
SOYO COMPUTER CO., LTD.

SY-033 A2/A5/A1M

Device Type            Mainboard
Processor              Pentium
Processor Speed        75/90/100MHz
Chip Set               Unidentified
Maximum Onboard Memory 128MB
Cache                  256/512/1024KB
BIOS                   Unidentified
Dimensions             254mm x 218mm
I/O Options            32-bit PCI slots (4)

[Image]

                                CONNECTIONS

  Purpose                   Location     Purpose                Location

  Green PC connector          BSW1       Reset switch             J19

  5v power                     J2        Turbo switch             J21

  3.3v power                   J3        Turbo LED                J22

  Power LED & keylock          J17       Chassis fan power        JP9

  Speaker                      J18       32-bit PCI slots       PC1  PC4

                        USER CONFIGURABLE SETTINGS

              Function                   Label            Position

     BIOS type select EPROM              JP1         Pins 2 & 3, 4 & 5
                                                           closed

      BIOS type select flash              JP1         Pins 1 & 2, 5 & 6
                                                           closed

     Monitor type select color           JP3              Closed

      Monitor type select                 JP3               Open
      monochrome

     Factory configured - do not         JP5           Unidentified
      alter

     Factory configured - do not         JP7         Pins 2 & 3 closed
      alter

     External fan controlled by          JP8         Pins 1 & 2 closed
      JP18

      External fan always enabled         JP8         Pins 2 & 3 closed

     Factory configured - do not         JP11        Pins 1 & 2 closed
      alter

     Factory configured - do not         JP12        Pins 2 & 3 closed
      alter

     Factory configured - do not         JP13        Pins 1 & 2 closed
      alter

     Clock generator select              JP17        Pins 1 & 2 closed
      stopped by STPCLK

      Clock generator select              JP17        Pins 2 & 3 closed
      stopped by SMOUT

     Fan control select stopped by       JP18        Pins 1 & 2 closed
      STPCLK

      Fan control select stopped by       JP18        Pins 2 & 3 closed
      SMOUT

     Factory configured - do not         JP20        Pins 2 & 3 closed
      alter

     Factory configured - do not         SLED          Unidentified
      alter

  Note: The location of JP8 is unidentified.

                SIMM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         None

       4MB        (2) 512K x 36         None

       4MB        (2) 256K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      12MB        (2) 512K x 36     (2) 1M x 36

      16MB         (2) 2M x 36          None

      16MB         (2) 1M x 36      (2) 1M x 36

      20MB        (2) 512K x 36     (2) 2M x 36

      24MB         (2) 1M x 36      (2) 2M x 36

      32MB         (2) 4M x 36          None

      32MB         (2) 2M x 36      (2) 2M x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 1M x 36      (2) 4M x 36

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

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      72MB         (2) 1M x 36      (2) 8M x 36

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

      96MB         (2) 4M x 36      (2) 8M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

      128MB        (2) 16M x 36         None

                  SIMM JUMPER CONFIGURATION

        Size                 JP15                 JP16

         2MB           Pins 1 & 2 closed   Pins 1 & 2 closed

         4MB           Pins 1 & 2 closed   Pins 1 & 2 closed

         4MB           Pins 2 & 3 closed   Pins 2 & 3 closed

         8MB           Pins 2 & 3 closed   Pins 2 & 3 closed

         8MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        12MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        16MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        16MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        20MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        24MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        32MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        32MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        36MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        40MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        48MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        64MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        64MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        72MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        80MB           Pins 2 & 3 closed   Pins 2 & 3 closed

        96MB           Pins 1 & 2 closed   Pins 1 & 2 closed

        128MB          Pins 2 & 3 closed   Pins 2 & 3 closed

        128MB          Pins 1 & 2 closed   Pins 1 & 2 closed

              CACHE CONFIGURATION

      Size          Bank 0           TAG

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

     512KB        (8) 64K x 8    (1) 16K x 8

      1MB         (8) 128K x 8   (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size              JP10                JP14               JP20

      256KB           Pins 2 & 3         Pins 1 & 2            Open
                       closed              closed

      512KB           Pins 1 & 2         Pins 1 & 2           Closed
                       closed              closed

       1MB            Pins 2 & 3         Pins 2 & 3           Closed
                       closed              closed

                            CPU SPEED SELECTION

  CPU speed     Clock     Multiplier       JP2         JP4         JP6
               speed

   75MHz       50MHz         1.5x         Open        Open        Open

   90MHz       60MHz         1.5x        Closed       Open        Open

   100MHz      66MHz         1.5x        Closed      Closed      Closed

