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

   386DX W/B

   Processor         80386DX/CX486DLC                             
   Processor Speed   33/40MHz                                     
   Chip Set          OPTI                                         
   Max. Onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        254mm x 218mm                                
   I/O Options       None                                         
   NPU Options       CX487DLC                                     

<gopher://bitreich.org/I/th99/m/U-Z/32792-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | External battery    |    J1    | Turbo switch   |   JP11   |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |   J18    | Turbo LED      |   JP12   |
   |---------------------+----------+----------------+----------|
   | Speaker             |   J19    | Reset switch   |   SW1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP3   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP3   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP4   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP4   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | CPU clock type select single     |  JP7   | pins 2 & 3 |
   |   | phase                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CPU clock type select double     |  JP7   | pins 1 & 2 |
   |   | phase                            |        |   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     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M 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  |  (1) 32K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |  JP6   |  JP8   |  JP9   | JP10  |  JP17  |  JP18  |
   |-------+--------+--------+--------+-------+--------+--------|
   | 64KB  |  Open  |  Open  |  Open  | 2 & 3 |  Open  |  Open  |
   |-------+--------+--------+--------+-------+--------+--------|
   | 128KB | Closed | Closed |  Open  | 1 & 2 |  Open  | Closed |
   |-------+--------+--------+--------+-------+--------+--------|
   | 256KB | Closed | Closed | Closed | 2 & 3 | Closed | Closed |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |     Type     |      JP1      |     JP5      |     JP13     |
   |--------------+---------------+--------------+--------------|
   |    Cyrix     |    Closed     |    Closed    |    Closed    |
   |--------------+---------------+--------------+--------------|
   |    Intel     |     Open      |     Open     |     Open     |
   |------------------------------------------------------------|
   | Note: The location of JP1 is unidentified.                 |
   +------------------------------------------------------------+