
UNIDENTIFIED

VLSI-286

Processor          80286
Processor Speed    12MHz
Chip Set           VLSI
Max. Onboard DRAM  4MB
Cache              None
BIOS               Unidentified
Dimensions         330mm x 218mm
I/O Options        None
NPU Options        80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J3       Turbo switch                J20

  Speaker                     J18      Power LED & keylock         J21

  Reset switch                J19      Turbo LED                   J22

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP1            Closed

      Monitor type select monochrome           JP1             Open

     Battery type select internal             J3            pins 2 & 3
                                                              closed

      Battery type select external             J3             Closed

     BIOS wait state select 1 wait            JP6             Open
      state

      BIOS wait states select 2 wait           JP6            Closed
      states

     Oscillator select Y2                     JP9           pins 1 & 2
                                                              closed

      Oscillator select Y1                     JP9           pins 2 & 3
                                                              closed

     BIOS type select 27256                  JP14            Closed

      BIOS type select 27128                  JP14             Open

     DRAM wait state select 0 wait           JP13            Closed
      states

      DRAM wait state select 1 wait           JP13             Open
      states

     CPU speed select switchable at           J20           pins 1 & 2
      keyboard                                                closed

      CPU speed select forced high             J20           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

  Size     Bank 0      P-0       Bank 1      P-1      Bank 2     Bank 3

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

  640KB      (4)        (2)       (16)     (2) 4164    NONE       NONE
           44256      41256       4164

   1MB       (4)        (2)       NONE        (2)       (4)       NONE
           44256      41256                 41256      44256

   2MB      NONE        (2)       NONE       NONE      NONE        (16)
                      411000                                     411000

   4MB      NONE        (2)       (16)        (2)      NONE        (16)
                      411000     411000     411000               411000

       DRAM JUMPER CONFIGURATION

   Size      JP3       JP4       JP5

  512KB     Closed   Closed    Closed

  640KB     Closed   Closed     Open

   1MB      Closed    Open     Closed

   2MB      Closed    Open      Open

   4MB       Open    Closed    Closed

