UNIDENTIFIED
============

   386SX MAINBOARD

   Processor    80386SX                                           
   Processor    16/20/25/33MHz                                    
   Speed        
   Chip Set     Unidentified                                      
   Max. Onboard 16MB                                              
   DRAM         
   Cache        None                                              
   BIOS         Award                                             
   Dimensions   254mm x 220mm                                     
   I/O Options  Floppy drive interface, IDE interface, parallel   
                port, PS/2 mouse port, serial ports (2), VGA port 
   NPU Options  80387SX                                           

<gopher://bitreich.org/I/th99/m/U-Z/32531-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | VGA port          |   CN1    | Speaker          |    J2    |
   |-------------------+----------+------------------+----------|
   | Parallel port     |   CN2    | IDE interface    |    J3    |
   |                   |          | LED              |          |
   |-------------------+----------+------------------+----------|
   | Serial port 1     |   CN3    | Reset switch     |    J4    |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |   CN4    | Turbo switch     |    J5    |
   |-------------------+----------+------------------+----------|
   | PS/2 mouse port   |   CN5    | Turbo LED        |    J6    |
   |-------------------+----------+------------------+----------|
   | IDE interface     |   CN6    | External battery |    J8    |
   |-------------------+----------+------------------+----------|
   | Floppy drive      |   CN7    | Riser Card       |   SL1    |
   | interface         |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Power LED &       |    J1    |                  |          |
   | keylock           |          |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Battery type select internal     |   J7   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery type select external     |   J7   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select monochrome   |  JP2   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select color        |  JP2   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP6   | pins 1 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP6   | pins 2 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Video mode select interlaced     |  JP7   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Video mode select non-interlaced |  JP7   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | On board VGA enabled             |  JP12  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | On board VGA disabled            |  JP12  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select VESA         |  JP14  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select VGA          |  JP14  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |      512KB       |    (2) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       1MB        |    (2) 256K x 9    |    (2) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       2MB        |     (2) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       4MB        |     (2) 1M x 9     |     (2) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (2) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       16MB       |     (2) 4M x 9     |     (2) 4M x 9     |
   +------------------------------------------------------------+