UNIDENTIFIED

P386 MAINBOARD

Processor              80386
Processor Speed        20/25MHz
Chip Set               C & T
Video Chip Set         None
Maximum Onboard Memory 16MB (8 MB on external memory card)
Maximum Video Memory   None
Cache                  None
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            External memory card
NPU Options            80287/80387

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                Location

  Auxiliary keyboard          J2        Turbo LED                 J16
  connector

  External battery            J3        Speaker                   J17

  Reset switch                J10       Power LED & keylock       J18

  Turbo switch                J15       External memory           SL1
                                        card

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

  »   CMOS memory normal operation             J4              Open

      CMOS memory clear                        J4             Closed

      Monitor type select color                J5           Pins 1 & 2
                                                              closed

      Monitor type select monochrome           J5           Pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

   Size        Start      Bank 0      Bank 1       Bank 2       Bank 3
               Bank

  1MB (A)      SIP        (4) 256K     None         None         None
                            x 9

  1MB (B)      DIP         None        None      (8) 44256       None

  2MB (A)      SIP        (4) 256K    (4) 256K      None         None
                            x 9         x 9

  2MB (B)      DIP         None        None      (8) 44256     (8) 44256

  4MB (A)      SIP        (4) 256K    (4) 256K   (8) 44256     (8) 44256
                            x 9         x 9

  4MB (B)      DIP        (4) 256K    (4) 256K   (8) 44256     (8) 44256
                            x 9         x 9

  4MB (C)      SIP        (4) 1M x     None         None         None
                             9

    8MB        SIP        (4) 1M x    (4) 1M x      None         None
                             9           9

  10MB (A)     SIP        (4) 1M x    (4) 1M x   (8) 44256     (8) 44256
                             9           9

  10MB (B)     DIP        (4) 1M x    (4) 1M x   (8) 44256     (8) 44256
                             9           9

               DRAM PARITY CONFIGURATION

     Size      Start Bank        P 2          P 3

   1MB (A)         SIP          None          None

   1MB (B)         DIP        (4) 41256       None

   2MB (A)         SIP          None          None

   2MB (B)         DIP        (4) 41256    (4) 41256

   4MB (A)         SIP        (4) 41256    (4) 41256

   4MB (B)         DIP        (4) 41256    (4) 41256

   4MB (C)         SIP          None          None

     8MB           SIP          None          None

   10MB (A)        SIP        (4) 41256    (4) 41256

   10MB (B)        DIP        (4) 41256    (4) 41256

                         DRAM JUMPER CONFIGURATION

      Size            J6            J7             J8             J9

    1MB (A)       1 & 2, 3 &     1 & 2, 3 &    1 & 2, 3 &    1 & 2, 3 & 4
                      4              4             4

    1MB (B)       2 & 3, 4 &     2 & 3, 4 &    2 & 3, 4 &    2 & 3, 4 & 5
                      5              5             5

    2MB (A)       1 & 2, 3 &     1 & 2, 3 &    1 & 2, 3 &    1 & 2, 3 & 4
                      4              4             4

    2MB (B)       2 & 3, 4 &     2 & 3, 4 &    2 & 3, 4 &    2 & 3, 4 & 5
                      5              5             5

    4MB (A)       1 & 2, 3 &     1 & 2, 3 &    1 & 2, 3 &    1 & 2, 3 & 4
                      4              4             4

    4MB (B)       2 & 3, 4 &     2 & 3, 4 &    2 & 3, 4 &    2 & 3, 4 & 5
                      5              5             5

    4MB (C)       1 & 2, 3 &     1 & 2, 3 &    1 & 2, 3 &    1 & 2, 3 & 4
                      4              4             4

      8MB         1 & 2, 3 &     1 & 2, 3 &    1 & 2, 3 &    1 & 2, 3 & 4
                      4              4             4

    10MB (A)      1 & 2, 3 &     1 & 2, 3 &    1 & 2, 3 &    1 & 2, 3 & 4
                      4              4             4

    10MB (B)      2 & 3, 4 &     2 & 3, 4 &    2 & 3, 4 &    2 & 3, 4 & 5
                      5              5             5

  Note: Pins designated should be in the closed position.

                        NPU SELECTION

       Setting               J11                  J12

        None           Pins 2 & 3 closed          Open

        80287          Pins 2 & 3 closed          Open

        80387          Pins 1 & 2 closed         Closed