CMS ENHANCEMENTS, INC.
======================

   HCWDWX1

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:                | 8-bit ISA                       |
   |--------------------------+---------------------------------|
   | Size:                    | Half-length, full-height card   |
   |--------------------------+---------------------------------|
   | Hard drive supported:    | Two MFM ST506/412 drives        |
   |--------------------------+---------------------------------|
   | Floppy drives supported: | None                            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/20511-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                  Function                   |   Location   |
   |---------------------------------------------+--------------|
   | 34-pin control cable connector - hard drive |      J1      |
   |---------------------------------------------+--------------|
   | 20-pin data cable connector - drive 0       |      J2      |
   |---------------------------------------------+--------------|
   | 20-pin data cable connector - drive 1       |      J3      |
   |---------------------------------------------+--------------|
   | External power connector                    |      J4      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Factory configured - do not    |   J1/A   |    N/A     |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Factory configured - do not    |   J1/B   |    N/A     |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Factory configured - do not    |   J1/D   |    N/A     |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |   | Controller supports up to 16   |    W6    | pins 1 & 2 |
   |   | heads                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Controller supports up to 8    |    W6    | pins 2 & 3 |
   |   | heads                          |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       ADDRESS SELECT                       |
   |------------------------------------------------------------|
   |  I/O Address  |  Base Memory  |   W3   |    W4    |   W8   |
   |               |    Address    |        |          |        |
   |---------------+---------------+--------+----------+--------|
   |>>  |  320 -   |    C8000 -    | closed | pins 2 & | pins 2 |
   |    |   323h   |    C9FFFh     |        |    3     |  & 3   |
   |----+----------+---------------+--------+----------+--------|
   |    |  324 -   |    CA000 -    | closed | pins 1 & | pins 1 |
   |    |   327h   |    CBFFFh     |        |    2     |  & 2   |
   |----+----------+---------------+--------+----------+--------|
   |    |   N/A    |   Disabled    |  open  |   N/A    |  N/A   |
   |------------------------------------------------------------|
   | Note: All pins designated should be placed in the closed   |
   | position.                                                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PRE-SELECTED DRIVE CONFIGURATIONS              |
   |------------------------------------------------------------|
   |          |     |         | First |  Second   |             |
   |          |     |         | Drive |   Drive   |             |
   |----------+-----+---------+-------+-----------+-------------|
   | |Capacity|Heads|Cylinders| J1/E  |   J1/F    | J1/G | J1/H |
   |-+--------+-----+---------+-------+-----------+------+------|
   |>>|  10MB  |  4  |   306   | open  |   open    | open | open |
   |-+--------+-----+---------+-------+-----------+------+------|
   | |  21MB  |  4  |   612   |closed |  closed   |closed|closed|
   |-+--------+-----+---------+-------+-----------+------+------|
   | |  10MB  |  2  |   612   | open  |  closed   | open |closed|
   |-+--------+-----+---------+-------+-----------+------+------|
   | |  21MB  |  4  |   612   |closed |   open    |closed| open |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INTERRUPT SELECT                      |
   |------------------------------------------------------------|
   |       IRQ        |             W7             |    J1/C    |
   |------------------+----------------------------+------------|
   |>>     |   IRQ5   |     pins 1 & 2 closed      |    open    |
   |-------+----------+----------------------------+------------|
   |       |   IRQ2   |     pins 2 & 3 closed      |   closed   |
   |------------------------------------------------------------|
   | Note: The location of jumper W7 is not identified in       |
   | manufacturer documentation.                                |
   +------------------------------------------------------------+