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       # EVEREX SYSTEMS, INC.
       
          STEP 386CX
       
          Processor        80286/80386SX                                 
          Processor Speed  Unidentified                                  
          Chip Set         Unidentified                                  
          Video Chip Set   None                                          
          Maximum Onboard  8MB                                           
          Memory           
          Maximum Video    None                                          
          Memory           
          Cache            None                                          
          BIOS             Unidentified                                  
          Dimensions       254mm x 218mm                                 
          I/O Options      Parallel port, serial ports (2), Instep Board 
                           connector                                     
          NPU Options      80287/80387SX                                 
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose       | Location | Purpose              | Location |
          |---------------+----------+----------------------+----------|
          | Serial port 1 |   CN1    | Parallel port        |   CN3    |
          |---------------+----------+----------------------+----------|
          | Serial port 2 |   CN2    | Instep Board         |   CN4    |
          |               |          | connector            |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function             |   Label   |  Position   |
          |----------------------------------+-----------+-------------|
          |   | IDE interface enabled        |    J4     |    Open     |
          |---+------------------------------+-----------+-------------|
          |   | IDE interface disabled       |    J4     |   Closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
          |-------+-------------+------------+------------+------------|
          | 512KB | (2) 256K x  |    None    |    None    |    None    |
          |       |      9      |            |            |            |
          |-------+-------------+------------+------------+------------|
          |  1MB  | (2) 256K x  | (2) 256K x |    None    |    None    |
          |       |      9      |     9      |            |            |
          |-------+-------------+------------+------------+------------|
          |  2MB  | (2) 1M x 9  |    None    |    None    |    None    |
          |-------+-------------+------------+------------+------------|
          | 2.5MB | (2) 256K x  | (2) 1M x 9 |    None    |    None    |
          |       |      9      |            |            |            |
          |-------+-------------+------------+------------+------------|
          | 2.5MB | (2) 1M x 9  | (2) 256K x |    None    |    None    |
          |       |             |     9      |            |            |
          |-------+-------------+------------+------------+------------|
          |  4MB  | (2) 1M x 9  | (2) 1M x 9 |    None    |    None    |
          |-------+-------------+------------+------------+------------|
          |  6MB  | (2) 1M x 9  | (2) 1M x 9 | (2) 1M x 9 |    None    |
          |-------+-------------+------------+------------+------------|
          |  8MB  | (2) 1M x 9  | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SERIAL PORT 1 INTERRUPT SELECTION              |
          |------------------------------------------------------------|
          |            IRQ             |              JP2              |
          |----------------------------+-------------------------------|
          |    |         IRQ3          |      Pins 9 & 10 closed       |
          |----+-----------------------+-------------------------------|
          | »  |         IRQ4          |      Pins 11 & 12 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SERIAL PORT 2 INTERRUPT SELECTION              |
          |------------------------------------------------------------|
          |            IRQ             |              JP2              |
          |----------------------------+-------------------------------|
          | »   |         IRQ3         |       Pins 5 & 6 closed       |
          |-----+----------------------+-------------------------------|
          |     |         IRQ4         |       Pins 7 & 8 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             PARALLEL PORT INTERRUPT SELECTION              |
          |------------------------------------------------------------|
          |            IRQ             |              JP2              |
          |----------------------------+-------------------------------|
          |     |         IRQ5         |       Pins 3 & 4 closed       |
          |-----+----------------------+-------------------------------|
          | »   |         IRQ7         |       Pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                HANDSHAKE SELECTION (PORT 1)                |
          |------------------------------------------------------------|
          |       Setting       |                 JP3                  |
          |---------------------+--------------------------------------|
          |       Enabled       |     1 & 2, 4 & 5, 7 & 8, 10 & 11     |
          |---------------------+--------------------------------------|
          |      Disabled       |     2 & 3, 5 & 6, 8 & 9, 11 & 12     |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                HANDSHAKE SELECTION (PORT 2)                |
          |------------------------------------------------------------|
          |       Setting       |                 JP4                  |
          |---------------------+--------------------------------------|
          |       Enabled       |     1 & 2, 4 & 5, 7 & 8, 10 & 11     |
          |---------------------+--------------------------------------|
          |      Disabled       |     2 & 3, 5 & 6, 8 & 9, 11 & 12     |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DTE/DCE SELECTION (PORT 1)                 |
          |------------------------------------------------------------|
          |   Setting   |                     JP5                      |
          |-------------+----------------------------------------------|
          |     DTE     | 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  |
          |-------------+----------------------------------------------|
          |     DCE     | 1 & 3, 2 & 4, 5 & 7, 6 & 8, 9 & 11, 12 & 14  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DTE/DCE SELECTION (PORT 2)                 |
          |------------------------------------------------------------|
          |   Setting   |                     JP6                      |
          |-------------+----------------------------------------------|
          |     DTE     | 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  |
          |-------------+----------------------------------------------|
          |     DCE     | 1 & 3, 2 & 4, 5 & 7, 6 & 8, 9 & 11, 12 & 14  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
 (IMG) IMG 2
          
       
          +------------------------------------------------------------+
          |                MISCELLANEOUS TECHNICAL NOTE                |
          |------------------------------------------------------------|
          |      To upgrade to an 80386SX processor, install 80386SX   |
          |      Instep Board at CN4.                                  |
          +------------------------------------------------------------+