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       # EVEREX SYSTEMS, INC.
       
          STEP 286/20 (EV-1820)
       
          Processor             80286                                    
          Processor Speed       20MHz                                    
          Chip Set              Everex                                   
          Max. Onboard DRAM     4MB                                      
          SRAM Cache            32/64/128KB                              
          BIOS                  Everex                                   
          Dimensions            330mm x 218mm                            
          I/O Options           32-bit external memory card slot         
          NPU Options           80287                                    
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose                   | Location | Purpose  | Location |
          |---------------------------+----------+----------+----------|
          | External memory card slot |    S1    |          |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Size   |     Bank 0      |  Bank 1  |  Bank 2  |  Bank 3  |
          |---------+-----------------+----------+----------+----------|
          |  512KB  |   (18) 41256    |   NONE   |   NONE   |   NONE   |
          |---------+-----------------+----------+----------+----------|
          |   1MB   |   (18) 41256    |   (18)   |   NONE   |   NONE   |
          |         |                 |  41256   |          |          |
          |---------+-----------------+----------+----------+----------|
          |   2MB   |   (18) 41256    |   (18)   |   (18)   |   (18)   |
          |         |                 |  41256   |  41256   |  41256   |
          |---------+-----------------+----------+----------+----------|
          |   2MB   |   (18) 411000   |   NONE   |   NONE   |   NONE   |
          |---------+-----------------+----------+----------+----------|
          |   4MB   |   (18) 411000   |   (18)   |   NONE   |   NONE   |
          |         |                 |  411000  |          |          |
          |---------+-----------------+----------+----------+----------|
          |   8MB   |   (18) 411000   |   (18)   |   (18)   |   (18)   |
          |         |                 |  411000  |  411000  |  411000  |
          |------------------------------------------------------------|
          | Note:Banks 2 and 3 are utilized when a 32-bit external     |
          | memory card is installed at S1.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |     Cache SRAM     |      Location      |
          |------------------+--------------------+--------------------|
          |       32KB       |     (4) 8K x 8     |       Bank 0       |
          |------------------+--------------------+--------------------|
          |       64KB       |     (8) 8K x 8     |    Banks 0 & 1     |
          |------------------+--------------------+--------------------|
          |      128KB       |    (4) 32K x 8     |       Bank 0       |
          +------------------------------------------------------------+