
SOYO COMPUTER CO., LTD.

486VESA (VER. 2.2)

Processor  CX486M6/CX486M7/80486SX/80486DX/80486DX2/80486DX4/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          pins 1 & 2
      alter                                                   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) 2M x 36    (1) 2M x 36       NONE            NONE

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

     20MB       (1) 1M x 36    (1) 4M x 36       NONE            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) 2M x 36    (1) 2M x 36

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

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

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

     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

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

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

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

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

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

     48MB        (1) 2M x 36    (1) 2M x 36    (1) 8M 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

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

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

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

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

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

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

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

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

     96MB        (1) 4M x 36    (1) 4M x 36     (1) 16M x        NONE
                                                   36

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

       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           Open         pins 1 & 2 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     JP11     JP12     JP14    JP15       JP16

   CX486M6     1 &     2 &    2 & 3    1 & 2   2 & 3    Open       Open
                2      3

   CX486M7     1 &     2 &    2 & 3    1 & 2   1 & 2,   3 & 4      Open
                2      3                       3 & 4

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

    Type      JP18    JP19      JP20      JP21    JP22     JP23     JP32

  CX486M6     2 & 3   2 & 3     Open      Open    2 & 3    2 & 3   2 & 3

  CX486M7     2 & 3   2 & 3     Open      Open    2 & 3    2 & 3   2 & 3

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

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

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

  80486DX4    2 & 3   4 & 5     Open      1 & 2   Open     Open    2 & 3

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

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

  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 2 & 3, 5 & 6 closed

            5.0v             pins 1 & 2, 4 & 5 closed

