AMERICAN MEGATRENDS, INC.

80386B

Processor              80386SX
Processor Speed        16/20/25MHz
Chip Set               C & T
Video Chip Set         None
Maximum Onboard Memory 16MB (8MB on external memory card)
Maximum Video Memory   None
Cache                  None
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            External memory cards (2)
NPU Options            80287 (exact location unidentified)/80387SX/3167

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock        J17       Turbo LED                  J22

  Speaker                    J18       External memory cards    SL1 & SL2

  External battery           J20

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

      Jumper information unavailable        J19          Unidentified

      80287 installed                       JP1             Closed

      80287 not installed                   JP1              Open

      Monitor type select color             JP3        Pins 1 & 2 closed

      Monitor type select monochrome        JP3        Pins 2 & 3 closed

      Jumper information unavailable        JP5          Unidentified

                            DRAM CONFIGURATION

     Size         Bank 0        Bank 1          Bank 2         Bank 3

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

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

     4MB       (4) 256K x 9   (4) 256K x 9    (36) 41256     (36) 41256

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

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

     10MB       (4) 1M x 9    (4) 1M x 9      (36) 41256     (36) 41256

     16MB       (4) 1M x 9    (4) 1M x 9     (36) 411000     (36) 411000

  Note: Banks 2 & 3 are located on the external memory card.

           CPU SPEED SELECTION

        Speed                J21

        16MHz         Pins 1 & 2 closed

        20MHz         Pins 2 & 3 closed

        25MHz         Pins 2 & 3 closed

                         NPU TYPE SELECTION

         Type                   JP11                   JP12

    80387 installed            Closed                 Closed

  80387 not installed           Open                   Open

[Image]

                         DRAM JUMPER CONFIGURATION

          Setting                    JP1                     JP2

  Card configured as Bank      Pins 1 & 2, 4 & 5      Pins 1 & 2, 4 & 5
           0 & 1                    closed                 closed

  Card configured as Bank      Pins 2 & 3, 5 & 6      Pins 2 & 3, 5 & 6
           2 & 3                    closed                 closed

  Note: If all 4 banks are populated, memory card must be set as banks 2
  & 3. Jumpers JP1 & JP2 are incorrectly labeled in the card. The correct
  label should read banks selection.