DATAEXPERT CORPORATION
======================

   OPTI-486WB

   Processor             80486SX/80486DX                          
   Processor Speed       25/33MHz                                 
   Chip Set              OPTI                                     
   Max. Onboard DRAM     32MB                                     
   Cache                 64/128/256/512KB                         
   BIOS                  AMI                                      
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/C-D/30713-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose         | Location  | Purpose           | Location |
   |-----------------+-----------+-------------------+----------|
   | Speaker         |    J1     | Reset switch      |    J4    |
   |-----------------+-----------+-------------------+----------|
   | Turbo switch    |    J2     | External battery  |   J22    |
   |-----------------+-----------+-------------------+----------|
   | Power LED &     |    J3     | Turbo LED         |   JP1    |
   | keylock         |           |                   |          |
   |------------------------------------------------------------|
   | Note:On some board revisions, JP1, J2, and J4 are aligned  |
   | to the left of the NPU.                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  J22   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  J22   |  pins 3 & 4  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select color      |  JP12  |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |  JP12  |     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         |
   |----------------+---------------------+---------------------|
   |      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 (U34)  | TAG (U35)  |
   |-------+-------------+------------+------------+------------|
   | 64KB  | (8) 8K x 8  |    NONE    | (1) 8K x 8 | (1) 64K x  |
   |       |             |            |            |     1      |
   |-------+-------------+------------+------------+------------|
   | 128KB | (8) 8K x 8  | (8) 8K x 8 | (1) 8K x 8 | (1) 64K x  |
   |       |             |            |            |     1      |
   |-------+-------------+------------+------------+------------|
   | 256KB | (8) 32K x 8 |    NONE    | (1) 32K x  | (1) 64K x  |
   |       |             |            |     8      |     1      |
   |-------+-------------+------------+------------+------------|
   | 512KB | (8) 32K x 8 | (8) 32K x  | (1) 32K x  | (1) 64K x  |
   |       |             |     8      |     8      |     1      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size   |   JP6    |   JP7   |   JP8    |   JP9   |  JP10  |
   |---------+----------+---------+----------+---------+--------|
   |  64KB   |   Open   |  2 & 3  |   Open   |  Open   |  Open  |
   |---------+----------+---------+----------+---------+--------|
   |  128KB  |  Closed  |  2 & 3  |   Open   |  Open   | Closed |
   |---------+----------+---------+----------+---------+--------|
   |  256KB  |  Closed  |  2 & 3  |   Open   | Closed  | Closed |
   |---------+----------+---------+----------+---------+--------|
   |  512KB  |  Closed  |  1 & 2  |  Closed  | Closed  | Closed |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   | TAG (U34)  | TAG (U35)  |
   |-------+-------------+------------+------------+------------|
   | 64KB  | (8) 8K x 8  |    NONE    | (1) 8K x 8 | (1) 64K x  |
   |       |             |            |            |     1      |
   |-------+-------------+------------+------------+------------|
   | 128KB | (8) 8K x 8  | (8) 8K x 8 | (1) 8K x 8 | (1) 64K x  |
   |       |             |            |            |     1      |
   |-------+-------------+------------+------------+------------|
   | 256KB | (8) 32K x 8 |    NONE    | (1) 32K x  | (1) 64K x  |
   |       |             |            |     8      |     1      |
   |-------+-------------+------------+------------+------------|
   | 512KB | (8) 32K x 8 | (8) 32K x  | (1) 32K x  | (1) 64K x  |
   |       |             |     8      |     8      |     1      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Type   |        JP2        |        JP3        |   JP4   |
   |----------+-------------------+-------------------+---------|
   | 80486SX  |       Open        | pins 1 & 2 closed |  Open   |
   |----------+-------------------+-------------------+---------|
   | 80486DX  | pins 1 & 2 closed | pins 2 & 3 closed | Closed  |
   +------------------------------------------------------------+