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

   NCL 538, NCL 539

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

   Data bus: 16-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported:  Two AT Interface (IDE) drives

   Floppy drives supported: NCL 538: Two 360KB, 720KB, 1.2MB, or


   NCL 539: None

   Maximum heads/cyl.: 16 heads and 2048 cylinders

<gopher://bitreich.org/I/th99/c/M-O/20140-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 34-pin control cable connector-floppy drive     |   CN1    |
   | (NCL 538 only)                                  |          |
   |-------------------------------------------------+----------|
   | 40-pin AT Interface (IDE) control cable         |   CN2    |
   | connector-internal                              |          |
   |-------------------------------------------------+----------|
   | 4-pin connector-drive active LED                |   CN3    |
   |-------------------------------------------------+----------|
   | 5-pin connector-DC power                        |   JP11   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy drive port address is   |   JP1    | pins 1 & 2 |
   |   | 3F2-3F7h (538 only)            |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive port address is   |   JP1    | pins 2 & 3 |
   |   | 372-377h (538 only)            |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | BIOS address is C800h          |   JP2    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS address is CC00h          |   JP2    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy Drive Interrupt is IRQ6 |   JP3    | pins 1 & 2 |
   |   | (538 only)                     |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy Drive Interrupt is      |   JP3    | pins 2 & 3 |
   |   | IRQ10 (538 only)               |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy Drive DMA Acknowledge   |   JP4    | pins 1 & 2 |
   |   | is DACK2 (538 only)            |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy Drive DMA Acknowledge   |   JP4    | pins 2 & 3 |
   |   | is DACK3 (538 only)            |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | IRQ Non-buffered               |   JP5    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | IRQ buffered                   |   JP5    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy Drive DMA Request is    |   JP6    | pins 1 & 2 |
   |   | DRQ2 (538 only)                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy Drive DMA Request is    |   JP6    | pins 2 & 3 |
   |   | DRQ3 (538 only)                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard Drive Interrupt is IRQ14  |   JP7    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard Drive Interrupt is IRQ15  |   JP7    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Zero wait state enabled        |   JP8    |    open    |
   |---+--------------------------------+----------+------------|
   |   | Zero wait state disabled       |   JP8    |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | BIOS enabled                   |   JP9    |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS disabled                  |   JP9    |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive port address is     |   JP10   |    open    |
   |   | 1F0-1F7h                       |          |            |
   |---+--------------------------------+----------+------------|
   |   | Hard drive port address is     |   JP10   |   closed   |
   |   | 170-177h                       |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Normal operation               |   JP11   |    open    |
   |---+--------------------------------+----------+------------|
   |   | Self-diagnostic mode           |   JP11   |   closed   |
   +------------------------------------------------------------+