset switch           JFP (pins
                                                               19-20)

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

  Speaker                JFP (pins     Green PC connector        JG2
                           7-10)

  Green PC connector     JFP (pins     Green PC connector        JG3
                           9-10)

  Turbo LED              JFP (pins     32-bit VESA local      SL1 - SL3
                          12-13)       bus slots

  Turbo switch           JFP (pins
                          15-17)

  Note: If speaker is installed, JFP (pins 9-10) are not used.

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Battery type select internal             JB           pins 2 & 3
                                                              closed

      Battery type select external             JB             Closed

     CPU type select Intel/AMD               JC1           pins 1 & 2
                                                              closed

      CPU type select Cyrix                   JC1           pins 2 & 3
                                                              closed

     Factory configured - do not             JC2              Open
      alter

     Factory configured - do not             JC3              Open
      alter

     Factory configured - do not             JC9              Open
      alter

     CPU type select P24C not                JK5             Closed
      installed

      CPU type select P24C installed          JK5              Open

     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         Bank 3

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

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

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

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

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

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

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

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

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

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

     7MB        (1) 512K x     (1) 256K x    (1) 1M x 36        NONE
                    36             36

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

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

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

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

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

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

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

     10MB      (1) 2M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

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

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

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

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

     13MB      (1) 2M x 36     (1) 256K x    (1) 1M x 36        NONE
                                   36

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

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

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

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

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

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

     18MB      (1) 4M x 36     (1) 512K x        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

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

     19MB       (1) 512K x     (1) 256K x    (1) 4M x 36        NONE
                    36             36

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

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

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

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

     22MB       (1) 512K x    (1) 1M x 36    (1) 4M x 36        NONE
                    36

     22MB       (1) 512K x    (1) 1M x 36    (1) 4M x 36        NONE
                    36

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

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

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

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

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

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

     25MB      (1) 2M x 36     (1) 256K x    (1) 4M x 36        NONE
                                   36

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

     28MB      (1) 2M x 36    (1) 1M x 36    (1) 4M x 36        NONE

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

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

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

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

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

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

     34MB      (1) 8M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

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

     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

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

     37MB      (1) 8M x 36     (1) 256K x    (1) 1M x 36        NONE
                                   36

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

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

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

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

     49MB       (1) 8M x 36    (1) 256K x     (1) 4M x 36       NONE
                                   36

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

     52MB       (1) 8M x 36   (1) 1M x 36     (1) 4M x 36       NONE

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

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

                            CACHE CONFIGURATION

       Size             Bank 0           Bank 1               TAG

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

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

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

                          CPU TYPE CONFIGURATION

           Type                 JC4            JC5             JC6

          80486SX              2 & 3          4 & 5            Open

         SL80486SX             2 & 3          5 & 6       JC5 pin1 & JC6
                                                               pin1

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

          CX486M7           1 & 2, 3 & 4    2 & 3, 5 &     3 & 4, 5 & 6
                                                6

         AMD486DXL          1 & 2, 3 & 4      4 & 5           3 & 4

     SL80486DX/DX2/DX4      1 & 2, 3 & 4      5 & 6       3 & 4, JC5 pin1
                                                            & JC6 pin1

     Pentium Overdrive      1 & 2, 3 & 4      5 & 6       2 & 3, JC5 pin1
                                                            & JC6 pin1

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

             Type                       JC7                    JC8

           80486SX                      Open            pins 4 & 5 closed

          SL80486SX                    5 & 6              JC7 pin1 & JC8
                                                              pin1

         80486DX/DX2                    Open                  4 & 5

           CX486M7                  2 & 3, 4 & 5              4 & 5

          AMD486DXL             JC6 pin1 & JC7 pin1,          4 & 5
                                JC6 pin5 & JC7 pin5

      SL80486DX/DX2/DX4                5 & 6            4 & 5, JC7 pin1 &
                                                            JC8 pin1

      Pentium Overdrive                5 & 6            4 & 5, JC7 pin1 &
                                                            JC8 pin1

  Note: Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

     Speed           JK1         JK2          JK3             JK4

     25MHz          1 & 2       2 & 3        2 & 3      1 & 6, 4 & 9, 5 &
                                                               10

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

     40MHz          2 & 3       4 & 5        2 & 3       2 & 7, 5 & 10

     50iMHz         1 & 2       2 & 3        2 & 3      1 & 6, 4 & 9, 5 &
                                                               10

     50MHz          2 & 3       1 & 2        1 & 2        1 & 6, 4 & 9

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

     75iMHz         1 & 2       2 & 3        2 & 3      1 & 6, 4 & 9, 5 &
                                                               10

    100iMHz         1 & 2       2 & 3        2 & 3      1 & 6, 2 & 7, 3 &
                                                        8, 4 & 9, 5 & 10

  Note: Pins designated should be in the closed position.

                           VOLTAGE CONFIGURATION

              Voltage                                J50

                3.3v                   pins 1 & 2, 3 & 4, 5 & 6 closed

                 5v                    pins 7 & 8, 9 & 10 11 & 12closed

  Note: The mainboard can only support 5v when a 3.3v regulator is not
  installed.

