
UNIDENTIFIED

80286-12

Processor              80286
Processor Speed        6/8/10/12MHz
Chip Set               Unidentified
Video Chip Set         None
Maximum Onboard Memory 1MB
Maximum Video Memory   None
Cache                  None
BIOS                   Unidentified
Dimensions             330mm x 218mm
I/O Options            None
NPU Options            80287

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Speaker                      J1       Reset switch               J4

  Power LED & keylock          J2       Turbo LED                  JP1

  External battery             J3       Turbo switch               JP2

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      BIOS type select 27128                  JP3           Pins 1 & 2
                                                              closed

      BIOS type select 27256                  JP3           Pins 2 & 3
                                                              closed

      Monitor type select color              SW1/3              On

      Monitor type select monochrome         SW1/3             Off

                            DRAM CONFIGURATION

      Size         Starting address        Bank 0             Bank 1

      256KB        000000H - 03FFFFH      (18) 4164         (18) 4164

      512KB        000000H - 07FFFFH     (18) 41256            None

      640KB        000000H - 09FFFFH     (18) 41256         (18) 4164

     1MB (A)       000000H - 07FFFFH     (18) 41256         (18) 41256

     1MB (B)       100000H - 17FFFFH     (18) 41256         (18) 41256

     1MB (C)       000000H - 09FFFFH     (18) 41256         (18) 41256

     1MB (D)       100000H - 15FFFFH     (18) 41256         (18) 41256

  Note: The location of banks 0 & 1 are unidentified.

         DRAM SWITCH CONFIGURATION

   Size      SW1/1      SW1/2      SW1/4

   256MB       On         On        Off

   512MB      Off         On        Off

   640MB       On        Off        Off

  1MB (A)     Off        Off        Off

  1MB (B)     Off        Off        Off

  1MB (C)      On        Off        On

  1MB (D)      On        Off        On


