NEXSTOR, INC.
=============

   NXT-80

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 32-bit VL-Bus                          |
   |-------------------+----------------------------------------|
   | Size:             | Three/quarter-length, full-height card |
   |-------------------+----------------------------------------|
   | Hard drive        | Up to seven SCSI-1 & SCSI-2 devices    |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, or 1.44MB     |
   | supported:        |                                        |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/M-O/20829-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 50-pin SCSI-2 connector - external       |       CN1       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector - internal         |       CN2       |
   |------------------------------------------+-----------------|
   | 34-pin cable connector - floppy drive    |       CN3       |
   |------------------------------------------+-----------------|
   | 4-pin connector - drive active LED       |       JP8       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               |  Location  | Setting |
   |-------------------------------------+------------+---------|
   |>> | Port address 340h select        |    JP1     |  open   |
   |---+---------------------------------+------------+---------|
   |   | Port address 140h select        |    JP1     | closed  |
   |---+---------------------------------+------------+---------|
   |>> | Factory configured - do not     |    JP3     |   N/A   |
   |   | alter                           |            |         |
   |---+---------------------------------+------------+---------|
   |>> | SCSI parity enabled             | JP5/jumper | closed  |
   |   |                                 |     6      |         |
   |---+---------------------------------+------------+---------|
   |   | SCSI parity disabled            | JP5/jumper |  open   |
   |   |                                 |     6      |         |
   |---+---------------------------------+------------+---------|
   |>> | Supports hard drive <1GB or     | JP6/jumper | closed  |
   |   | >1GB not under MS-DOS           |     1      |         |
   |---+---------------------------------+------------+---------|
   |   | Supports hard drive >1GB under  | JP6/jumper |  open   |
   |   | MS-DOS                          |     1      |         |
   |---+---------------------------------+------------+---------|
   |>> | SCSI disconnect/reselect        | JP6/jumper |  open   |
   |   | enabled                         |     3      |         |
   |---+---------------------------------+------------+---------|
   |   | SCSI disconnect/reselect        | JP6/jumper | closed  |
   |   | disabled                        |     3      |         |
   |---+---------------------------------+------------+---------|
   |>> | Synchronous negotiation enabled | JP6/jumper |  open   |
   |   |                                 |     4      |         |
   |---+---------------------------------+------------+---------|
   |   | Synchronous negotiation         | JP6/jumper | closed  |
   |   | disabled                        |     4      |         |
   |---+---------------------------------+------------+---------|
   |>> | Boot up using INT 19 enabled    | JP6/jumper |  open   |
   |   |                                 |     5      |         |
   |---+---------------------------------+------------+---------|
   |   | Boot up using INT 19 disabled   | JP6/jumper | closed  |
   |   |                                 |     5      |         |
   |---+---------------------------------+------------+---------|
   |>> | Floppy drive controller enabled |    JP7     |  open   |
   |---+---------------------------------+------------+---------|
   |   | Floppy drive controller         |    JP7     | closed  |
   |   | disabled                        |            |         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      BASE I/O ADDRESS                      |
   |------------------------------------------------------------|
   |>> i Address   | JP4/jumper 1 | JP4/jumper 2 | JP4/jumper 3 |
   |---------------+--------------+--------------+--------------|
   |>> |  D8000h   |    closed    |    closed    |    closed    |
   |---+-----------+--------------+--------------+--------------|
   |>> |  C8000h   |     open     |    closed    |    closed    |
   |---+-----------+--------------+--------------+--------------|
   |>> |  CC000h   |    closed    |     open     |     open     |
   |---+-----------+--------------+--------------+--------------|
   |>> |  D0000h   |    closed    |     open     |    closed    |
   |---+-----------+--------------+--------------+--------------|
   |>> |  D4000h   |    closed    |    closed    |     open     |
   |---+-----------+--------------+--------------+--------------|
   |>> | Disabled  |     open     |     open     |     open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SCSI ID SELECTION                      |
   |------------------------------------------------------------|
   |  SCSI ID   | JP5/jumper 1  | JP5/jumper 2  | JP5/jumper 3  |
   |------------+---------------+---------------+---------------|
   |>>  |   7   |     open      |     open      |     open      |
   |----+-------+---------------+---------------+---------------|
   |>>  |   0   |    closed     |    closed     |    closed     |
   |----+-------+---------------+---------------+---------------|
   |>>  |   1   |     open      |    closed     |    closed     |
   |----+-------+---------------+---------------+---------------|
   |>>  |   2   |    closed     |     open      |    closed     |
   |----+-------+---------------+---------------+---------------|
   |>>  |   3   |     open      |     open      |    closed     |
   |----+-------+---------------+---------------+---------------|
   |>>  |   4   |    closed     |    closed     |     open      |
   |----+-------+---------------+---------------+---------------|
   |>>  |   5   |     open      |    closed     |     open      |
   |----+-------+---------------+---------------+---------------|
   |>>  |   6   |    closed     |     open      |     open      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   |       IRQ        |    JP5/jumper 4    |    JP5/Jumprt 5    |
   |------------------+--------------------+--------------------|
   |>> |      11      |       closed       |        open        |
   |---+--------------+--------------------+--------------------|
   |>> |      9       |       closed       |       closed       |
   |---+--------------+--------------------+--------------------|
   |>> |      10      |        open        |       closed       |
   |---+--------------+--------------------+--------------------|
   |>> |      12      |        open        |        open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      FLOPTICAL OPTION                      |
   |------------------------------------------------------------|
   |       Mode       |    JP6/Jumper 1     |   JP6/Jumper 2    |
   |------------------+---------------------+-------------------|
   |     Support      |        open         |       open        |
   |------------------+---------------------+-------------------|
   |    No support    |       closed        |      closed       |
   |------------------------------------------------------------|
   | Note: This mode is available only under MS-DOS for IOMEGA  |
   | & Insite floptical drives.                                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | Remove terminators from host adapter only when using both  |
   |                external & internal devices.                |
   +------------------------------------------------------------+