UNIDENTIFIED

OPM 386 MOTHER BOARD

Processor         80386DX
Processor Speed   25MHz
Chip Set          OPTI
Max. Onboard DRAM 8MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       IDE interface, Floppy drive interface
NPU Options       80387DX/3167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Turbo switch                J1       Speaker                     J7

  Reset switch                J2       IDE interface               J9

  Turbo LED                   J3       Floppy drive interface      J10

  Power LED & keylock         J5       External battery            JP6

  IDE interface LED           J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

      Monitor type select color                J4           pins 1 & 2
                                                              closed

      Monitor type select monochrome           J4           pins 2 & 3
                                                              closed

  »   Pipeline disabled                        J8           pins 1 & 2
                                                              closed

      Pipeline enabled                         J8           pins 2 & 3
                                                              closed

  »   Floppy drive interface address          JP3             Closed
      select 370h - 377h

      Floppy drive interface address          JP3              Open
      select 3F0h - 3FFh

      Floppy drive interface enabled          JP4             Closed

      Floppy drive interface disabled         JP4              Open

  Note: The location of J8 is unidentified.

              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

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

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

    IDE INTERFACE CONFIGURATION

  Setting       JP1        JP2

  Enabled      Open       Closed

  Disabled    Closed       Open