
UNIDENTIFIED

286-12/16/20

Processor         80286
Processor Speed   12/16/20MHz
Chip Set          Acer
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

  External battery            J1       Reset switch                CN3

  Speaker                     CN1      Turbo switch                CN4

  Turbo LED                   CN2      Power LED & keylock         CN5

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

      Coprocessor synchronous with CPU         J2            pins 2 & 3
                                                              closed

      Coprocessor asynchronous with CPU        J2            pins 1 & 2
      (need extra OSC)                                        closed

     8 bit BIOS enabled                       J3             Closed

      16 bit BIOS enabled                      J3              Open

     Bus speed select AT clock                J4             Closed

      Bus speed select 1/2 CPU clock           J4              Open

     Parity check enabled                     J5              Open

      Parity check disabled                    J5             Closed

     CMOS memory normal operation             J7              Open

      CMOS memory clear                        J7             Closed

     Monitor type select monochrome           J8            pins 1 & 2
                                                              closed

      Monitor type select color                J8            pins 2 & 3
                                                              closed

     Internal battery enabled                 J9            pins 2 & 3
                                                              closed

      External battery enabled                 J9            pins 1 & 2
                                                              closed

  Note:The exact location of jumper J7 is unidentified by the
  manufacturer.

                            DRAM CONFIGURATION

     Size          Bank 0        Parity 0       Bank 1         Parity 1

     512KB       (4) 44256      (2) 41256        NONE            NONE

     640KB       (4) 44256      (2) 41256      (4) 4464        (2) 4164

     640KB      (2) 256K x 9    (2) 41256      (4) 4464        (2) 4164

    1024KB       (4) 44256      (2) 41256      (4) 44256       (2) 4164

    1024KB      (2) 256K x 9       NONE       (2) 256K x 9       NONE

    2048KB       (2) 1M x 9        NONE          NONE            NONE

    4096KB       (2) 1M x 9        NONE       (2) 1M x 9         NONE

