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

[Image]

                    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 slow         JP4              closed

      Speed Recalibration set to fast         JP4               open
      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.