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       # ZENITH DATA SYSTEMS
       
          Z-386/20
       
          Processor         80386                                        
          Processor Speed   20/25MHz                                     
          Chip Set          Unidentified                                 
          Max. Onboard DRAM 32MB                                         
          Cache             64KB                                         
          BIOS              Unidentified                                 
          Dimensions        330mm x 218mm                                
          I/O Options       External cache card                          
          NPU Options       80387DX/3167                                 
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | Chassis fan      | FAN      | External cache    | SL1      |
          | power            |          | slot              |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function              | Jumper |   Position    |
          |-----------------------------------+--------+---------------|
          | » | NPU enabled                   |  J101  |  pins 1 & 2   |
          |   |                               |        |    closed     |
          |---+-------------------------------+--------+---------------|
          |   | NPU disabled                  |  J101  |  pins 2 & 3   |
          |   |                               |        |    closed     |
          |---+-------------------------------+--------+---------------|
          | » | CPU clock speed select 20 MHz |  J102  |  pins 1 & 2   |
          |   |                               |        |    closed     |
          |---+-------------------------------+--------+---------------|
          |   | CPU clock speed select 25 MHz |  J102  |  pins 2 & 3   |
          |   |                               |        |    closed     |
          |---+-------------------------------+--------+---------------|
          | » | NPU synchronous with CPU      |  J103  |  pins 1 & 2   |
          |   |                               |        |    closed     |
          |---+-------------------------------+--------+---------------|
          |   | NPU asynchronous with CPU     |  J103  |  pins 2 & 3   |
          |   |                               |        |    closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |Size|Bank 0|Bank 1|Bank 2|Bank 3|Bank 4|Bank 5|Bank 6|Bank 7|
          |----+------+------+------+------+------+------+------+------|
          |1MB |(1) 1M| NONE | NONE | NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |1MB | (1)  | (1)  | (1)  | (1)  | NONE | NONE | NONE | NONE |
          |    | 256K | 256K | 256K | 256K |      |      |      |      |
          |----+------+------+------+------+------+------+------+------|
          |2MB |(1) 1M|(1) 1M| NONE | NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |2MB |(1) 1M| (1)  | (1)  | (1)  | (1)  | NONE | NONE | NONE |
          |    |      | 256K | 256K | 256K | 256K |      |      |      |
          |----+------+------+------+------+------+------+------+------|
          |2MB | (1)  | (1)  | (1)  | (1)  | (1)  | (1)  | (1)  | (1)  |
          |    | 256K | 256K | 256K | 256K | 256K | 256K | 256K | 256K |
          |----+------+------+------+------+------+------+------+------|
          |3MB |(1) 1M|(1) 1M| (1)  | (1)  | (1)  | (1)  | NONE | NONE |
          |    |      |      | 256K | 256K | 256K | 256K |      |      |
          |----+------+------+------+------+------+------+------+------|
          |3MB |(1) 1M|(1) 1M|(1) 1M| NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |4MB |(1) 4M| NONE | NONE | NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |4MB |(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |4MB |(1) 1M|(1) 1M|(1) 1M| (1)  | (1)  | (1)  | (1)  | NONE |
          |    |      |      |      | 256K | 256K | 256K | 256K |      |
          |----+------+------+------+------+------+------+------+------|
          |5MB |(1) 4M|(1) 1M| NONE | NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |5MB |(1) 4M| (1)  | (1)  | (1)  | (1)  | NONE | NONE | NONE |
          |    |      | 256K | 256K | 256K | 256K |      |      |      |
          |----+------+------+------+------+------+------+------+------|
          |5MB |(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |5MB |(1) 1M|(1) 1M|(1) 1M|(1) 1M| (1)  | (1)  | (1)  | (1)  |
          |    |      |      |      |      | 256K | 256K | 256K | 256K |
          |----+------+------+------+------+------+------+------+------|
          |6MB |(1) 4M|(1) 1M|(1) 1M| NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |6MB |(1) 4M|(1) 1M| (1)  | (1)  | (1)  | (1)  | NONE | NONE |
          |    |      |      | 256K | 256K | 256K | 256K |      |      |
          |----+------+------+------+------+------+------+------+------|
          |6MB |(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |7MB |(1) 4M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |7MB |(1) 4M|(1) 1M|(1) 1M| (1)  | (1)  | (1)  | (1)  | NONE |
          |    |      |      |      | 256K | 256K | 256K | 256K |      |
          |----+------+------+------+------+------+------+------+------|
          |7MB |(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |8MB |(1) 4M|(1) 4M| NONE | NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |8MB |(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |8MB |(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |9MB |(1) 4M|(1) 4M|(1) 1M| NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |9MB |(1) 4M|(1) 4M| (1)  | (1)  | (1)  | (1)  | NONE | NONE |
          |    |      |      | 256K | 256K | 256K | 256K |      |      |
          |----+------+------+------+------+------+------+------+------|
          |9MB |(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |10MB|(1) 4M|(1) 4M|(1) 1M|(1) 1M| NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |10MB|(1) 4M|(1) 4M|(1) 1M| (1)  | (1)  | (1)  | (1)  | NONE |
          |    |      |      |      | 256K | 256K | 256K | 256K |      |
          |----+------+------+------+------+------+------+------+------|
          |10MB|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |11MB|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |11MB|(1) 4M|(1) 4M|(1) 1M|(1) 1M| (1)  | (1)  | (1)  | (1)  |
          |    |      |      |      |      | 256K | 256K | 256K | 256K |
          |----+------+------+------+------+------+------+------+------|
          |11MB|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |12MB|(1) 4M|(1) 4M|(1) 4M| NONE | NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |12MB|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE |
          |------------------------------------------------------------|
          |Note:All DRAM SIMMs are 9 bit.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DRAM CONFIGURATION CON’T                  |
          |------------------------------------------------------------|
          |Size|Bank 0|Bank 1|Bank 2|Bank 3|Bank 4|Bank 5|Bank 6|Bank 7|
          |----+------+------+------+------+------+------+------+------|
          |13MB|(1) 4M|(1) 4M|(1) 4M|(1) 1M| NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |13MB|(1) 4M|(1) 4M|(1) 4M| (1)  | (1)  | (1)  | (1)  | NONE |
          |    |      |      |      | 256K | 256K | 256K | 256K |      |
          |----+------+------+------+------+------+------+------+------|
          |13MB|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |14MB|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M| NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |14MB|(1) 4M|(1) 4M|(1) 4M|(1) 1M| (1)  | (1)  | (1)  | (1)  |
          |    |      |      |      |      | 256K | 256K | 256K | 256K |
          |----+------+------+------+------+------+------+------+------|
          |14MB|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |15MB|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M| NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |16MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M| NONE | NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |16MB|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |17MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M| NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |17MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M| (1)  | (1)  | (1)  | (1)  |
          |    |      |      |      |      | 256K | 256K | 256K | 256K |
          |----+------+------+------+------+------+------+------+------|
          |17MB|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |18MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M| NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |19MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |20MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M| NONE | NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |20MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |21MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M| NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |22MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |23MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |24MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M| NONE | NONE |
          |----+------+------+------+------+------+------+------+------|
          |25MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |26MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |28MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M| NONE |
          |----+------+------+------+------+------+------+------+------|
          |29MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 1M|
          |----+------+------+------+------+------+------+------+------|
          |32MB|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|(1) 4M|
          |------------------------------------------------------------|
          |Note:All DRAM SIMMs are 9 bit.                              |
          +------------------------------------------------------------+