
UNIDENTIFIED

391WB/H

Processor         80386DX/AMD80386DX
Processor Speed   33/40MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387DX/3167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Reset switch                J4

  Speaker                     J2       Turbo switch                J5

  Turbo LED                   J3       External battery           JP13

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Turbo mode disabled                      J5             Closed

      Turbo mode enabled                       J5              Open

     NPU asynchronous with CPU                JP8            Closed

      NPU synchronous with CPU                 JP8             Open

     I/O bus speed select ATCLK/6             JP9             Open

      I/O bus speed select ATCLK/8             JP9            Closed

     Monitor type select monochrome          JP12             Open

      Monitor type select color               JP12            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

      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         Bank 1          TAG

     32KB        (4) 8K x 8        NONE       (1) 8K x 8

     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    JP1  JP2   JP3    JP4      JP5      JP6     JP14   JP15   JP16  JP17

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

  64KB    1 &  1 &   2 &    Open     Open    Closed   2 &    1 &    1 &    1 &
          2     2     3                                3      2      2     2

  128KB   2 &  1 &   2 &   Closed    Open    Closed   2 &    1 &    1 &    1 &
          3     2     3                                3      2      2     2

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

  Note: Pins designated should be in the closed position.

