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

   VESA 486 Version 1.1

   Processor         80486SX/80487SX/80486DX/ODP486SX/80486DX2    
   Processor Speed   25/33/50(internal)/50MHz                     
   Chip Set          UMC                                          
   Max. Onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        220mm x 220mm                                
   I/O Options       None                                         
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/U-Z/31759-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |    J1    | Speaker           |    J7    |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |    J4    | Power LED &       |    J8    |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |    J5    | 32-bit VESA Local |    S1    |
   |                  |          | bus slot          |          |
   |------------------+----------+-------------------+----------|
   | Reset switch     |    J6    | 32-bit VESA Local |    S2    |
   |                  |          | bus slot          |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | Monitor type select color      |  JP1   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |  JP1   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |    64KB    |  (4) 8K x 8   |  (4) 8K x 8   |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (2) 32K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |  JP8   |  JP9   |      JP10       |      JP11      |
   |-------+--------+--------+-----------------+----------------|
   | 64KB  |  Open  |  Open  |   pins 1 & 2    |   pins 1 & 2   |
   |       |        |        |     closed      |     closed     |
   |-------+--------+--------+-----------------+----------------|
   | 128KB |  Open  | Closed |   pins 2 & 3    |   pins 2 & 3   |
   |       |        |        |     closed      |     closed     |
   |-------+--------+--------+-----------------+----------------|
   | 256KB | Closed | Closed |   pins 2 & 3    |   pins 1 & 2   |
   |       |        |        |     closed      |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Type   |            JP14             |       JP15        |
   |----------+-----------------------------+-------------------|
   | 80486SX  |      pins 2 & 3 closed      |       Open        |
   |----------+-----------------------------+-------------------|
   | 80487SX  | pins 1 & 2 and 3 & 4 closed | pins 2 & 3 closed |
   |----------+-----------------------------+-------------------|
   | 80486DX  | pins 1 & 2 and 3 & 4 closed | pins 1 & 2 closed |
   |----------+-----------------------------+-------------------|
   | ODP486SX | pins 1 & 2 and 3 & 4 closed | pins 2 & 3 closed |
   |----------+-----------------------------+-------------------|
   | 80486DX2 | pins 1 & 2 and 3 & 4 closed | pins 1 & 2 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Speed  |     JP4     |     JP5     |    JP6    |   JP7    |
   |---------+-------------+-------------+-----------+----------|
   |  25MHz  |   Closed    |   Closed    |   Open    |   Open   |
   |---------+-------------+-------------+-----------+----------|
   |  33MHz  |   Closed    |    Open     |   Open    |   Open   |
   |---------+-------------+-------------+-----------+----------|
   | 50i MHz |   Closed    |   Closed    |   Open    |   Open   |
   |---------+-------------+-------------+-----------+----------|
   |  50MHz  |    Open     |    Open     |   Open    |   Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          VESA WAIT STATE/BUS SPEED CONFIGURATION           |
   |------------------------------------------------------------|
   |   CPU speed   |  Wait states  |     JP12     |    JP13     |
   |---------------+---------------+--------------+-------------|
   |    GBP 33MHz    | 0 wait states |     Open     |    Open     |
   |---------------+---------------+--------------+-------------|
   |    > 33MHz    | 1 wait state  |    Closed    |   Closed    |
   +------------------------------------------------------------+