WESTERN DIGITAL CORPORATION

WD286-LPM

Processor               80286
Processor Speed         6/12.5/16MHz
Chip Set                Faraday
Max. Onboard DRAM       4MB
Cache                   None
BIOS                    Phoenix
Dimensions              330mm x 198mm
I/O Options             Parallel port, serial port (2), bus mousse port,
                        floppy drive interface, video interface, IDE
                        interface, proprietary bus expansion slot
NPU Options             80287

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Bus mouse port             J4       Parallel port                J10

  Reset switch               J6       VGA interface                J12

  Floppy drive               J7       IDE interface                J14
  interface

  Serial port 2              J8       IDE interface                J15
                                      LED/Keylock

  Serial port 1              J9       Local bus expansion          S1
                                      slot

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

  »   Monitor type select color                 W3           pins 2 & 3
                                                              closed

      Monitor type select monochrome            W3           pins 1 & 2
                                                              closed

  »   Floppy drive interface enabled            W4           pins 2 & 3
                                                              closed

      Floppy drive interface disabled           W4           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter         W5           pins 1 & 2
                                                              closed

  »   NPU speed select 6MHz                     W9           pins 2 & 3
                                                              closed

      NPU speed select 12.5MHz                  W9           pins 1 & 2
                                                              closed

      NPU speed select 16MHz                    W9           pins 1 & 2
                                                              closed

  »   Video port (J12) enabled                 W11           pins 2 & 3
                                                              closed

      Video port (J12)disabled                 W11           pins 1 & 2
                                                              closed

  »   IDE interface LED enabled                W12           pins 2 & 3
                                                              closed

      IDE interface LED disabled               W12           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        W15           pins 2 & 3
                                                              closed

  »   Mouse port interrupt enabled             W16            Closed
      (IRQ12)

      Mouse port interrupt disabled            W16             Open
      (IRQ12)

  »   Factory configured - do not alter        W17             Open

                            DRAM CONFIGURATION

          Size                   Bank 0                   Bank 1

          1MB                 (2) 256K x 9             (2) 256K x 9

          2MB                  (2) 1M x 9                  NONE

          4MB                  (2) 1M x 9               (2) 1M x 9

  Note:Bank 2 is an optional 128KB soldered onto the board on the 12MHz
  version only.