JPN CORPORATION
===============

   MB386SX

                                                                  
   Processor           80386SX                                    
   Processor Speed     16/20/25MHz                                
   Chip Set            VLSI                                       
   Max. Onboard DRAM   4MB                                        
   Cache               None                                       
   BIOS                AMI                                        
   Dimensions          220mm x 220mm                              
   I/O Options         None                                       
   NPU Options         80387SX                                    
                                                                  

<gopher://bitreich.org/I/th99/m/I-L/30030-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location  | Purpose      | Location  |
   |---------------------+-----------+--------------+-----------|
   | Speaker             |   JP20    | Turbo switch |   JP52    |
   |---------------------+-----------+--------------+-----------|
   | Power LED & keylock |   JP30    | Turbo LED    |   JP56    |
   |---------------------+-----------+--------------+-----------|
   | Reset switch        |   JP51    |              |           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Pipeline mode enabled            |  JP10  |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Pipeline mode disabled           |  JP10  |    open    |
   |---+----------------------------------+--------+------------|
   |>> | BIOS type select 27256           |  JP23  |    open    |
   |   |                                  |        |            |
   |   |                                  |  JP24  |   closed   |
   |---+----------------------------------+--------+------------|
   |   | BIOS type select 27128           |  JP23  |    open    |
   |   |                                  |        |            |
   |   |                                  |  JP24  |    open    |
   |---+----------------------------------+--------+------------|
   |   | BIOS type select 27512           |  JP23  |   closed   |
   |   |                                  |        |            |
   |   |                                  |  JP24  |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Parity check enabled             |  JP25  |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Parity check disabled            |  JP25  |    open    |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP31  |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP31  |    open    |
   |---+----------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP55  | pins 1 & 2 |
   |   | board                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP55  | pins 2 & 3 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP58  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP58  | pins 3 & 4 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP59  |    N/A     |
   |   | alter                            |        |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  | Bank 0 | Parity | Bank 1 | Parity | Bank 2 | Bank  |
   |       |        | (P-0)  |        | (P-1)  |        |   3   |
   |-------+--------+--------+--------+--------+--------+-------|
   | 512KB |  (4)   |  (2)   |  NONE  |  NONE  |  NONE  | NONE  |
   |       | 44256  | 41256  |        |        |        |       |
   |-------+--------+--------+--------+--------+--------+-------|
   |  1MB  |  (4)   |  (2)   |  (4)   |  (2)   |  NONE  | NONE  |
   |       | 44256  | 41256  | 44256  | 41256  |        |       |
   |-------+--------+--------+--------+--------+--------+-------|
   | 1.5MB |  (4)   |  (2)   |  (4)   |  (2)   |  (2)   | NONE  |
   |       | 44256  | 41256  | 44256  | 41256  | 256K x |       |
   |       |        |        |        |        |   9    |       |
   |-------+--------+--------+--------+--------+--------+-------|
   |  2MB  |  (4)   |  (2)   |  (4)   |  (2)   |  (2)   |  (2)  |
   |       | 44256  | 41256  | 44256  | 41256  | 256K x | 256K  |
   |       |        |        |        |        |   9    |  x 9  |
   |-------+--------+--------+--------+--------+--------+-------|
   |  2MB  |  NONE  |  NONE  |  NONE  |  NONE  | (2) 1M | NONE  |
   |       |        |        |        |        |  x 9   |       |
   |-------+--------+--------+--------+--------+--------+-------|
   |  3MB  |  (4)   |  (2)   |  (4)   |  (2)   | (2) 1M | NONE  |
   |       | 44256  | 41256  | 44256  | 41256  |  x 9   |       |
   |-------+--------+--------+--------+--------+--------+-------|
   |  4MB  |  NONE  |  NONE  |  NONE  |  NONE  | (2) 1M |  (2)  |
   |       |        |        |        |        |  x 9   | 1M x  |
   |       |        |        |        |        |        |   9   |
   +------------------------------------------------------------+