EVEREX SYSTEMS, INC.
====================

   STEP 386 (REV. D)

   Processor         80386DX                                      
   Processor Speed   16/20MHz                                     
   Chip Set          C & T                                        
   Max. Onboard DRAM 8MB                                          
   Cache             64/128KB                                     
   BIOS              AMI                                          
   Dimensions        355mm x 304mm                                
   I/O Options       32-bit external memory card                  
   NPU Options       80387DX                                      

<gopher://bitreich.org/I/th99/m/E-H/31526-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose                                 |     Location     |
   |-----------------------------------------+------------------|
   | 32-bit external memory card             |        S1        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             | Jumper/Switch | Position |
   |---------------------------------+---------------+----------|
   |>> | Factory configured - do not |      J1       | Unknown  |
   |   | alter                       |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | Factory configured - do not |      J2       | Unknown  |
   |   | alter                       |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | Factory configured - do not |      SW1      | Unknown  |
   |   | alter                       |               |          |
   |---+-----------------------------+---------------+----------|
   |>> | NPU enabled                 |      W3       |  Closed  |
   |---+-----------------------------+---------------+----------|
   |   | NPU disabled                |      W3       |   Open   |
   |---+-----------------------------+---------------+----------|
   |>> | 32-bit memory card enabled  |      W14      |  Closed  |
   |---+-----------------------------+---------------+----------|
   |   | 32-bit memory card disabled |      W14      |   Open   |
   |---+-----------------------------+---------------+----------|
   |>> | Base memory select 640KB    |      W16      |  Closed  |
   |---+-----------------------------+---------------+----------|
   |   | Base memory select 512KB    |      W16      |   Open   |
   |---+-----------------------------+---------------+----------|
   |>> | Bus speed select 10MHz      |      W17      |  Closed  |
   |---+-----------------------------+---------------+----------|
   |   | Bus speed select 6.7MHz     |      W17      |   Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SYSTEM DRAM CONFIGURATION                  |
   |------------------------------------------------------------|
   | Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |   W1   |  W15   |
   |------+--------+--------+--------+--------+--------+--------|
   | 1MB  |  (4)   |  NONE  |  NONE  |  NONE  | Closed | Closed |
   |      | 256K x |        |        |        |        |        |
   |      |   9    |        |        |        |        |        |
   |------+--------+--------+--------+--------+--------+--------|
   | 2MB  |  (4)   |  (4)   |  NONE  |  NONE  | Closed | Closed |
   |      | 256K x | 256K x |        |        |        |        |
   |      |   9    |   9    |        |        |        |        |
   |------+--------+--------+--------+--------+--------+--------|
   | 4MB  | (4) 1M |  NONE  |  NONE  |  NONE  |  Open  |  Open  |
   |      |  x 9   |        |        |        |        |        |
   |------+--------+--------+--------+--------+--------+--------|
   | 4MB  |  (4)   |  (4)   |  (4)   |  (4)   | Closed | Closed |
   |      | 256K x | 256K x | 256K x | 256K x |        |        |
   |      |   9    |   9    |   9    |   9    |        |        |
   |------+--------+--------+--------+--------+--------+--------|
   | 8MB  | (4) 1M | (4) 1M |  NONE  |  NONE  |  Open  |  Open  |
   |      |  x 9   |  x 9   |        |        |        |        |
   |------+--------+--------+--------+--------+--------+--------|
   | 16MB | (4) 1M | (4) 1M | (4) 1M | (4) 1M |  Open  |  Open  |
   |      |  x 9   |  x 9   |  x 9   |  x 9   |        |        |
   |------------------------------------------------------------|
   | Note:Banks 2 & 3, and W1 are located on the external       |
   | memory card.                                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size   |  Bank 0   |  Bank 1   |   TAG   |   Dirty Bit    |
   |         |           |           |         |     (U38)      |
   |---------+-----------+-----------+---------+----------------|
   |  64KB   | (8) 16K x |   NONE    | (2) 16K |  (1) 16K x 4   |
   |         |     4     |           |   x 4   |                |
   |---------+-----------+-----------+---------+----------------|
   |  128KB  | (8) 16K x | (8) 16K x | (2) 16K |  (1) 16K x 4   |
   |         |     4     |     4     |   x 4   |                |
   |------------------------------------------------------------|
   | Note:Each Cache bank must be fully populated when its      |
   | corresponding DRAM bank is populated.                      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                RESISTOR SIPS CONFIGURATION                 |
   |------------------------------------------------------------|
   |              Settings              | Memory Banks enabled  |
   |------------------------------------+-----------------------|
   | RP27, RP30, RP58, & RP61 installed |        Bank 0         |
   |------------------------------------+-----------------------|
   | RP28, RP31, RP59, & RP62 installed |      Bank 0 & 1       |
   |------------------------------------+-----------------------|
   | RP29, RP32, RP60, & RP63 installed |  Banks 0, 1, 2, & 3   |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/E-H/31526-2.png>
   

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |     Size     |         Bank 2          |      Bank 3       |
   |--------------+-------------------------+-------------------|
   |     64KB     |       (8) 16K x 4       |       NONE        |
   |--------------+-------------------------+-------------------|
   |    128KB     |       (8) 16K x 4       |    (8) 16K x 4    |
   |------------------------------------------------------------|
   | Note:Each Cache bank must be fully populated when its      |
   | corresponding DRAM bank is populated.                      |
   +------------------------------------------------------------+