SOYO COMPUTER CO., LTD.

SY-024B1/B2

Processor            80386DX/CX486DLC/80486SX/80486DX/ODP486SX/80486DX2
Processor Speed      25/33/40/50(internal)/50/66(internal)MHz
Chip Set             OPTI
Max. Onboard DRAM    32MB
Cache                64/128/256KB
BIOS                 AMI
Dimensions           254mm x 218mm
I/O Options          None
NPU Options          80387

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J17      External battery            J20

  Speaker                     J18      Turbo switch                J21

  Reset switch                J19      Turbo LED                   J22

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select monochrome           JP3             Open

      Monitor type select color                JP3            Closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      20MB        (4) 4M x 9      (4) 1M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U22)      TAG (U23)

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8        NONE

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

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8       NONE

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

                     CACHE JUMPER CONFIGURATION

   Size      JP5      JP6       JP7       JP8      JP9       JP10

   64KB     Open      Open     Open      Open      Open     2 & 3

  128KB     Closed   Closed    Closed    Open      Open     1 & 2

  256KB     Closed   Closed    Closed    Closed   Closed    2 & 3

  Note: Pins designated should be in the closed position.

                             CPU TYPE CONFIGURATION

   Type       JP4    JP11    JP12    JP13    JP14    JP15   JP16   JP18   JP31

  80386DX    Closed   1 &    Open     2 &    N/A     N/A    N/A    2 &    Closed
                      2               3                             3

  CX486DLC   Closed   1 &   Closed    2 &    N/A     N/A    N/A    2 &    Closed
                      2               3                             3

  80486SX     N/A     2 &    N/A      1 &    Open    N/A    2 &    1 &    Open
                      3               2                      3      2

  80486DX     N/A     2 &    N/A      1 &   Closed   2 &    1 &    1 &    Open
                      3               2               3      2      2

  ODP486SX    N/A     2 &    N/A      1 &    Open    N/A    1 &    1 &    Open
                      3               2                      2      2

  80486DX2    N/A     2 &    N/A      1 &   Closed   2 &    1 &    1 &    Open
                      3               2               3      2      2

  Note:Pins designated should be in the closed position.

                 CPU SPEED CONFIGURATION

  Speed      JP24        JP25       JP26        JP27

  25MHz     Closed       Open      Closed       Open

  33MHz     Closed      Closed      Open        Open

  40MHz      Open        Open      Closed      Closed

  50iMHz    Closed       Open      Closed       Open

  50MHz     Closed       Open      Closed      Closed

  66iMHz    Closed      Closed      Open        Open

                      CPU CLOCK SOURCE CONFIGURATION

           Type                     JP17                    JP19

         AV9107-03                  Open                   Closed

  Oscillator installed at     pins 1 & 2 closed       pins 2 & 3 closed
           OSC1