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

   EV-125

   Card Type          Multi I/O card                              
   Chipset/Controller N/A                                         
   I/O Options        Game port, parallel port, serial port (2).  
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/E-H/50250-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |    Purpose    |   Location   |    Purpose    |  Location   |
   |---------------+--------------+---------------+-------------|
   | Game port     |      J1      | Serial port B |     J3      |
   |---------------+--------------+---------------+-------------|
   | Parallel port |      J2      | Serial port A |     J4      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT ORDER SELECTION                 |
   |------------------------------------------------------------|
   |         Port Order         |           W5/1 & 2            |
   |----------------------------+-------------------------------|
   |             AB             |      Jumpered vertically      |
   |----------------------------+-------------------------------|
   |             BA             |     Jumpered horizontally     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   BASE MEMORY SELECTION                    |
   |------------------------------------------------------------|
   |     Memory      |            W3            |     W1/6      |
   |-----------------+--------------------------+---------------|
   |      256KB      | Pins 1 & 2, 4 & 5 closed |      On       |
   |-----------------+--------------------------+---------------|
   |      512KB      | Pins 2 & 3, 4 & 5 closed |      Off      |
   |-----------------+--------------------------+---------------|
   |      640KB      | Pins 2 & 3, 5 & 6 closed |      Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 ADDED MEMORY CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Memory  |  W1/1   |  W1/2   |  W1/3   |  W1/4   |  W1/5   |
   |----------+---------+---------+---------+---------+---------|
   |  512KB   |   On    |   On    |   Off   |   On    |   On    |
   |----------+---------+---------+---------+---------+---------|
   |   1MB    |   On    |   Off   |   On    |   On    |   On    |
   |----------+---------+---------+---------+---------+---------|
   |  1.5MB   |   On    |   On    |   Off   |   On    |   On    |
   |----------+---------+---------+---------+---------+---------|
   |   2MB    |   Off   |   On    |   On    |   On    |   On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               EXISTING MEMORY CONFIGURATION                |
   |------------------------------------------------------------|
   |   Memory   |   SW1/1   |   SW1/2   |   SW1/3   |   SW1/4   |
   |------------+-----------+-----------+-----------+-----------|
   |   0-1MB    |    On     |    On     |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   1-2MB    |    On     |    On     |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |   2-3MB    |    On     |    On     |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   3-4MB    |    On     |    Off    |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |   4-5MB    |    On     |    Off    |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   5-6MB    |    On     |    Off    |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |   6-7MB    |    On     |    Off    |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   7-8MB    |    Off    |    On     |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |   8-9MB    |    Off    |    On     |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   9-10MB   |    Off    |    On     |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |  10-11MB   |    Off    |    On     |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |  11-12MB   |    Off    |    Off    |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |  12-13MB   |    Off    |    Off    |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |  13-14MB   |    Off    |    Off    |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |  14-15MB   |    Off    |    Off    |    Off    |    Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             EXTENDED MEMORY FRACTION SELECTION             |
   |------------------------------------------------------------|
   |    Memory     |    SW1/5     |    SW1/6     |    SW1/7     |
   |---------------+--------------+--------------+--------------|
   |      0KB      |      On      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |     128KB     |      On      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |     256KB     |      On      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |     384KB     |      On      |     Off      |     Off      |
   |---------------+--------------+--------------+--------------|
   |     512KB     |     Off      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |     640KB     |     Off      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |     768KB     |     Off      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |     996KB     |     Off      |     Off      |     Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             BASE MEMORY BACKFILL CONFIGURATION             |
   |------------------------------------------------------------|
   |            Status             |           SW1/8            |
   |-------------------------------+----------------------------|
   |           Backfill            |             On             |
   |-------------------------------+----------------------------|
   |          No backfill          |            Off             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             FACTORY CONFIGURED - DO NOT ALTER              |
   |------------------------------------------------------------|
   |            Jumper            |          Position           |
   |------------------------------+-----------------------------|
   |   W5/3, 4, 5, 6, 7, 8, & 9   |             N/A             |
   |------------------------------+-----------------------------|
   |              W7              |      Pins 1 & 2 closed      |
   |------------------------------+-----------------------------|
   |              W8              |      Pins 2 & 3 closed      |
   |------------------------------+-----------------------------|
   |              W9              |  Pins 1 & 2, 4 & 5 closed   |
   |------------------------------+-----------------------------|
   |             W10              |             N/A             |
   |------------------------------+-----------------------------|
   |             W11              |       All Pins closed       |
   |------------------------------+-----------------------------|
   |             W13              |       All Pins closed       |
   |------------------------------+-----------------------------|
   |             W15              |      Pins 2 & 3 closed      |
   |------------------------------+-----------------------------|
   |             W18              |      Pins 1 & 2 closed      |
   |------------------------------+-----------------------------|
   |            W20/A             |            Open             |
   |------------------------------+-----------------------------|
   |            W20/B             |      Pins 2 & 3 closed      |
   |------------------------------+-----------------------------|
   |            W20/C             |      Pins 1 & 2 closed      |
   |------------------------------+-----------------------------|
   |            W20/D             |            Open             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |   Bank 0   |   Bank 1   |   Bank 2   |   Bank 3   |
   |--------+------------+------------+------------+------------|
   | 512KB  | (18) 4464  |    None    |    None    |    None    |
   |--------+------------+------------+------------+------------|
   |  1MB   | (18) 4464  | (18) 4464  |    None    |    None    |
   |--------+------------+------------+------------+------------|
   | 1.5MB  | (18) 4464  | (18) 4464  | (18) 4464  |    None    |
   |--------+------------+------------+------------+------------|
   | 2.0MB  | (18) 4464  | (18) 4464  | (18) 4464  | (18) 4464  |
   +------------------------------------------------------------+