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

   TURBO MAINBOARD

   Processor              8088                                    
   Processor Speed        4.77/8MHz                               
   Chip Set               Unidentified                            
   Video Chip Set         None                                    
   Maximum Onboard Memory 640KB                                   
   Maximum Video Memory   None                                    
   Cache                  None                                    
   BIOS                   Unidentified                            
   Dimensions             330mm x 218mm                           
   I/O Options            None                                    
   NPU Options            8087                                    

<gopher://bitreich.org/I/th99/m/U-Z/33656-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose              | Location | Purpose       | Location |
   |----------------------+----------+---------------+----------|
   | Operating mode       |    P3    | Keyboard      |    P5    |
   | interface            |          | connector     |          |
   |----------------------+----------+---------------+----------|
   | Speaker              |    P4    | Reset switch  |   SW2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Label | Position  |
   |----------------------------------------+-------+-----------|
   |   | I/O address is C0H (bit 0 low =    |  E1   | Pins 1 &  |
   |   | turbo mode; high = normal mode)    |       | 2 closed  |
   |---+------------------------------------+-------+-----------|
   |   | I/O address is 061H (bit 2 low =   |  E1   | Pins 2 &  |
   |   | turbo mode; high = normal mode)    |       | 3 closed  |
   |---+------------------------------------+-------+-----------|
   |   | CPU changes speed during disk      |  E6   |  Closed   |
   |   | drive access                       |       |           |
   |---+------------------------------------+-------+-----------|
   |   | CPU does not change speed during   |  E6   |   Open    |
   |   | disk drive access                  |       |           |
   |---+------------------------------------+-------+-----------|
   |   | Boot memory test enabled           | SW1/1 |    On     |
   |---+------------------------------------+-------+-----------|
   |   | Boot memory test disabled          | SW1/1 |    Off    |
   |---+------------------------------------+-------+-----------|
   |   | NPU not installed                  | SW1/2 |    On     |
   |---+------------------------------------+-------+-----------|
   |   | NPU installed                      | SW1/2 |    Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size   |   Bank 0   |   Bank 1   |   Bank 2   |  Bank 3   |
   |---------+------------+------------+------------+-----------|
   |  64KB   |  (9) 4164  |    None    |    None    |   None    |
   |---------+------------+------------+------------+-----------|
   |  128KB  |  (9) 4164  |  (9) 4164  |    None    |   None    |
   |---------+------------+------------+------------+-----------|
   |  192KB  |  (9) 4164  |  (9) 4164  |  (9) 4164  |   None    |
   |---------+------------+------------+------------+-----------|
   |  256KB  |  (9) 4164  |  (9) 4164  |  (9) 4164  | (9) 4164  |
   |---------+------------+------------+------------+-----------|
   |  256KB  | (9) 41256  |    None    |    None    |   None    |
   |---------+------------+------------+------------+-----------|
   |  512KB  | (9) 41256  | (9) 41256  |    None    |   None    |
   |---------+------------+------------+------------+-----------|
   |  576KB  | (9) 41256  | (9) 41256  |  (9) 4164  |   None    |
   |---------+------------+------------+------------+-----------|
   |  640KB  | (9) 41256  | (9) 41256  |  (9) 4164  | (9) 4164  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              DRAM JUMPER/SWITCH CONFIGURATION              |
   |------------------------------------------------------------|
   |     Size      |      E4       |    SW1/3     |    SW1/4    |
   |---------------+---------------+--------------+-------------|
   |     64KB      |     Open      |      On      |     On      |
   |---------------+---------------+--------------+-------------|
   |     128KB     |     Open      |     Off      |     On      |
   |---------------+---------------+--------------+-------------|
   |     192KB     |     Open      |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |     256KB     |     Open      |     Off      |     Off     |
   |---------------+---------------+--------------+-------------|
   |     256KB     |    Closed     |      On      |     On      |
   |---------------+---------------+--------------+-------------|
   |     512KB     |    Closed     |     Off      |     On      |
   |---------------+---------------+--------------+-------------|
   |     576KB     |    Closed     |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |     640KB     |    Closed     |     Off      |     Off     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   FLOPPY DRIVE SELECTION                   |
   |------------------------------------------------------------|
   |  Drives installed  |       SW1/7       |       SW1/8       |
   |--------------------+-------------------+-------------------|
   |         1          |        On         |        On         |
   |--------------------+-------------------+-------------------|
   |         2          |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |         3          |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |         4          |        Off        |        Off        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     MONITOR SELECTION                      |
   |------------------------------------------------------------|
   |        Type        |       SW1/5       |       SW1/6       |
   |--------------------+-------------------+-------------------|
   |        None        |        On         |        On         |
   |--------------------+-------------------+-------------------|
   |  Color (80 x 25)   |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |  Color (40 x 25)   |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |     Monochrome     |        Off        |        Off        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       ROM SELECTION                        |
   |------------------------------------------------------------|
   |   U25 address   |   U26 address    |    E2     |    E3     |
   |-----------------+------------------+-----------+-----------|
   | F6000H - FDFFFH | FE000H - FFFFFH  |  Closed   |  Closed   |
   |-----------------+------------------+-----------+-----------|
   | F4000H - FBFFFH | FC0000H - FFFFFH |  Closed   |   Open    |
   |-----------------+------------------+-----------+-----------|
   | F0000H - F7FFFH | F8000H - FFFFFH  |   Open    |   Open    |
   +------------------------------------------------------------+