
UNIDENTIFIED

SEAT 286

Processor         80286
Processor Speed   12/16/20MHz
Chip Set          G-2
Max. Onboard DRAM 8MB (4MB on external memory card)
Cache             None
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       16-bit external memory card
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location     Purpose                Location

  Optional keyboard            J1        Turbo LED                J11
  connector

  External battery             J4        Reset switch             J13

  Power LED & keylock          J10       Speaker                  J15

  16-bit external memory       SL1
  card

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     Battery select 3.6v internal            J2               Closed

      Battery select 6V external              J2                Open

     Power good signal detect from           J3             Pins 1 & 2
      board                                                    closed

      Power good signal detect from           J3             Pins 2 & 3
      power supply                                             closed

     Monitor type select color               J5               Closed

      Monitor type select                     J5                Open
      monochrome

     BIOS type select 27256                  J6             Pins 2 & 3
                                                               closed

      BIOS type select 27128                  J6             Pins 1 & 2
                                                               closed

     Factory configured - do not             J7                N/A
      alter

     Factory configured - do not             J8                N/A
      alter

     Parity check disabled                   J9             Pins 2 & 3
                                                               closed

      Parity check enabled                    J9             Pins 1 & 2
                                                               closed

     I/O speed select half                 J12/1                On

      I/O speed select full                 J12/1               Off

     Extended 384K RAM enabled             J12/4               Off

      Extended 384K RAM disabled            J12/4                On

     DRAM type select 1M x 1               J12/6                On

      DRAM type select 256K x 4             J12/6               Off

     NPU asynchronous with CPU              J14             Pins 2 & 3
                                                               closed

      NPU synchronous with CPU               J14             Pins 1 & 2
                                                               closed

     Turbo enabled                          J16                Open

      Turbo disabled                         J16               Closed

                            DRAM CONFIGURATION

   Size       Bank 0       Bank 1      Bank 2      Bank 3       Bank 4

   512KB     (4) 44256      NONE        NONE        NONE         NONE

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

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

    2MB        NONE         NONE        NONE        (16)         NONE
                                                   421000

    4MB        NONE         NONE        NONE        (16)          (16)
                                                   421000       421000

                        PARITY CONFIGURATION

     Size          P0            P1            P2            P3

    512KB       (2) 41256       NONE          NONE          NONE

    640KB         NONE          NONE          NONE          NONE

     1MB        (2) 41256     (2) 41256       NONE          NONE

     2MB          NONE          NONE       (2) 421000       NONE

     4MB          NONE          NONE       (2) 421000    (2) 421000

          DRAM SWITCH CONFIGURATION

   Size       J12/2      J12/3       J12/5

   512KB       Off        Off         Off

   640KB       Off        Off         On

    1MB         On        Off         Off

    2MB        Off        Off         Off

    4MB         On        Off         Off

    8MB         On         On         Off

  Note: J12/4 & J12/5 must be ON for 640KB

