(TXT) View Source
       
       # ZENITH DATA SYSTEMS
       
          Z-2500 SERIES
       
          Processor              80286                                   
          Processor Speed        12MHz                                   
          Chip Set               Unidentified                            
          Video Chip Set         None                                    
          Maximum Onboard Memory 6MB                                     
          Maximum Video Memory   None                                    
          Cache                  None                                    
          BIOS                   Unidentified                            
          Dimensions             330mm x 218mm                           
          I/O Options            None                                    
          NPU Options            80287                                   
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function               | Label |   Position   |
          |-------------------------------------+-------+--------------|
          | » | Factory configured - do not     | J101  |     Open     |
          |   | alter                           |       |              |
          |---+---------------------------------+-------+--------------|
          | » | NPU clock mode select mode /3   | J103  |    Closed    |
          |   | for 80287, /2 for 80C287        |       |              |
          |---+---------------------------------+-------+--------------|
          |   | NPU clock mode select direct    | J103  |     Open     |
          |   | mode                            |       |              |
          |---+---------------------------------+-------+--------------|
          |   | Parallel printer decode         | J106  | Unidentified |
          |---+---------------------------------+-------+--------------|
          | » | ROM DMA blocked                 | J113  |  Pins 1 & 2  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          |   | ROM DMA not blocked             | J113  |  Pins 2 & 3  |
          |   |                                 |       |    closed    |
          |---+---------------------------------+-------+--------------|
          | » | Speaker enabled                 | J114  |    Closed    |
          |---+---------------------------------+-------+--------------|
          |   | Speaker disabled                | J114  |     Open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       1MB        |    (4) 256K x 9    |        None        |
          |------------------+--------------------+--------------------|
          |       3MB        |    (4) 256K x 9    |     (2) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       6MB        |     (4) 1M x 9     |     (2) 1M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DRAM TYPE SELECTION                     |
          |------------------------------------------------------------|
          |             Type              |            J102            |
          |-------------------------------+----------------------------|
          |      256K x 9 in Bank 0       |     Pins 2 & 3 closed      |
          |-------------------------------+----------------------------|
          |     1M x 9 in Banks 0 & 1     |     Pins 1 & 2 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    SCP SPEED SELECTION                     |
          |------------------------------------------------------------|
          |           Speed            |             P113              |
          |----------------------------+-------------------------------|
          |   |        7.16MHz         |       Pins 1 & 2 closed       |
          |---+------------------------+-------------------------------|
          | » |          8MHz          |       Pins 5 & 6 closed       |
          |---+------------------------+-------------------------------|
          |   |         12MHz          |       Pins 3 & 4 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    NPU SPEED SELECTION                     |
          |------------------------------------------------------------|
          |  Clock speed   |  80287   |  80C287  |        P113         |
          |----------------+----------+----------+---------------------|
          |    |   8MHz    |  2.7MHz  |   4MHz   | Pins 9 & 10 closed  |
          |----+-----------+----------+----------+---------------------|
          | »  |   16MHz   |  5.3MHz  |   8MHz   | Pins 13 & 14 closed |
          |----+-----------+----------+----------+---------------------|
          |    |   24MHz   |   8MHz   |   12Hz   |  Pins 7 & 8 closed  |
          |------------------------------------------------------------|
          | Note: See also J103 setting.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      POACH SELECTION                       |
          |------------------------------------------------------------|
          |             Setting              |    J115    |    J116    |
          |----------------------------------+------------+------------|
          | » |  POACH 1 chip installed in   | Pins 2 & 3 | Pins 2 & 3 |
          |   |             U169             |   closed   |   closed   |
          |---+------------------------------+------------+------------|
          |   |  POACH 7 chip installed in   | Pins 1 & 2 | Pins 1 & 2 |
          |   |             U169             |   closed   |   closed   |
          +------------------------------------------------------------+