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

   486/25 MAINBOARD

   Processor         80486SX                                      
   Processor Speed   25MHz                                        
   Chip Set          Unidentified                                 
   Max. Onboard DRAM None (8MB or 16MB on riser card)             
   Cache             None (8KB is on the CPU)                     
   BIOS              Award                                        
   Dimensions        330mm x 225mm                                
   I/O Options       None                                         
   NPU Options       80387DX                                      

<gopher://bitreich.org/I/th99/m/U-Z/32917-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |   CON1   | Speaker           |   CON5   |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |   CON2   | Power LED &       |   CON6   |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |   CON3   | Riser Card        |    S1    |
   |------------------+----------+-------------------+----------|
   | Reset switch     |   CON4   |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | Battery type select       |      JP1      | pins 2 & 3 |
   |   | external                  |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Battery type select       |      JP1      | pins 1 & 2 |
   |   | internal                  |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select       |      JP2      | pins 2 & 3 |
   |   | monochrome                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select color |      JP2      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Power good from mainboard |      JP3      | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Power good from power     |      JP3      | pins 1 & 2 |
   |   | supply                    |               |   closed   |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/U-Z/32917-2.png>
                                                         

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 1       |       Bank 2       |
   |------------------+--------------------+--------------------|
   |       1MB        |     (36) 41256     |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |     (36) 41256     |      (1) 41256     |
   |------------------+--------------------+--------------------|
   |       4MB        |     (36) 41000     |        NONE        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (36) 41000     |     (36) 41000     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 MEMORY CARD CONFIGURATION                  |
   |------------------------------------------------------------|
   | Select | SW1/1  | SW1/2  | SW1/3  | SW1/4  | SW1/5 | SW1/6 |
   |--------+--------+--------+--------+--------+-------+-------|
   |  1MB   |   On   |   On   |   On   |   On   |  On   |  On   |
   |--------+--------+--------+--------+--------+-------+-------|
   |  2MB   |  Off   |   On   |   On   |   On   |  On   |  Off  |
   |--------+--------+--------+--------+--------+-------+-------|
   |  4MB   |  Off   |  Off   |   On   |   On   |  Off  |  On   |
   |--------+--------+--------+--------+--------+-------+-------|
   |  8MB   |  Off   |  Off   |  Off   |   On   |  Off  |  Off  |
   |------------------------------------------------------------|
   | Note: SW1 is located on the mainboard.                     |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/U-Z/32917-3.png>
   

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 1MB  | (4) 256K x  |    NONE     |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 2MB  | (4) 256K x  | (4) 256K x  |    NONE    |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 256K x  | (4) 256K x  | (4) 256K x | (4) 256K x |
   |      |      9      |      9      |     9      |     9      |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 1M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (4) 1M x 9  | (4) 1M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 16MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
   |------------------------------------------------------------|
   | Note: This may be SIMM or SIP                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 MEMORY CARD CONFIGURATION                  |
   |------------------------------------------------------------|
   | Select | SW1/1  | SW1/2  | SW1/3  | SW1/4  | SW1/5 | SW1/6 |
   |--------+--------+--------+--------+--------+-------+-------|
   |  1MB   |   On   |   On   |   On   |   On   |  On   |  On   |
   |--------+--------+--------+--------+--------+-------+-------|
   |  2MB   |  Off   |   On   |   On   |   On   |  On   |  Off  |
   |--------+--------+--------+--------+--------+-------+-------|
   |  4MB   |  Off   |  Off   |   On   |   On   |  On   |  Off  |
   |--------+--------+--------+--------+--------+-------+-------|
   |  4MB   |  Off   |  Off   |   On   |   On   |  Off  |  On   |
   |--------+--------+--------+--------+--------+-------+-------|
   |  8MB   |  Off   |  Off   |  Off   |   On   |  Off  |  Off  |
   |--------+--------+--------+--------+--------+-------+-------|
   |  16MB  |  Off   |  Off   |  Off   |  Off   |  Off  |  Off  |
   |------------------------------------------------------------|
   | Note: SW1 is located on the mainboard.                     |
   +------------------------------------------------------------+