
UNIDENTIFIED

MICRO 286-12

Processor         80286
Processor Speed   12MHz
Chip Set          Unidentified
Max. Onboard DRAM 4MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J1       Turbo LED                   J4

  Reset switch                J2       External battery            J7

  Power LED & keylock         J3       Turbo switch                J8

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     Wait states select 0                   W1              pins 1 & 2
                                                               closed

      Wait state select 1                    W1              pins 2 & 3
                                                               closed

     Factory configured - do not            W2              pins 2 & 3
      alter                                                    closed

     BIOS type select 27256                 W6              pins 1 & 2
                                                               closed

      BIOS type select 27128                 W6              pins 2 & 3
                                                               closed

     Monitor type select color              W7                Closed

      Monitor type select                    W7                 Open
      monochrome

     Parity check enabled                   W9              pins 1 & 2
                                                               closed

      Parity check disabled                  W9              pins 2 & 3
                                                               closed

     Bus speed select fast                 SW1/2                On

      Bus speed select normal               SW1/2               Off

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1         Bank 2         Bank 3

   256KB 1       (4) 44256         NONE           NONE           NONE

    256KB           NONE           NONE        (2) 256K x        NONE
                                                   9

   512KB 2       (4) 44256         NONE           NONE           NONE

    512KB           NONE           NONE        (2) 256K x    (2) 256K x 9
                                                   9

    512KB           NONE           NONE        (2) 1M x 9        NONE

   640KB 3       (4) 44256       (4) 4464         NONE           NONE

    640KB           NONE           NONE        (2) 256K x    (2) 256K x 9
                                                   9

    640KB           NONE           NONE        (2) 1M x 9        NONE

    1MB 2        (4) 44256      (4) 44256         NONE           NONE

     1MB            NONE           NONE        (2) 256K x    (2) 256K x 9
                                                   9

     2MB            NONE           NONE        (2) 1M x 9        NONE

     4MB            NONE           NONE        (2) 1M x 9     (2) 1M x 9

  Note:If using only SIMMs don't install any chips in P-0 or P-1.

  Note 1 :If parity checking is enabled, install (2) 41256 in P-0

  Note 2 :If parity checking is enabled, install (2) 41256 in P-0 and (2)
  41256 in P-1

  Note 3 :If parity checking is enabled, install (2) 41256 in P-0 and (2)
  4164 in P-0

         DRAM SWITCH CONFIGURATION

   Size      SW1/1      SW1/2      SW1/3

  256KB 1      On         On        On

   256KB       On         On        On

  512KB 2      On        Off        On

   512KB       On        Off        On

   512KB      Off         On        On

  640KB 3      On         On        Off

   640KB       On         On        Off

   640KB      Off        Off        On

   1MB 2       On        Off        Off

    1MB        On        Off        Off

    2MB       Off         On        Off

    4MB       Off        Off        Off

