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

   MBVLSI-168 B

   Processor         80286                                        
   Processor Speed   12MHz                                        
   Chip Set          VLSI                                         
   Max. onboard DRAM 4MB                                          
   Cache             None                                         
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       80287                                        

<gopher://bitreich.org/I/th99/m/U-Z/31639-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Reset switch      |   JP1    | Turbo Switch     |   JP4    |
   |-------------------+----------+------------------+----------|
   | Power LED &       |   JP2    | Turbo LED        |   JP5    |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |   JP3    | External battery |   JP17   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | Memory speed select - do  |      JP6      |    N/A     |
   |   | not alter                 |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Wait state select 0 wait  |     JP10      |   Closed   |
   |   | states                    |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Wait state select 1 wait  |     JP10      |    Open    |
   |   | state                     |               |            |
   |---+---------------------------+---------------+------------|
   |>> | BIOS type select 27256    |     JP11      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | BIOS type select 27128    |     JP11      | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Monitor type select color |     JP12      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select       |     JP12      | pins 2 & 3 |
   |   | monochrome                |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Power good detect - do    |     JP16      |    N/A     |
   |   | not alter                 |               |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |Size | Bank 0  |Parity 0|Bank 1 |Parity| JP7  | JP8  | JP9  |
   |     |         |        |       |  2   |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   |512KB|(4) 44256|  (2)   | NONE  | NONE |Closed|Closed|Closed|
   |     |         | 41256  |       |      |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   |640KB|(4) 44256|  (2)   |  (4)  | (2)  |Closed|Closed| Open |
   |     |         | 41256  | 4464  | 4164 |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   |640KB|(4) 44256|  (2)   | (16)  | (2)  |Closed|Closed| Open |
   |     |         | 41256  | 4164  | 4164 |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   | 1MB |(4) 44256|  (2)   |  (4)  | (2)  |Closed| Open |Closed|
   |     |         | 41256  | 44256 | 4164 |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   | 1MB |(4) 44256|  (2)   | (16)  | (2)  |Closed| Open |Closed|
   |     |         | 41256  | 4164  | 4164 |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   | 2MB |  (18)   |  NONE  | NONE  | NONE |Closed| Open | Open |
   |     | 411000  |        |       |      |      |      |      |
   |-----+---------+--------+-------+------+------+------+------|
   | 4MB |  (18)   |  NONE  | (18)  | NONE | Open |Closed|Closed|
   |     | 411000  |        |411000 |      |      |      |      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             KEYBOARD CONTROLLER CONFIGURATION              |
   |------------------------------------------------------------|
   |  Pin Number  |   JP13    |   JP14    |   JP15   |   JP18   |
   |--------------+-----------+-----------+----------+----------|
   |      23      |   Open    |  Closed   |   Open   |   Open   |
   |--------------+-----------+-----------+----------+----------|
   |      27      |   Open    |   Open    |  Closed  |   Open   |
   |--------------+-----------+-----------+----------+----------|
   |      30      |  Closed   |   Open    |   Open   |   Open   |
   |--------------+-----------+-----------+----------+----------|
   |      32      |   Open    |   Open    |   Open   |  Closed  |
   |------------------------------------------------------------|
   | Note:Make sure that the BIOS and the keyboard controller   |
   | are compatible before shorting a controller  pin for speed |
   | change via software.                                       |
   +------------------------------------------------------------+