AQUARIUS SYSTEMS, INC.
======================

   AT BUS I/O

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 16-bit ISA                             |
   |-------------------+----------------------------------------|
   | Size:             | Half-length, full-height card          |
   |-------------------+----------------------------------------|
   | Hard drive        | Two IDE(AT) drives                     |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, or 1.44MB     |
   | supported:        | drives                                 |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/A-B/20928-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 40-pin IDE(AT) connector                 |       J1        |
   |------------------------------------------+-----------------|
   | 10-pin serial port 2 - internal          |       J2        |
   |------------------------------------------+-----------------|
   | 9-pin serial port 1 - external           |       J3        |
   |------------------------------------------+-----------------|
   | 25-pin parallel port - external          |       J4        |
   |------------------------------------------+-----------------|
   | 34-pin cable connector - floppy drive    |       J5        |
   |------------------------------------------+-----------------|
   | 2-pin connector - drive active LED       |       J10       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            | Location |    Setting     |
   |--------------------------------+----------+----------------|
   | Floppy transfer rate is 300    |    J6    |     closed     |
   | KB/s                           |          |                |
   |--------------------------------+----------+----------------|
   | Floppy transfer rate is 250    |    J6    |      open      |
   | KB/s                           |          |                |
   |--------------------------------+----------+----------------|
   | IOCHRDY signal enabled         |   JP1    |     closed     |
   |--------------------------------+----------+----------------|
   | IOCHRDY signal disabled        |   JP1    |      open      |
   |--------------------------------+----------+----------------|
   | Floppy drive interface enabled |   JP3    |     closed     |
   |--------------------------------+----------+----------------|
   | Floppy drive interface         |   JP3    |      open      |
   | disabled                       |          |                |
   |--------------------------------+----------+----------------|
   | IDE(AT) interface IRQ14        |    J9    |   pins 1 & 2   |
   | enabled                        |          |     closed     |
   |--------------------------------+----------+----------------|
   | IDE(AT) interface disabled     |    J9    |   pins 2 & 3   |
   |                                |          |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |         LPT         |       JP6/5       |      JP6/6       |
   |---------------------+-------------------+------------------|
   |     LPT1 (378h)     |      closed       |       open       |
   |---------------------+-------------------+------------------|
   |     LPT2 (278h)     |       open        |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 1 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |         COM         |       JP6/1       |      JP6/3       |
   |---------------------+-------------------+------------------|
   |     COM1 (3F8h)     |      closed       |       open       |
   |---------------------+-------------------+------------------|
   |     COM1 (3E8h)     |       open        |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |         COM         |       JP6/2       |      JP6/4       |
   |---------------------+-------------------+------------------|
   |     COM2 (2F8h)     |      closed       |       open       |
   |---------------------+-------------------+------------------|
   |     COM2 (2E8h)     |       open        |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |     IRQ      |     JP2/1     |    JP2/2     |    JP2/3     |
   |--------------+---------------+--------------+--------------|
   |     IRQ4     |    closed     |     open     |     open     |
   |--------------+---------------+--------------+--------------|
   |     IRQ5     |     open      |    closed    |     open     |
   |--------------+---------------+--------------+--------------|
   |     IRQ9     |     open      |     open     |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 2 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |     IRQ      |     JP2/4     |    JP2/5     |    JP2/6     |
   |--------------+---------------+--------------+--------------|
   |     IRQ3     |    closed     |     open     |     open     |
   |--------------+---------------+--------------+--------------|
   |     IRQ5     |     open      |     open     |    closed    |
   |--------------+---------------+--------------+--------------|
   |     IRQ9     |     open      |    closed    |     open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |        IRQ        |       JP2/7        |       JP2/8       |
   |-------------------+--------------------+-------------------|
   |       IRQ5        |       closed       |       open        |
   |-------------------+--------------------+-------------------|
   |       IRQ7        |        open        |      closed       |
   +------------------------------------------------------------+