(TXT) View Source
       
       # AMERICAN MEGATRENDS, INC.
       
          80386 25/33 AT MARK II
       
          Processor             80386DX                                  
          Processor Speed       25/33MHz                                 
          Chip Set              C & T                                    
          Max. Onboard DRAM     20MB                                     
          Cache                 64KB                                     
          BIOS                  AMI                                      
          Dimensions            355mm x 304mm                            
          I/O Options           32-bit external memory card slot         
          NPU Options           80387/3167                               
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose      | Location | Purpose               | Location |
          |--------------+----------+-----------------------+----------|
          | Turbo LED    |    J1    | Power LED & keylock   |    J8    |
          |--------------+----------+-----------------------+----------|
          | Reset switch |    J2    | External battery      |    J9    |
          |--------------+----------+-----------------------+----------|
          | Speaker      |    J7    | 32-bit external       |    S1    |
          |              |          | memory card           |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function                | Switch  | Position |
          |---------------------------------------+---------+----------|
          | » | Factory configured - do not alter |  SW1/1  |   Off    |
          |---+-----------------------------------+---------+----------|
          | » | Monitor type select monochrome    |  SW1/2  |   Off    |
          |---+-----------------------------------+---------+----------|
          |   | Monitor type select color         |  SW1/2  |    On    |
          |---+--------------------------------------------------------|
          |   | Note: Cache is factory installed and is not            |
          |   | configurable. The size and location of cache and tag   |
          |   | are unidentified.                                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |     Size      |       Bank 1        |        Bank 2        |
          |---------------+---------------------+----------------------|
          |      1MB      |     (36) 41256      |         NONE         |
          |---------------+---------------------+----------------------|
          |      1MB      |        NONE         |     (4) 256K x 9     |
          |---------------+---------------------+----------------------|
          |      2MB      |     (36) 41256      |     (4) 256K x 9     |
          |---------------+---------------------+----------------------|
          |      4MB      |     (36) 411000     |         NONE         |
          |---------------+---------------------+----------------------|
          |      4MB      |        NONE         |      (4) 1M x 9      |
          |---------------+---------------------+----------------------|
          |      5MB      |     (36) 41256      |      (4) 1M x 9      |
          |---------------+---------------------+----------------------|
          |      5MB      |     (36) 411000     |     (4) 256K x 9     |
          |---------------+---------------------+----------------------|
          |      8MB      |     (36) 411000     |      (4) 1M x 9      |
          |---------------+---------------------+----------------------|
          |     16MB      |        NONE         |      (4) 4M x 9      |
          |---------------+---------------------+----------------------|
          |     17MB      |     (36) 41256      |      (4) 4M x 9      |
          |---------------+---------------------+----------------------|
          |     20MB      |     (36) 411000     |      (4) 4M x 9      |
          |------------------------------------------------------------|
          | Note: There were two versions of this board made, one that |
          | had 1MB of DIPP DRAM installed and one that had 4MB of     |
          | DIPP DRAM installed. The 1MB version could be upgraded by  |
          | the factory to support 4MB of DIPP DRAM.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |  Size   |        J26         |             J27             |
          |---------+--------------------+-----------------------------|
          |   1MB   |        Open        | pins 1 & 2 and 3 & 4 closed |
          |---------+--------------------+-----------------------------|
          |   1MB   |        Open        | pins 2 & 3 and 4 & 5 closed |
          |---------+--------------------+-----------------------------|
          |   2MB   |        Open        | pins 1 & 2 and 3 & 4 closed |
          |---------+--------------------+-----------------------------|
          |   4MB   |        Open        | pins 1 & 2 and 3 & 4 closed |
          |---------+--------------------+-----------------------------|
          |   4MB   |        Open        | pins 2 & 3 and 4 & 5 closed |
          |---------+--------------------+-----------------------------|
          |   5MB   |        Open        | pins 1 & 2 and 3 & 4 closed |
          |---------+--------------------+-----------------------------|
          |   5MB   |        Open        | pins 2 & 3 and 4 & 5 closed |
          |---------+--------------------+-----------------------------|
          |   8MB   |        Open        | pins 2 & 3 and 4 & 5 closed |
          |---------+--------------------+-----------------------------|
          |  16MB   | pins 1 & 2 closed  | pins 2 & 3 and 4 & 5 closed |
          |---------+--------------------+-----------------------------|
          |  17MB   | pins 1 & 2 closed  | pins 1 & 2 and 3 & 4 closed |
          |---------+--------------------+-----------------------------|
          |  20MB   | pins 1 & 2 closed  | pins 1 & 2 and 3 & 4 closed |
          +------------------------------------------------------------+