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

   NCL 5027

   Data bus:  8-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported:  Two ST506/412 MFM drives

   Floppy drives supported: None

   Sector Interleave: 6:1

<gopher://bitreich.org/I/th99/c/M-O/20143-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                  Function                  |   Location    |
   |--------------------------------------------+---------------|
   | 34-pin control cable connector             |      CN1      |
   |--------------------------------------------+---------------|
   | 20-pin data cable connector-drive 0        |      CN2      |
   |--------------------------------------------+---------------|
   | 20-pin data cable connector-drive 1        |      CN3      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | BIOS enabled                   | JP1/all  |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS disabled                  | JP1/all  |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Speed Recalibration set to     |   JP4    |   closed   |
   |   | slow                           |          |            |
   |---+--------------------------------+----------+------------|
   |   | Speed Recalibration set to     |   JP4    |    open    |
   |   | fast or normal                 |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Head select set up to 8 heads  |   JP6    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Head select set up to 16 heads |   JP6    | pins 2 & 3 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           BIOS DRIVE TYPE TABLE FOR THE NCL5027            |
   |------------------------------------------------------------|
   |Hd/Cyl | # | S1/1 |S1/2 |S1/3 |S1/4 |S1/5 |S1/6 |S1/7 |S1/8 |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 7/699 | 1 |  on  | on  | on  | off | N/A | N/A | N/A | on  |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 6/612 | 1 |  on  | on  | off | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | on  | on  | off | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 4/640 | 1 |  on  | off | on  | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | on  | off | on  | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 4/612 | 1 |  on  | off | on  | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | on  | off | on  | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 2/612 | 1 | off  | on  | on  | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | off | on  | on  | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 2/306 | 1 | off  | on  | off | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | off | on  | off | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 4/320 | 1 | off  | off | on  | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | off | off | on  | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 4/306 | 1 | off  | off | off | off | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | off | off | off | off | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 6/640 | 1 |  on  | on  | on  | on  | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | on  | on  | on  | on  | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 5/733 | 1 |  on  | on  | off | on  | N/A | N/A | N/A | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |       | 2 | N/A  | N/A | N/A | on  | on  | on  | off | off |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 7/733 | 1 |  on  | off | on  | on  | N/A | N/A | N/A | on  |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 5/830 | 1 |  on  | off | off | on  | N/A | N/A | N/A | on  |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 7/830 | 1 | off  | on  | on  | on  | N/A | N/A | N/A | on  |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |10/830 | 1 | off  | on  | off | on  | N/A | N/A | N/A | on  |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   |15/918 | 1 | off  | off | on  | on  | N/A | N/A | N/A | on  |
   |-------+---+------+-----+-----+-----+-----+-----+-----+-----|
   | 5/977 | 1 | off  | off | off | on  | N/A | N/A | N/A | on  |
   |------------------------------------------------------------|
   |Note:SW1/switch 8 must be "on" before power-up to enable the|
   |drive splitting feature.                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | Jumper JP2 is the port address jumper and is hard soldered |
   |                  at the factory to 320h.                   |
   |                                                            |
   |  Jumpers JP3, 5, 7, 8, and 9 are Not used and their exact  |
   |                    location is unknown.                    |
   +------------------------------------------------------------+