UNIDENTIFIED

AT286

Processor         80286
Processor Speed   12/16MHz
Chip Set          Headland
Max. Onboard DRAM 16MB
Cache             None
BIOS              AMI/Award/Phoenix
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Reset switch                JP6       Turbo LED                  T1

  Power LED & keylock         J20       Turbo switch               T2

  Speaker                      SP

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   NPU speed select 10MHz                 J21             pins 1 & 2
                                                               closed

      NPU speed select 6MHz                  J21             pins 2 & 3
                                                               closed

  »   Wait state select 0                    0WS               Closed

      Wait state select 1                    0WS                Open

  »   Monitor type select color            DSP1/2                On

      Monitor type select                  DSP1/2               Off
      monochrome

  »   BIOS type select 27128               DSP1/5                On

      BIOS type select 27256               DSP1/5               Off

                            DRAM CONFIGURATION

           Size                   Bank 0                   Bank 1

          512KB                 (18) 41256                  NONE

          640KB                 (18) 41256               (18) 4164

           1MB                  (18) 41256               (18) 41256

  640KB + EMS (16KB x 24        (18) 41256               (18) 41256
          pages)

           2MB                  (18) 411000                 NONE

  640KB + EMS (16KB x 88        (18) 411000                 NONE
          pages)

           4MB                  (18) 411000             (18) 411000

    640KB + EMS (16KB x         (18) 411000             (18) 411000
        216 pages)

                         DRAM SWITCH CONFIGURATION

         Size               DSP1/6           DSP1/7           DSP1/8

         512KB                On               On               On

         640KB                On               On               Off

          1MB                 On               Off              On

  640KB + EMS (16KB x         On               Off              Off
       24 pages)

          2MB                 Off              On               On

  640KB + EMS (16KB x         Off              On               Off
       88 pages)

          4MB                 Off              Off              On

  640KB + EMS (16KB x         Off              Off              Off
      216 pages)