NCL AMERICA
===========

   NCL 5455, NCL 5456

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:     | 16-bit, ISA                                |
   |---------------+--------------------------------------------|
   | Size:         | Half-length, full-height card              |
   |---------------+--------------------------------------------|
   | Hard drives   | Two ST506/412 MFM drives                   |
   | supported:    |                                            |
   |---------------+--------------------------------------------|
   | Floppy drives | NCL 5455: Two 360 KB, 720 KB, 1.2 MB or    |
   | supported:    | 1.44 MB drives                             |
   |---------------+--------------------------------------------|
   |               | NCL 5456: None                             |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/M-O/20385-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | 34-pin control cable connector-hard drive            | CN1 |
   |------------------------------------------------------+-----|
   | 20-pin data cable connector-drive 0                  | CN2 |
   |------------------------------------------------------+-----|
   | 20-pin data cable connector-drive 1                  | CN3 |
   |------------------------------------------------------+-----|
   | 34-pin data cable connector-floppy drive (NCL 5455   | CN4 |
   | only)                                                |     |
   |------------------------------------------------------+-----|
   | 4-pin connector-drive active LED                     | CN5 |
   |------------------------------------------------------+-----|
   | 5-pin DC power connector                             | CN6 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Hard drive address is 1F0-1F7h |   JP1    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive address is 170-177h |   JP1    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | 32Kb ROM enabled               |   JP2    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | 16Kb ROM enabled               |   JP2    | pins 2 & 3 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             |  Location   |  Setting   |
   |---------------------------------+-------------+------------|
   |>> | Floppy drive port address   |     JP7     |   closed   |
   |   | is 3F2-3F7h                 |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive port address   |     JP7     |    open    |
   |   | is 372-377h                 |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Cache enabled               |    JP11     |    open    |
   |---+-----------------------------+-------------+------------|
   |   | Cache disabled              |    JP11     |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | 4Kb buffer enabled          |    JP12     |    open    |
   |---+-----------------------------+-------------+------------|
   |   | 16Kb buffer enabled         |    JP12     |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | 4Kb buffer size selected    | JP14, JP15, | pins 1 & 2 |
   |   |                             |    JP16     |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | 16Kb buffer size selected   | JP14, JP15, | pins 2 & 3 |
   |   |                             |    JP15     |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | All other jumpers are for factory tests and configured as  |
   |  follows: JP4, JP5 - closed; JP6, JP8, JP13 - open; JP9,   |
   |          JP10 - pins 2 & 3 closed - do not alter.          |
   +------------------------------------------------------------+