SOYO COMPUTER CO., LTD.

SY-020P1/P2


Processor            80486SX/80487SX/80486DX/80486DX2
Processor Speed      20/25/33/50(internal)/50/66(internal)MHz
Chip Set             SIS
Max. Onboard DRAM    32MB
Cache                64/128/256KB
BIOS                 AMI
Dimensions           245mm x 220mm
I/O Options          None
NPU Options          None

[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

                    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) 32K x 8

                      CACHE JUMPER CONFIGURATION

   Size     JP21    JP22     JP23     JP24     JP25    JP26     JP27

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

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

  256KB    2 & 3    2 & 3    2 & 3   2 & 3    2 & 3    2 & 3    2 & 3

  Note: Pins designated should be in the closed position.

                             CPU CONFIGURATION

       Type          OSC1        JP9        JP11        JP12       JP13

  80486SX-20MHz      40MHz      2 & 3       Open       2 & 3      2 & 3

  80486SX-25MHz      25MHz      1 & 2       Open       2 & 3      2 & 3

  80487SX-20MHz      40MHz      2 & 3      Closed      2 & 3      1 & 2

  80486DX-25MHz      25MHz      1 & 2      Closed      1 & 2      1 & 2

  80486DX-33MHz      33MHz      1 & 2      Closed      1 & 2      1 & 2

  80486DX-50MHz      50MHz      1 & 2      Closed      1 & 2      1 & 2

  80486DX2-50MHz     25MHz      1 & 2      Closed      1 & 2      1 & 2

  80486DX2-66MHz     33MHz      1 & 2      Closed      1 & 2      1 & 2

  Note: Pins designated should be in the closed position.