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

   NCL 539C

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported:  Two IDE (AT) Interface drives

   Floppy drives supported: None

<gopher://bitreich.org/I/th99/c/M-O/20280-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                   |  Location   |
   |----------------------------------------------+-------------|
   | 40-pin IDE (AT) Interface connector-internal |     CN2     |
   |----------------------------------------------+-------------|
   | 4-pin connector-drive active LED             |     CN3     |
   |----------------------------------------------+-------------|
   | 5-pin connector-DC Power                     |     CN4     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Location | Setting  |
   |--------------------------------------+----------+----------|
   |>> | BIOS address is DC00h            |   JP2    | pins 1-2 |
   |   |                                  |          |  closed  |
   |---+----------------------------------+----------+----------|
   |   | BIOS address is CC00h            |   JP2    | pins 2-3 |
   |   |                                  |          |  closed  |
   |---+----------------------------------+----------+----------|
   |>> | IRQ connected directly to host   |   JP5    | pins 1-2 |
   |   |                                  |          |  closed  |
   |---+----------------------------------+----------+----------|
   |   | IRQ Buffer mode enabled          |   JP5    | pins 2-3 |
   |   |                                  |          |  closed  |
   |---+----------------------------------+----------+----------|
   |>> | Interrupt request is IRQ15       |   JP7    | pins 2-3 |
   |   |                                  |          |  closed  |
   |---+----------------------------------+----------+----------|
   |   | Interrupt request is IRQ14       |   JP7    | pins 1-2 |
   |   |                                  |          |  closed  |
   |---+----------------------------------+----------+----------|
   |>> | I/O Channel Ready disabled       |   JP8    |   open   |
   |---+----------------------------------+----------+----------|
   |   | I/O Channel Ready enabled        |   JP8    |  closed  |
   |---+----------------------------------+----------+----------|
   |>> | BIOS enabled                     |   JP9    |  closed  |
   |---+----------------------------------+----------+----------|
   |   | BIOS disabled                    |   JP9    |   open   |
   |---+----------------------------------+----------+----------|
   |>> | Hard drive port address is       |   JP10   |  closed  |
   |   | 170-177h                         |          |          |
   |---+----------------------------------+----------+----------|
   |   | Hard drive port address is       |   JP10   |   open   |
   |   | 1F0-1F7h                         |          |          |
   |---+----------------------------------+----------+----------|
   |>> | Normal Operation                 |   JP11   |   open   |
   |---+----------------------------------+----------+----------|
   |   | Diagnostic Mode                  |   JP11   |  closed  |
   +------------------------------------------------------------+