
SILICON VALLEY COMPUTER, INC.

486WB

Processor         80486DX
Processor Speed   33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              C & T
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  External battery           J10       32-bit external             S1
                                       memory card

  Power LED & keylock        J23       Reset switch               SW1

  Speaker                    J24       Turbo switch               SW2

  Turbo LED                 JP12

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper          Position

     Monitor type select CGA                   JP1            Closed

      Monitor type select monochrome,           JP1             Open
      EGA, or VGA

     CMOS memory normal operation              JP2          pins 2 & 3
                                                               closed

      CMOS memory clear                         JP2          pins 1 & 2
                                                               closed

     Bus speed select ATCLK/4                  JP3            Closed

      Bus speed select ATCLK/6                  JP3             Open

     Factory configured - do not alter         JP4             N/A

     Factory configured - do not alter         JP5             N/A

     Factory configured - do not alter         JP6             N/A

     Factory configured - do not alter         JP7             N/A

              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

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0       TAG (U33)      TAG (U34)

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

     256KB       (8) 8K x 8    (1) 64K x 1    (1) 32K x 8

           CACHE JUMPER CONFIGURATION

   Size      JP8       JP9      JP10      JP11

   64KB      Open     Open      Open      Open

  256KB     Closed   Closed    Closed    Closed

