POLOTEC, INC.
=============

   MBA-503B

   Processor             80386DX/CX486DLC                         
   Processor Speed       25/33/40MHz                              
   Chip Set              Micronics                                
   Max. Onboard DRAM     32MB                                     
   SRAM Cache            None                                     
   BIOS                  AMI                                      
   Dimensions            220mm x 220mm                            
   I/O Options           None                                     
   NPU Options           80387/3167                               

<gopher://bitreich.org/I/th99/m/P-R/31270-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |    D4    | Reset switch      |    J5    |
   |------------------+----------+-------------------+----------|
   | External battery |    J3    | Speaker           |    J6    |
   |------------------+----------+-------------------+----------|
   | Parallel port    |    J4    | Power LED &       |    J7    |
   |                  |          | keylock           |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | RTC type select 146818         |  JP1   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |   |                                |  JP3   |              |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | RTC type select DS1287         |  JP1   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |   |                                |  JP3   |              |
   |   |                                |        |     open     |
   |---+--------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  JP2   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  JP2   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select color      |  JP4   |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome |  JP4   |     open     |
   |---+--------------------------------+--------+--------------|
   |   | NPU select 80387               |  JP5   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | NPU select 3167 or none        |  JP5   |  pins 2 & 3  |
   |   |                                |        |    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) 1M x 9     |    (4) 256K 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     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+