AMERICAN MEGATRENDS, INC.
=========================

   486 GEMINI

   Processor             80486DX                                  
   Processor Speed       25/33MHz                                 
   Chip Set              C & T                                    
   Max. Onboard DRAM     20MB                                     
   Cache                 64KB                                     
   BIOS                  AMI                                      
   Dimensions            355.6mm x 304mm                          
   I/O Options           32-bit external memory card slot         
   NPU Options           3167                                     

<gopher://bitreich.org/I/th99/m/A-B/30923-1.png>
   

   +------------------------------------------------------------+
   |                        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    |  SW1/1   |    Off    ||
   |   | alter                          |          |           ||
   |---+--------------------------------+----------+-----------||
   |>> | 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 0        |        Bank 1         |
   |--------------+---------------------+-----------------------|
   |     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 |
   +------------------------------------------------------------+