
UNIDENTIFIED

NEAT-286 (VER. 2)

Processor              80286
Processor Speed        16/20MHz
Chip Set               Neat
Video Chip Set         None
Maximum Onboard Memory 8MB
Maximum Video Memory   None
Cache                  None
BIOS                   Unidentified
Dimensions             330mm x 218mm
I/O Options            External memory card
NPU Options            80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J1       Turbo switch                JP7

  Speaker                     J2       Turbo LED                   LF1

  External battery            J3       External memory card        SL1

  Reset switch                JP1

                        USER CONFIGURABLE SETTINGS

                 Function                     Label          Position

      NPU asynchronous with CPU                JP2           Pins 1 & 2
                                                              closed

      NPU synchronous with CPU                 JP2           Pins 2 & 3
                                                              closed

      BIOS type select 27128                   JP4           Pins 1 & 2
                                                              closed

      BIOS type select 27256                   JP4           Pins 2 & 3
                                                              closed

      CPU = CPU speed                          JP5           Pins 1 & 2
                                                              closed

      CPU = NPU OSC speed                      JP5           Pins 2 & 3
                                                              closed

      Monitor type select color                JP6            Closed

      Monitor type select monochrome           JP6             Open

                            DRAM CONFIGURATION

     Size          Bank A          Bank B         Bank C        Bank D

    512KB        (18) 41256         None           None          None

    640KB        (18) 41256      (18) 4164         None          None

     1MB         (18) 41256      (18) 41256        None          None

    1.5MB        (18) 41256      (18) 41256     (2) 256K x       None
                                                    9

    1.64MB       (18) 41256      (18) 4164      (2) 256K x   (2) 256K x 9
                                                    9

     2MB         (18) 411000        None           None          None

     2MB         (18) 41256      (18) 41256     (2) 256K x   (2) 256K x 9
                                                    9

     3MB         (18) 41256      (18) 41256     (2) 1M x 9       None

     4MB         (18) 411000    (18) 411000        None          None

    4.64MB       (18) 41256      (18) 4164      (2) 1M x 9    (2) 1M x 9

     5MB         (18) 41256      (18) 41256     (2) 1M x 9    (2) 1M x 9

     6MB         (18) 411000    (18) 411000     (2) 1M x 9       None

     8MB         (18) 411000    (18) 411000     (2) 1M x 9    (2) 1M x 9

                         DRAM JUMPER CONFIGURATION

             Setting                                JP3

       Banks C & D = Bank 0          1 & 2, 3 & 4, 6 & 7, 11 & 12, 13 &
                                     14, 16 & 17, 18 & 19, 23 & 24, 28 &
       Banks A & B = Bank 1                          29

       Banks A & B = Bank 0         2 & 3, 4 & 5, 7 & 8, 9 & 10, 12 & 13,
                                     14 & 15, 17 & 18, 19 & 20, 22 & 23,
       Banks C & D = Bank 1              24 & 25, 27 & 28, 29 & 30

  Note: Pins designated should be in the closed position.

