
MICRO-STAR INTERNATIONAL CO., LTD.

MS-4143 (VER. 1.0)

Processor   80486SX/SL80486SX/AM486DX/80486DX/SL80486DX/CX486DX2/
            AM486DXL/AM486DX2/80486DX2/SL80486DX2/SL80486DX4/P24D
Processor   25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/
Speed       100(internal)MHz
Chip Set    ALI
Video Chip  None
Set
Maximum     64MB
Onboard
Memory
Maximum     None
Video
Memory
Cache       128/256/512KB
BIOS        AMI
Dimensions  270mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface, game interface,
            green PC connector, IDE interfaces (2), parallel port, serial
            ports (2)
NPU Options None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Serial port 1             CN1        Speaker               JFP/pins 7 -
                                                                 10

  Serial port 2             CN2        Turbo LED            JFP/pins 12 &
                                                                 13

  Parallel port             CN3        Reset switch         JFP/pins 19 &
                                                                 20

  Floppy drive              CN4        IDE interface LED    JFP/pins 21 &
  interface                                                      22

  IDE interface 2           CN5        Chassis fan power        JFAN

  IDE interface 1           CN6        Green PC connector        JG1
                                       (monitor)

  Game interface            CN7        Green PC LED              JG2

  External battery          JB1        Green PC connector        JG3

  Power LED &           JFP/pins 1 -   32-bit PCI slots       PC1 - PC3
  keylock                    5

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Battery type select internal          JB1        Pins 2 & 3 closed

      Battery type select external          JB1             Closed

     Factory configured - do not          JC10          Unidentified
      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) 256K x     (1) 256K x     (1) 256K x        None
                    36             36             36

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

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

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

     6MB        (1) 512K x     (1) 512K x     (1) 512K x        None
                    36             36             36

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

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

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

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

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

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

     16MB      (1) 2M 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

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

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

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

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

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

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

     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) 2M x 36    (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

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

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

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

     44MB       (1) 8M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     48MB       (1) 8M x 36    (1) 2M x 36    (1) 2M x 36       None

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

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

     64MB       (1) 16M x 36      None           None           None

                            CACHE CONFIGURATION

       Size             Bank 0            Bank 1              TAG

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

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

     256KB (B)        (4) 64K x 8          None         (1) 16K/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 (A)         Pins 1 & 2        Pins 1 & 2      Pins 2 & 3 closed
                       closed             closed

    256KB (B)         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 SPEED SELECTION

      Speed               JK1                JK2                JK3

      25MHz              Open             Pins 2 & 3           Open
                                           closed

      33MHz         Pins 1 & 2, 3 &       Pins 2 & 3           Open
                       4 closed            closed

      40MHz            Pins 1 & 2         Pins 1 & 2          Closed
                        closed             closed

      50iMHz             Open             Pins 2 & 3           Open
                                           closed

      66iMHz        Pins 1 & 2, 3 &       Pins 2 & 3           Open
                       4 closed            closed

      75iMHz             Open             Pins 2 & 3           Open
                                           closed

      80iMHz           Pins 1 & 2         Pins 1 & 2          Closed
                        closed             closed

     100iMHz        Pins 1 & 2, 3 &       Pins 2 & 3           Open
                       4 closed            closed

                            CPU TYPE SELECTION

      Type           JC1            JC2           JC3            JC4

    80486SX          Open          2 & 3          Open           Open

   SL80486SX         Open          2 & 3          Open          2 & 3

    AM486DX         2 & 3        1 & 2, 3 &       Open           Open
                                     4

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

   SL80486DX        2 & 3        1 & 2, 3 &       Open          2 & 3
                                     4

    CX486DX2        2 & 3        1 & 2, 3 &      4 & 5          4 & 5
                                     4

    AM486DXL        2 & 3        1 & 2, 3 &      1 & 2          1 & 2
                                     4

    AM486DX2        2 & 3        1 & 2, 3 &       Open           Open
                                     4

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

   SL80486DX2       2 & 3        1 & 2, 3 &       Open          2 & 3
                                     4

   SL80486DX4       2 & 3        1 & 2, 3 &       Open          2 & 3
                                     4

      P24D          2 & 3        1 & 2, 3 &      2 & 3          2 & 3
                                     4

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CONT)

       Type          JC5       JC6       JC7         JC8          JC9

     80486SX        1 & 2      Open     1 & 2       Open         Open

    SL80486SX       2 & 3     2 & 3     1 & 2      Closed        Open

     AM486DX        1 & 2      Open     1 & 2       Open         Open

     80486DX        1 & 2      Open     1 & 2       Open         Open

    SL80486DX       2 & 3     2 & 3     1 & 2      Closed        Open

     CX486DX2       4 & 5     4 & 5     2 & 3       Open        Closed

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

     AM486DX2       1 & 2      Open     1 & 2       Open         Open

     80486DX2       1 & 2      Open     1 & 2       Open         Open

    SL80486DX2      2 & 3     2 & 3     1 & 2      Closed        Open

    SL80486DX4      2 & 3     2 & 3     1 & 2      Closed        Open

       P24D         2 & 3     2 & 3     2 & 3,     Closed        Open
                                        4 & 5

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

         Voltage                      J4                      JP8

             3.45v          Pins 4 & 10, 5 & 11, 6           Open
                                 & 12 closed

             3.6v           Pins 4 & 10, 5 & 11, 6          Closed
                                 & 12 closed

             5v            Pins 1 & 7, 2 & 8, 3 &           Open
                                   9 closed

                           DMA CHANNEL SELECTION

    Channel          JP17          JP18           JP23           JP24

          1         Closed        Closed          Open           Open

         3          Open          Open          Closed         Closed

