
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.

