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

   EV-390

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:                | 8-bit, ISA                      |
   |--------------------------+---------------------------------|
   | Size:                    | Full-length, full-height card   |
   |--------------------------+---------------------------------|
   | Hard drive supported:    | Two MFM ST506/412 drives        |
   |--------------------------+---------------------------------|
   | Floppy drives supported: | Four 360KB drives               |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/E-H/20712-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 34-pin control cable connector - hard drive     |    J1    |
   |-------------------------------------------------+----------|
   | 20-pin data cable connector - drive 1           |    J2    |
   |-------------------------------------------------+----------|
   | 20-pin data cable connector - drive 2           |    J3    |
   |-------------------------------------------------+----------|
   | 37-pin external drive connector                 |    J4    |
   |-------------------------------------------------+----------|
   | 34-pin control cable connector - floppy drive 1 |    J5    |
   |-------------------------------------------------+----------|
   | 34-pin control cable connector - floppy drive 0 |    J6    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               |  Location  | Setting |
   |-------------------------------------+------------+---------|
   |>> | Floppy drives enabled           |    W10     | Closed  |
   |---+---------------------------------+------------+---------|
   |   | Floppy drives disabled          |    W10     |  Open   |
   |---+---------------------------------+------------+---------|
   |>> | Factory configured - do not     | SW1/jumper |   N/A   |
   |   | alter                           |     5      |         |
   |---+---------------------------------+------------+---------|
   |>> | Factory configured - do not     | SW1/jumper |   N/A   |
   |   | alter                           |     6      |         |
   |---+---------------------------------+------------+---------|
   |>> | Factory configured - do not     | SW1/jumper |   N/A   |
   |   | alter                           |     7      |         |
   |---+---------------------------------+------------+---------|
   |>> | Factory configured - do not     | SW1/jumper |   N/A   |
   |   | alter                           |     8      |         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         3.92A/3.93 EPROM CHIP DRIVE FORMATS - SW1          |
   |------------------------------------------------------------|
   |Capacity|Heads|Cylinders|Drive 1 |Drive 2 |                 |
   |--------+-----+---------+--------+--------+-----------------|
   |        |     |         |Jumper 3|Jumper 4|Jumper 1|Jumper 2|
   |--------+-----+---------+--------+--------+--------+--------|
   |  10MB  |  4  |   306   |  Open  |  Open  |  Open  |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 10.7MB |  2  |   615   | Closed |  Open  | Closed |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 21.4MB |  4  |   615   |  Open  | Closed |  Open  | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 31.9MB |  5  |   733   | Closed | Closed | Closed | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 42.5MB |  5  |   977   | Closed | Closed | Closed | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            3.94 EPROM CHIP DRIVE FORMATS - SW1             |
   |------------------------------------------------------------|
   |Capacity|Heads|Cylinders|Drive 1 |Drive 2 |                 |
   |--------+-----+---------+--------+--------+-----------------|
   |        |     |         |Jumper 3|Jumper 4|Jumper 1|Jumper 2|
   |--------+-----+---------+--------+--------+--------+--------|
   |  10MB  |  4  |   306   |  Open  |  Open  |  Open  |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   |  42MB  |  8  |   615   | Closed |  Open  | Closed |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 21.4MB |  4  |   615   |  Open  | Closed |  Open  | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 42.8MB |  6  |   820   | Closed | Closed | Closed | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            3.95 EPROM CHIP DRIVE FORMATS - SW1             |
   |------------------------------------------------------------|
   |Capacity|Heads|Cylinders|Drive 1 |Drive 2 |                 |
   |--------+-----+---------+--------+--------+-----------------|
   |        |     |         |Jumper 3|Jumper 4|Jumper 1|Jumper 2|
   |--------+-----+---------+--------+--------+--------+--------|
   | 80.2MB |  9  |  1024   |  Open  |  Open  |  Open  |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   |  42MB  |  8  |   615   | Closed |  Open  | Closed |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 21.4MB |  4  |   615   |  Open  | Closed |  Open  | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 42.8MB |  6  |   820   | Closed | Closed | Closed | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            3.96 EPROM CHIP DRIVE FORMATS - SW1             |
   |------------------------------------------------------------|
   |Capacity|Heads|Cylinders|Drive 1 |Drive 2 |                 |
   |--------+-----+---------+--------+--------+-----------------|
   |        |     |         |Jumper 3|Jumper 4|Jumper 1|Jumper 2|
   |--------+-----+---------+--------+--------+--------+--------|
   | 44.5MB |  5  |  1024   |  Open  |  Open  |  Open  |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 71.3MB |  8  |  1024   | Closed |  Open  | Closed |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 21.4MB |  4  |   615   |  Open  | Closed |  Open  | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 31.9MB |  5  |   733   | Closed | Closed | Closed | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            3.97 EPROM CHIP DRIVE FORMATS - SW1             |
   |------------------------------------------------------------|
   |Capacity|Heads|Cylinders|Drive 1 |Drive 2 |                 |
   |--------+-----+---------+--------+--------+-----------------|
   |        |     |         |Jumper 3|Jumper 4|Jumper 1|Jumper 2|
   |--------+-----+---------+--------+--------+--------+--------|
   | 42.2MB |  6  |   809   |  Open  |  Open  |  Open  |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 10.7MB |  2  |   615   | Closed |  Open  | Closed |  Open  |
   |--------+-----+---------+--------+--------+--------+--------|
   | 21.4MB |  4  |   615   |  Open  | Closed |  Open  | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 31.9MB |  5  |   733   | Closed | Closed | Closed | Closed |
   |--------+-----+---------+--------+--------+--------+--------|
   | 42.5MB |  5  |   977   | Closed | Closed | Closed | Closed |
   +------------------------------------------------------------+