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

   UM 386SX

   Processor             80386SX                                  
   Processor Speed       16/20/24MHz                              
   Chip Set              UMC                                      
   Max. Onboard DRAM     5MB                                      
   Cache                 None                                     
   BIOS                  AMI                                      
   Dimensions            221mm x 216mm                            
   I/O Options           None                                     
   NPU Options           80387SX                                  

<gopher://bitreich.org/I/th99/m/U-Z/30428-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Speaker          |    J1    | Turbo switch      |    J5    |
   |------------------+----------+-------------------+----------|
   | Power LED &      |    J2    | External battery  |    J6    |
   | keylock          |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Reset switch     |    J3    | Auxiliary         |   JP2    |
   |                  |          | keyboard          |          |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |    J4    |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper  | Position  |
   |--------------------------------------+---------+-----------|
   |>> | Monitor type select color        |   JP3   |  Closed   |
   |---+----------------------------------+---------+-----------|
   |   | Monitor type select monochrome   |   JP3   |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  | Bank 0 |  Parity  | Bank 1 | Parity | Bank  | Bank |
   |       |        |  (P-0)   |        | (P-1)  |   2   |  3   |
   |-------+--------+----------+--------+--------+-------+------|
   | 512KB |  (4)   |   (2)    |  NONE  |  NONE  | NONE  | NONE |
   |       | 44256  |  41256   |        |        |       |      |
   |-------+--------+----------+--------+--------+-------+------|
   | 512KB |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | NONE |
   |       |        |          |        |        | 256K  |      |
   |       |        |          |        |        |  x 9  |      |
   |-------+--------+----------+--------+--------+-------+------|
   |  1MB  |  (4)   |   (2)    |  (4)   |  (2)   | NONE  | NONE |
   |       | 44256  |  41256   | 44256  | 41256  |       |      |
   |-------+--------+----------+--------+--------+-------+------|
   |  1MB  |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | (2)  |
   |       |        |          |        |        | 256K  | 256K |
   |       |        |          |        |        |  x 9  | x 9  |
   |-------+--------+----------+--------+--------+-------+------|
   |  2MB  |  (4)   |   (2)    |  (4)   |  (2)   |  (2)  | (2)  |
   |       | 44256  |  41256   | 44256  | 41256  | 256K  | 256K |
   |       |        |          |        |        |  x 9  | x 9  |
   |-------+--------+----------+--------+--------+-------+------|
   |  2MB  |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | NONE |
   |       |        |          |        |        | 1M x  |      |
   |       |        |          |        |        |   9   |      |
   |-------+--------+----------+--------+--------+-------+------|
   |  3MB  |  (4)   |   (2)    |  (4)   |  (2)   |  (2)  | NONE |
   |       | 44256  |  41256   | 44256  | 41256  | 1M x  |      |
   |       |        |          |        |        |   9   |      |
   |-------+--------+----------+--------+--------+-------+------|
   |  4MB  |  NONE  |   NONE   |  NONE  |  NONE  |  (2)  | (2)  |
   |       |        |          |        |        | 1M x  | 1M x |
   |       |        |          |        |        |   9   |  9   |
   |-------+--------+----------+--------+--------+-------+------|
   |  5MB  |  (4)   |   (2)    |  (4)   |  (2)   |  (2)  | (2)  |
   |       | 44256  |  41256   | 44256  | 41256  | 1M x  | 1M x |
   |       |        |          |        |        |   9   |  9   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Size  |                        JP1                        |
   |--------+---------------------------------------------------|
   | 512KB  |   pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14,    |
   |        |         15&16, 17&18, 19&20, 21&22, 23&24         |
   |--------+---------------------------------------------------|
   | 512KB  |   pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15,    |
   |        |         14&16, 17&19, 18&20, 21&23, 22&24         |
   |--------+---------------------------------------------------|
   |  1MB   |   pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14,    |
   |        |         15&16, 17&18, 19&20, 21&22, 23&24         |
   |--------+---------------------------------------------------|
   |  1MB   |   pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15,    |
   |        |         14&16, 17&19, 18&20, 21&23, 22&24         |
   |--------+---------------------------------------------------|
   |  2MB   |   pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14,    |
   |        |         15&16, 17&18, 19&20, 21&22, 23&24         |
   |--------+---------------------------------------------------|
   |  2MB   |   pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15,    |
   |        |         14&16, 17&19, 18&20, 21&23, 22&24         |
   |--------+---------------------------------------------------|
   |  3MB   |   pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14,    |
   |        |         15&16, 17&18, 19&20, 21&22, 23&24         |
   |--------+---------------------------------------------------|
   |  4MB   |   pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15,    |
   |        |         14&16, 17&19, 18&20, 21&23, 22&24         |
   |--------+---------------------------------------------------|
   |  5MB   |   pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14,    |
   |        |         15&16, 17&18, 19&20, 21&22, 23&24         |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM PARITY CONFIGURATION                  |
   |------------------------------------------------------------|
   |      Setting       |        JP4        |        JP5        |
   |--------------------+-------------------+-------------------|
   |      Enabled       |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |      Disabled      |       Open        |       Open        |
   +------------------------------------------------------------+