AST RESEARCH, INC.
==================

   BRAVO 286/386SX SYSTEM BOARD (202382-001, 002, 005)

   Processor        80386SX                                       
   Processor Speed  20MHz                                         
   Chip Set         AST                                           
   Max. Onboard     16MB                                          
   DRAM             
   Cache            None                                          
   BIOS             AST                                           
   Dimensions       355mm x 251mm                                 
   I/O Options      16-bit external CPU/NPU card slot, bus mouse  
                    port, floppy interface, IDE interface,        
                    parallel port, serial ports (2), VGA port     
   NPU Options      80387SX                                       

<gopher://bitreich.org/I/th99/m/A-B/30899-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Bus mouse port   |   J12    | Floppy drive      |   J24    |
   |                  |          | interface         |          |
   |------------------+----------+-------------------+----------|
   | Parallel port    |   J13    | External battery  |   J26    |
   |------------------+----------+-------------------+----------|
   | Primary serial   |   J14    | Speaker           |   J27    |
   | port             |          |                   |          |
   |------------------+----------+-------------------+----------|
   | VGA port         |   J18    | Fan connector     |   J28    |
   |------------------+----------+-------------------+----------|
   | VGA pass-thru    |   J19    | Front panel       |   J29    |
   |                  |          | switch/display    |          |
   |------------------+----------+-------------------+----------|
   | Secondary serial |   J20    | 16-bit external   |   J34    |
   | port header      |          | CPU/NPU card      |          |
   |------------------+----------+-------------------+----------|
   | IDE interface    |   J22    | Drive active LED  |   J35    |
   |                  |          | connector         |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Switch | Position |
   |----------------------------------------+--------+----------|
   |>> | VGA interface enabled              | SW1/1  |    On    |
   |---+------------------------------------+--------+----------|
   |   | VGA interface disabled             | SW1/1  |   Off    |
   |---+------------------------------------+--------+----------|
   |>> | Password check normal operation    | SW1/2  |   Off    |
   |---+------------------------------------+--------+----------|
   |   | Password clear                     | SW1/2  |    On    |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  | SW1/3  |   Off    |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  | SW1/4  |   Off    |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  | SW1/5  |    On    |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  | SW1/6  |    On    |
   |---+------------------------------------+--------+----------|
   |>> | PS/2 mode enabled (AT mode         | SW1/7  |    On    |
   |   | disabled)                          |        |          |
   |---+------------------------------------+--------+----------|
   |   | PS/2 mode disabled (AT mode        | SW1/7  |   Off    |
   |   | enabled)                           |        |          |
   |---+------------------------------------+--------+----------|
   |>> | Monitor type select fixed          | SW1/8  |   Off    |
   |   | frequency                          |        |          |
   |---+------------------------------------+--------+----------|
   |   | Monitor type select                | SW1/8  |    On    |
   |   | multi-frequency                    |        |          |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  | SW1/9  |   Off    |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  | SW1/10 |   Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    1MB     | (2) 256K x 9  | (2) 256K x 9  |     NONE      |
   |------------+---------------+---------------+---------------|
   |   1.5MB    | (2) 256K x 9  | (2) 256K x 9  | (2) 256K x 9  |
   |------------+---------------+---------------+---------------|
   |    2MB     |  (2) 1M x 9   |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    3MB     | (2) 256K x 9  | (2) 256K x 9  |  (2) 1M x 9   |
   |------------+---------------+---------------+---------------|
   |    4MB     |  (2) 1M x 9   |  (2) 1M x 9   |     NONE      |
   |------------+---------------+---------------+---------------|
   |   4.5MB    |  (2) 1M x 9   |  (2) 1M x 9   | (2) 256K x 9  |
   |------------+---------------+---------------+---------------|
   |    6MB     |  (2) 1M x 9   |  (2) 1M x 9   |  (2) 1M x 9   |
   |------------+---------------+---------------+---------------|
   |    8MB     |  (2) 4M x 9   |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    9MB     | (2) 256K x 9  | (2) 256K x 9  |  (2) 4M x 9   |
   |------------+---------------+---------------+---------------|
   |    12MB    |  (2) 1M x 9   |  (2) 1M x 9   |  (2) 4M x 9   |
   |------------+---------------+---------------+---------------|
   |    16MB    |  (2) 4M x 9   |  (2) 4M x 9   |     NONE      |
   +------------------------------------------------------------+