SILICON VALLEY TECHNOLOGY
=========================

   486DX-33

   Processor             80486SX/80487SX/80486DX                  
   Processor Speed       20/25/33MHz                              
   Chip Set              UMC                                      
   Max. Onboard DRAM     32MB                                     
   Cache                 32/64/128/256KB                          
   BIOS                  AMI                                      
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/S-T/30232-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | External battery    |    J1    | Turbo LED      |    J4    |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |    J2    | Turbo switch   |    J5    |
   |---------------------+----------+----------------+----------|
   | Speaker             |    J3    | Reset switch   |    J6    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |   J9   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |   J9   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select color      |   W8   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |   W8   |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |    32KB    |  (4) 8K x 8   |     NONE      |  (3) 16K x 4  |
   |------------+---------------+---------------+---------------|
   |    64KB    |  (4) 8K x 8   |  (4) 8K x 8   |  (3) 16K x 4  |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     NONE      |  (3) 16K x 4  |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (3) 16K x 4  |
   |------------------------------------------------------------|
   | Bank 0 = U2, U6, U10 & U14, Bank 1 = U3, U7, U11 & U15.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |    W1    |    W2    |   W3    |   W4   |   W5   |
   |----------+----------+----------+---------+--------+--------|
   |   32KB   |  2 & 3   |  1 & 2   |  1 & 2  | 2 & 3  | 1 & 2  |
   |----------+----------+----------+---------+--------+--------|
   |   64KB   |  2 & 3   |  1 & 2   |  1 & 2  | 1 & 2  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  128KB   |  2 & 3   |  1 & 2   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  256KB   |  2 & 3   |  2 & 3   |  2 & 3  | 1 & 2  | 2 & 3  |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Type   |   W12    |   W13    |   W14   |   W16   |  W17  |
   |----------+----------+----------+---------+---------+-------|
   | 80486SX  |   Open   |   Open   |  2 & 3  | Closed  | Open  |
   |----------+----------+----------+---------+---------+-------|
   | 80487SX  |  Closed  |  Closed  |  1 & 2  | Closed  | 2 & 3 |
   |----------+----------+----------+---------+---------+-------|
   | 80486DX  |  Closed  |  Closed  |  1 & 2  | Closed  | 1 & 2 |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+