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

   386XM-20/OP

   Processor         80386SX                                      
   Processor Speed   20/25MHz                                     
   Chip Set          OPTI                                         
   Max. Onboard DRAM 8MB                                          
   Cache             16/32/64KB                                   
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       80387SX                                      

<gopher://bitreich.org/I/th99/m/U-Z/32209-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | External battery    |    J1    | Turbo LED      |   JP8    |
   |---------------------+----------+----------------+----------|
   | Speaker             |   J21    | Reset switch   |    S2    |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |   J22    | Turbo switch   |    S3    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  JP1   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  JP1   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select monochrome |  JP2   |     Open     |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select color      |  JP2   |    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        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |       16KB       |    (4) 16K x 1     |     (2) 4K x 4     |
   |------------------+--------------------+--------------------|
   |       32KB       |     (4) 4K x 1     |     (2) 4K x 4     |
   |------------------+--------------------+--------------------|
   |       64KB       |    (4) 32K x 1     |     (2) 4K x 4     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size   |   JP3    |   JP4    |  JP5   |   JP6   |   JP7   |
   |---------+----------+----------+--------+---------+---------|
   |  16KB   |  1 & 2   |  1 & 2   | 1 & 2  |  Open   |  Open   |
   |---------+----------+----------+--------+---------+---------|
   |  32KB   |  2 & 3   |  1 & 2   | 1 & 2  | Closed  |  Open   |
   |---------+----------+----------+--------+---------+---------|
   |  64KB   |  2 & 3   |  2 & 3   | 2 & 3  |  Open   | Closed  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+