SILICON VALLEY TECHNOLOGY

486DX-33

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J1       Turbo LED                  J4

  Power LED & keylock          J2       Turbo switch               J5

  Speaker                      J3       Reset switch               J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             J9            pins 1 & 2
                                                              closed

      CMOS memory clear                        J9            pins 2 & 3
                                                              closed

  »   Monitor type select color                W8             Closed

      Monitor type select monochrome           W8              Open

              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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1           TAG

     32KB        (4) 8K x 8        NONE        (3) 16K x 4

     64KB        (4) 8K x 8     (4) 8K x 8     (3) 16K x 4

     128KB       (4) 32K x 8       NONE        (3) 16K x 4

     256KB       (4) 32K x 8    (4) 32K x 8    (3) 16K x 4

  Bank 0 = U2, U6, U10 & U14, Bank 1 = U3, U7, U11 & U15.

                 CACHE JUMPER CONFIGURATION

   Size       W1        W2        W3        W4        W5

   32KB     2 & 3      1 & 2     1 & 2     2 & 3    1 & 2

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

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

  256KB     2 & 3      2 & 3     2 & 3     1 & 2    2 & 3

  Note:Pins designated should be in the closed position.

                    CPU TYPE CONFIGURATION

   Type       W12        W13       W14        W16       W17

  80486SX     Open      Open      2 & 3      Closed     Open

  80487SX    Closed    Closed     1 & 2      Closed    2 & 3

  80486DX    Closed    Closed     1 & 2      Closed    1 & 2

  Note: Pins designated should be in the closed position.