
SOYO COMPUTER CO., LTD.

486VESA VER. 4.2

Processor  CX486M6/CX486M7/80486SX/80486DX/80486DX280486DX4/P24D/Pentium
           Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       128MB
Onboard
DRAM
Cache      64/128/256KB
BIOS       Award
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

  Power LED & keylock       J17       Turbo LED                   J22

  Speaker                   J18       Green PC connector          JP4

  Reset switch              J19       Green PC connector          JP6

  External battery          J20       Green PC connector          JP7

  Turbo switch              J21       32-bit VESA local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome          JP3              Open

      Monitor type select color               JP3             Closed

     CMOS memory normal operation            JP5           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP5           pins 2 & 3
                                                              closed

     Factory configured - do not             JP17          pins 1 & 2
      alter                                                   closed

     Factory configured - do not             JP27            Closed
      alter

                DRAM CONFIGURATION (SETTING 1)

      Size          Bank 0          Bank 1          Bank 2

      1MB        (4) 256K x 9        NONE            NONE

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

      4MB         (4) 1M x 9         NONE            NONE

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

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

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

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

      16MB        (4) 4M x 9         NONE            NONE

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

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

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

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

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

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

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

      64MB        (4) 16M x 9        NONE            NONE

      65MB       (4) 256K x 9    (1) 16M x 36        NONE

      68MB        (4) 1M x 9     (1) 16M x 36        NONE

      72MB        (4) 1M x 9      (1) 1M x 36    (1) 16M x 36

      80MB        (4) 4M x 9     (1) 16M x 36        NONE

      96MB        (4) 4M x 9      (1) 4M x 36    (1) 16M x 36

     128MB        (4) 16M x 9    (1) 16M x 36        NONE

                  DRAM CONFIGURATION (SETTING 2)

      Size            Bank 0           Bank 1          Bank 2

       1MB        (1) 256K x 36         NONE            NONE

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

       2MB        (1) 512K x 36         NONE            NONE

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

       4MB         (1) 1M x 36          NONE            NONE

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

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

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

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

               DRAM CONFIGURATION (SETTING 2 CONT)

      Size            Bank 0           Bank 1          Bank 2

       8MB         (1) 2M x 36          NONE            NONE

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

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

      16MB         (1) 4M x 36          NONE            NONE

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

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

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

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

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

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

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

      32MB         (1) 8M x 36          NONE            NONE

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

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

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

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

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

      64MB         (1) 16M x 36         NONE            NONE

      65MB        (1) 256K x 36     (1) 16M x 36        NONE

      68MB         (1) 1M x 36      (1) 16M x 36        NONE

      72MB         (1) 1M x 36      (1) 1M x 36      (4) 16M x 9

      80MB         (1) 4M x 36      (1) 16M x 36        NONE

      96MB         (1) 4M x 36      (1) 4M x 36      (4) 16M x 9

      128MB        (1) 16M x 36     (1) 16M x 36        NONE

                         DRAM JUMPER CONFIGURATION

     Setting             JP35               JP36               JP37

        1              pins 1 & 2        pins 1 & 2         pins 1 & 2
                        closed             closed             closed

        2              pins 2 & 3        pins 2 & 3         pins 2 & 3
                        closed             closed             closed

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

       64KB            (4) 8K x 8        (4) 8K x 8        (1) 8K x 8

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

                        CACHE JUMPER CONFIGURATION

      Size               JP9               JP10               JP13

      64KB            pins 2 & 3        pins 2 & 3      pins 1 & 2 closed
                       closed             closed

      128KB           pins 2 & 3        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

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

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

                          CPU TYPE CONFIGURATION

     Type        JP1      JP2      JP12      JP14      JP15       JP16

  CX486 (M6)    1 & 2    2 & 3    1 & 2     2 & 3      Open       Open

  CX486 (M7)    1 & 2    2 & 3    1 & 2     1 & 2,    2 & 3       Open
                                            3 & 4

   80486SX      2 & 3    1 & 2    2 & 3     2 & 3      Open       Open

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

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

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

   80486DX4     2 & 3    1 & 2    2 & 3     1 & 2,    2 & 3       Open
                                            3 & 4

     P24T       2 & 3    1 & 2    2 & 3     1 & 2,    1 & 2       Open
                                            3 & 4

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

    Type      JP18     JP19     JP20     JP21    JP22     JP23     JP111

    CX486     2 & 3    2 & 3    Open     Open    2 & 3    2 & 3    2 & 3
    (M6)

    CX486     2 & 3    2 & 3    Open     Open    2 & 3    2 & 3    2 & 3
    (M7)

   80486SX    2 & 3    4 & 5    Open     1 & 2   Open     Open     3 & 4

   80486DX    2 & 3    4 & 5    Open     1 & 2   Open     Open     3 & 4

  80486DX2    2 & 3    4 & 5    Open     1 & 2   Open     Open     3 & 4

    P24D      1 & 2    4 & 5   Closed    2 & 3   1 & 2    Open     1 & 2,
                                                                   3 & 4

  80486DX4    2 & 3    Open     Open     1 & 2   Open     Open     3 & 4

    P24T      1 & 2    1 & 2    Open     Open    1 & 2    1 & 2    3 & 4

  Note: Pins designated should be in the closed position.

               CPU SPEED CONFIGURATION

   Speed      JP29       JP30      JP31       JP34

   25MHz     Closed      Open     Closed     Closed

   33MHz      Open      Closed    Closed     Closed

   40MHz     Closed      Open      Open      Closed

  50iMHz     Closed      Open     Closed     Closed

   50MHz      Open      Closed     Open      Closed

  66iMHz      Open      Closed    Closed     Closed

  75iMHz     Closed      Open     Closed      Open

  100iMHz     Open      Closed    Closed      Open

               CPU VOLTAGE CONFIGURATION

          Voltage                      JP24

            3.3v             pins 1 & 2, 4 & 5 closed

            5.0v             pins 2 & 3, 5 & 6 closed

