SOYO COMPUTER CO., LTD.

SY-022


Processor            80486SX/80487SX/80486DX/80486DX2
Processor Speed      20/25/33/50(internal)/50/66(internal)MHz
Chip Set             SIS
Max. Onboard DRAM    128MB
Cache                64/128/256KB
BIOS                 AMI
Dimensions           330mm x 218mm
I/O Options          None
NPU Options          4167


[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

  »   CMOS memory normal operation             JP5           pins 1 & 2
                                                              closed

      CMOS memory clear                        JP5           pins 2 & 3
                                                              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

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

      16MB        (4) 4M x 9         NONE

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

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

      64MB        (4) 16M x 9        NONE

      80MB        (4) 4M x 9     (4) 16M x 9

     128MB        (4) 16M x 9    (4) 16M x 9

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG            U35

     64KB        (4) 8K x 8     (4) 8K x 8    (2) 16K x 4    (1) 16K x 4

     128KB      (4) 32K x 8        NONE       (2) 16K x 4    (1) 16K x 4

     256KB      (4) 32K x 8    (4) 32K x 8    (2) 16K x 4    (1) 16K x 4

                  CACHE JUMPER CONFIGURATION

  Size     JP15     JP16     JP17     JP18     JP19    JP20

  64KB     1 & 2   1 & 2    1 & 2    1 & 2    1 & 2    3 & 4

  128KB    1 & 2   2 & 3    2 & 3    2 & 3    2 & 3    1 & 2

  256KB    2 & 3   2 & 3    2 & 3    2 & 3    2 & 3    4 & 5

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type               JP12               JP13              JP14

      80486SX           pins 2 & 3           Open              Open
                         closed

      80487SX           pins 1 & 2        pins 2 & 3           Open
                         closed             closed

      80486DX           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

     80486DX2           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed