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

   HCWDXTGEN

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | 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/20522-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 34-pin data 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        |
   |------------------------------------------+-----------------|
   | 4-pin connector - drive active LED       |       J5        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Location | Setting |
   |---------------------------------------+----------+---------|
   |>> | Factory configured - do not alter |   W25    |  open   |
   |---+-----------------------------------+----------+---------|
   |>> | Factory configured - do not alter |   W26    |  open   |
   |---+-----------------------------------+----------+---------|
   |>> | Interrupt select IRQ5             |   W27    |  open   |
   |---+-----------------------------------+----------+---------|
   |   | Interrupt select IRQ2             |   W27    | closed  |
   |---+-----------------------------------+----------+---------|
   |>> | AT compatibility mode enabled     |   W28    | closed  |
   |---+-----------------------------------+----------+---------|
   |   | XT compatibility mode enabled     |   W28    |  open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       ADDRESS SELECT                       |
   |------------------------------------------------------------|
   |  I/O Address  | Base Memory Address |    W21    |   W22    |
   |---------------+---------------------+-----------+----------|
   |     320h      |       C8000h        |   open    |   open   |
   |---------------+---------------------+-----------+----------|
   |     324h      |       CA000h        |  closed   |   open   |
   |---------------+---------------------+-----------+----------|
   |     328h      |       CC000h        |   open    |  closed  |
   |---------------+---------------------+-----------+----------|
   |     32Ch      |       CE000h        |  closed   |  closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PRE-SELECTED DRIVE CONFIGURATION              |
   |------------------------------------------------------------|
   |           |      |         |Drive 0 |Drive 1 |             |
   |-----------+------+---------+--------+--------+-------------|
   | |Capacity |Heads |Cylinders|  W17   |  W18   | W19  | W20  |
   |-+---------+------+---------+--------+--------+------+------|
   |>>|  21MB   |  4   |   615   |  open  |  open  | open | open |
   |-+---------+------+---------+--------+--------+------+------|
   | |  21MB   |  4   |   612   | closed | closed |closed|closed|
   |-+---------+------+---------+--------+--------+------+------|
   | |  10MB   |  4   |   306   |  open  | closed | open |closed|
   |-+---------+------+---------+--------+--------+------+------|
   | |  10MB   |  2   |   615   | closed |  open  |closed| open |
   +------------------------------------------------------------+