UNIDENTIFIED

OPTI-486WB (VERSION 2)

Processor         80486SX/80486DX
Processor Speed   33MHz
Chip Set          OPTI
Max. onboard DRAM 32MB
Cache             64/128/256/512KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J1       Reset switch                J4

  Turbo switch                J2       External battery            J22

  Power LED & keylock         J3       Turbo LED                   JP1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP12            Closed

      Monitor type select monochrome          JP12             Open

  »   Factory configured - do not alter       JP11              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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1        TAG U34        TAG U35

     64KB        (8) 8K x 8        NONE          NONE          8K x 8

     128KB       (8) 8K x 8     (8) 8K x 8       NONE          8K x 8

     256KB      (8) 32K x 8        NONE          NONE          8K x 8

     512KB      (8) 32K x 8    (8) 32K x 8      8K x 8         8K x 8

                        CACHE JUMPER CONFIGURATION

    Size         JP6         JP7         JP8          JP9         JP10

    64KB         Open      pins 2 &      Open         Open        Open
                              3

   128KB        Closed     pins 2 &      Open         Open       Closed
                              3

   256KB        Closed     pins 2 &      Open        Closed      Closed
                              3

   512KB        Closed     pins 1 &     Closed       Closed      Closed
                              2

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type               JP2                JP3               JP4

      80486DX          pins 1 & 2         pins 2 & 3          Closed
                         closed            closed

      80486SX             Open            pins 1 & 2           Open
                                           closed